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Fügen Sie Daten zu Cloud Firestore hinzu

Mit Sammlungen den Überblick behalten Sie können Inhalte basierend auf Ihren Einstellungen speichern und kategorisieren.

Es gibt mehrere Möglichkeiten, Daten in Cloud Firestore zu schreiben:

  • Legen Sie die Daten eines Dokuments innerhalb einer Sammlung fest, indem Sie explizit eine Dokumentkennung angeben.
  • Hinzufügen eines neuen Dokuments zu einer Sammlung. In diesem Fall generiert Cloud Firestore automatisch die Dokumentkennung.
  • Erstellen Sie ein leeres Dokument mit einer automatisch generierten Kennung und weisen Sie ihm später Daten zu.

In dieser Anleitung wird erläutert, wie Sie einzelne Dokumente in Cloud Firestore verwenden, hinzufügen oder aktualisieren. Wenn Sie Daten in großen Mengen schreiben möchten, siehe Transaktionen und gestapelte Schreibvorgänge .

Bevor Sie beginnen

Informationen zum Erstellen einer Cloud Firestore-Datenbank finden Sie unter Erste Schritte mit Cloud Firestore.

Initialisieren Sie Cloud Firestore

Initialisieren Sie eine Instanz von Cloud Firestore:

Web version 9

import { initializeApp } from "firebase/app";
import { getFirestore } from "firebase/firestore";

// TODO: Replace the following with your app's Firebase project configuration
// See: https://support.google.com/firebase/answer/7015592
const firebaseConfig = {
    FIREBASE_CONFIGURATION
};

// Initialize Firebase
const app = initializeApp(firebaseConfig);


// Initialize Cloud Firestore and get a reference to the service
const db = getFirestore(app);

Ersetzen Sie FIREBASE_CONFIGURATION durch die firebaseConfig Ihrer Web-App.

Informationen zum Beibehalten von Daten, wenn das Gerät seine Verbindung verliert, finden Sie in der Dokumentation zum Aktivieren von Offline-Daten .

Web version 8

import firebase from "firebase/app";
import "firebase/firestore";

// TODO: Replace the following with your app's Firebase project configuration
// See: https://support.google.com/firebase/answer/7015592
const firebaseConfig = {
    FIREBASE_CONFIGURATION
};

// Initialize Firebase
firebase.initializeApp(firebaseConfig);


// Initialize Cloud Firestore and get a reference to the service
const db = firebase.firestore();

Ersetzen Sie FIREBASE_CONFIGURATION durch die firebaseConfig Ihrer Web-App.

Informationen zum Beibehalten von Daten, wenn das Gerät seine Verbindung verliert, finden Sie in der Dokumentation zum Aktivieren von Offline-Daten .

Schnell
Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
import FirebaseCore
import FirebaseFirestore
FirebaseApp.configure()

let db = Firestore.firestore()
Ziel c
Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
@import FirebaseCore;
@import FirebaseFirestore;

// Use Firebase library to configure APIs
[FIRApp configure];
  
FIRFirestore *defaultFirestore = [FIRFirestore firestore];

Java

// Access a Cloud Firestore instance from your Activity
FirebaseFirestore db = FirebaseFirestore.getInstance();

Kotlin+KTX

// Access a Cloud Firestore instance from your Activity
val db = Firebase.firestore

Dart

db = FirebaseFirestore.instance;
Java
Das Cloud Firestore SDK wird je nach Umgebung auf unterschiedliche Weise initialisiert. Nachfolgend sind die gängigsten Methoden aufgeführt. Eine vollständige Referenz finden Sie unter Initialize the Admin SDK .
  • In Google Cloud
    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.cloud.firestore.Firestore;
    
    import com.google.firebase.FirebaseApp;
    import com.google.firebase.FirebaseOptions;
    
    // Use the application default credentials
    GoogleCredentials credentials = GoogleCredentials.getApplicationDefault();
    FirebaseOptions options = new FirebaseOptions.Builder()
        .setCredentials(credentials)
        .setProjectId(projectId)
        .build();
    FirebaseApp.initializeApp(options);
    
    Firestore db = FirestoreClient.getFirestore();
    
    initialisieren
  • Initialisieren Sie auf Ihrem eigenen Server

    Um das Firebase Admin SDK auf Ihrem eigenen Server zu verwenden, verwenden Sie ein Dienstkonto .

    Gehen Sie in der Google Cloud-Konsole zu IAM & Verwaltung > Dienstkonten . Generieren Sie einen neuen privaten Schlüssel und speichern Sie die JSON-Datei. Verwenden Sie dann die Datei, um das SDK zu initialisieren:

    import com.google.auth.oauth2.GoogleCredentials;
    import com.google.cloud.firestore.Firestore;
    
    import com.google.firebase.FirebaseApp;
    import com.google.firebase.FirebaseOptions;
    
    // Use a service account
    InputStream serviceAccount = new FileInputStream("path/to/serviceAccount.json");
    GoogleCredentials credentials = GoogleCredentials.fromStream(serviceAccount);
    FirebaseOptions options = new FirebaseOptions.Builder()
        .setCredentials(credentials)
        .build();
    FirebaseApp.initializeApp(options);
    
    Firestore db = FirestoreClient.getFirestore();
    
  • Python
    Das Cloud Firestore SDK wird je nach Umgebung auf unterschiedliche Weise initialisiert. Nachfolgend sind die gängigsten Methoden aufgeführt. Eine vollständige Referenz finden Sie unter Initialize the Admin SDK .
  • In Google Cloud
    import firebase_admin
    from firebase_admin import firestore
    
    # Application Default credentials are automatically created.
    app = firebase_admin.initialize_app()
    db = firestore.client()
    initialisieren

    Eine vorhandene Standardanmeldeinformation einer Anwendung kann auch verwendet werden, um das SDK zu initialisieren.

    import firebase_admin
    from firebase_admin import credentials
    from firebase_admin import firestore
    
    # Use the application default credentials.
    cred = credentials.ApplicationDefault()
    
    firebase_admin.initialize_app(cred)
    db = firestore.client()
  • Initialisieren Sie auf Ihrem eigenen Server

    Um das Firebase Admin SDK auf Ihrem eigenen Server zu verwenden, verwenden Sie ein Dienstkonto .

    Gehen Sie in der Google Cloud-Konsole zu IAM & Verwaltung > Dienstkonten . Generieren Sie einen neuen privaten Schlüssel und speichern Sie die JSON-Datei. Verwenden Sie dann die Datei, um das SDK zu initialisieren:

    import firebase_admin
    from firebase_admin import credentials
    from firebase_admin import firestore
    
    # Use a service account.
    cred = credentials.Certificate('path/to/serviceAccount.json')
    
    app = firebase_admin.initialize_app(cred)
    
    db = firestore.client()
  • Python

    Das Cloud Firestore SDK wird je nach Umgebung auf unterschiedliche Weise initialisiert. Nachfolgend sind die gängigsten Methoden aufgeführt. Eine vollständige Referenz finden Sie unter Initialize the Admin SDK .
  • In Google Cloud
    import firebase_admin
    from firebase_admin import firestore_async
    
    # Application Default credentials are automatically created.
    app = firebase_admin.initialize_app()
    db = firestore_async.client()
    initialisieren

    Eine vorhandene Standardanmeldeinformation einer Anwendung kann auch verwendet werden, um das SDK zu initialisieren.

    import firebase_admin
    from firebase_admin import credentials
    from firebase_admin import firestore_async
    
    # Use the application default credentials.
    cred = credentials.ApplicationDefault()
    
    firebase_admin.initialize_app(cred)
    db = firestore_async.client()
  • Initialisieren Sie auf Ihrem eigenen Server

    Um das Firebase Admin SDK auf Ihrem eigenen Server zu verwenden, verwenden Sie ein Dienstkonto .

    Gehen Sie in der Google Cloud-Konsole zu IAM & Verwaltung > Dienstkonten . Generieren Sie einen neuen privaten Schlüssel und speichern Sie die JSON-Datei. Verwenden Sie dann die Datei, um das SDK zu initialisieren:

    import firebase_admin
    from firebase_admin import credentials
    from firebase_admin import firestore_async
    
    # Use a service account.
    cred = credentials.Certificate('path/to/serviceAccount.json')
    
    app = firebase_admin.initialize_app(cred)
    
    db = firestore_async.client()
  • C++
    // Make sure the call to `Create()` happens some time before you call Firestore::GetInstance().
    App::Create();
    Firestore* db = Firestore::GetInstance();
    Node.js
    Das Cloud Firestore SDK wird je nach Umgebung auf unterschiedliche Weise initialisiert. Nachfolgend sind die gängigsten Methoden aufgeführt. Eine vollständige Referenz finden Sie unter Initialize the Admin SDK .
    • In Cloud Functions initialisieren
      const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
      const { getFirestore, Timestamp, FieldValue } = require('firebase-admin/firestore');
      initializeApp();
      
      const db = getFirestore();
      
    • In Google Cloud
      const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
      const { getFirestore, Timestamp, FieldValue } = require('firebase-admin/firestore');
      initializeApp({
        credential: applicationDefault()
      });
      
      const db = getFirestore();
      initialisieren
    • Initialisieren Sie auf Ihrem eigenen Server

      Um das Firebase Admin SDK auf Ihrem eigenen Server (oder einer anderen Node.js-Umgebung) zu verwenden, verwenden Sie ein Dienstkonto . Gehen Sie in der Google Cloud-Konsole zu IAM & Verwaltung > Dienstkonten . Generieren Sie einen neuen privaten Schlüssel und speichern Sie die JSON-Datei. Verwenden Sie dann die Datei, um das SDK zu initialisieren:

      const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
      const { getFirestore, Timestamp, FieldValue } = require('firebase-admin/firestore');
      const serviceAccount = require('./path/to/serviceAccountKey.json');
      
      initializeApp({
        credential: cert(serviceAccount)
      });
      
      const db = getFirestore();
      
    gehen
    Das Cloud Firestore SDK wird je nach Umgebung auf unterschiedliche Weise initialisiert. Nachfolgend sind die gängigsten Methoden aufgeführt. Eine vollständige Referenz finden Sie unter Initialize the Admin SDK .
  • In Google Cloud
    import (
      "log"
    
      firebase "firebase.google.com/go"
      "google.golang.org/api/option"
    )
    
    // Use the application default credentials
    ctx := context.Background()
    conf := &firebase.Config{ProjectID: projectID}
    app, err := firebase.NewApp(ctx, conf)
    if err != nil {
      log.Fatalln(err)
    }
    
    client, err := app.Firestore(ctx)
    if err != nil {
      log.Fatalln(err)
    }
    defer client.Close()
    
    initialisieren
  • Initialisieren Sie auf Ihrem eigenen Server

    Um das Firebase Admin SDK auf Ihrem eigenen Server zu verwenden, verwenden Sie ein Dienstkonto .

    Gehen Sie in der Google Cloud-Konsole zu IAM & Verwaltung > Dienstkonten . Generieren Sie einen neuen privaten Schlüssel und speichern Sie die JSON-Datei. Verwenden Sie dann die Datei, um das SDK zu initialisieren:

    import (
      "log"
    
      firebase "firebase.google.com/go"
      "google.golang.org/api/option"
    )
    
    // Use a service account
    ctx := context.Background()
    sa := option.WithCredentialsFile("path/to/serviceAccount.json")
    app, err := firebase.NewApp(ctx, nil, sa)
    if err != nil {
      log.Fatalln(err)
    }
    
    client, err := app.Firestore(ctx)
    if err != nil {
      log.Fatalln(err)
    }
    defer client.Close()
    
  • PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    use Google\Cloud\Firestore\FirestoreClient;
    
    /**
     * Initialize Cloud Firestore with default project ID.
     */
    function setup_client_create(string $projectId = null)
    {
        // Create the Cloud Firestore client
        if (empty($projectId)) {
            // The `projectId` parameter is optional and represents which project the
            // client will act on behalf of. If not supplied, the client falls back to
            // the default project inferred from the environment.
            $db = new FirestoreClient();
            printf('Created Cloud Firestore client with default project ID.' . PHP_EOL);
        } else {
            $db = new FirestoreClient([
                'projectId' => $projectId,
            ]);
            printf('Created Cloud Firestore client with project ID: %s' . PHP_EOL, $projectId);
        }
    }
    Einheit
    using Firebase.Firestore;
    using Firebase.Extensions;
    FirebaseFirestore db = FirebaseFirestore.DefaultInstance;
    C#

    C#

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    FirestoreDb db = FirestoreDb.Create(project);
    Console.WriteLine("Created Cloud Firestore client with project ID: {0}", project);
    Rubin
    require "google/cloud/firestore"
    
    # The `project_id` parameter is optional and represents which project the
    # client will act on behalf of. If not supplied, the client falls back to the
    # default project inferred from the environment.
    firestore = Google::Cloud::Firestore.new project_id: project_id
    
    puts "Created Cloud Firestore client with given project ID."

    Legen Sie ein Dokument fest

    Um ein einzelnes Dokument zu erstellen oder zu überschreiben, verwenden Sie die folgenden sprachspezifischen set() -Methoden:

    Web version 9

    Verwenden Sie die Methode setDoc() :

    import { doc, setDoc } from "firebase/firestore"; 
    
    // Add a new document in collection "cities"
    await setDoc(doc(db, "cities", "LA"), {
      name: "Los Angeles",
      state: "CA",
      country: "USA"
    });

    Web version 8

    Verwenden Sie die Methode set() :

    // Add a new document in collection "cities"
    db.collection("cities").doc("LA").set({
        name: "Los Angeles",
        state: "CA",
        country: "USA"
    })
    .then(() => {
        console.log("Document successfully written!");
    })
    .catch((error) => {
        console.error("Error writing document: ", error);
    });
    Schnell

    Verwenden Sie die Methode setData() :

    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Add a new document in collection "cities"
    db.collection("cities").document("LA").setData([
        "name": "Los Angeles",
        "state": "CA",
        "country": "USA"
    ]) { err in
        if let err = err {
            print("Error writing document: \(err)")
        } else {
            print("Document successfully written!")
        }
    }
    Ziel c

    Verwenden Sie die setData: Methode:

    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Add a new document in collection "cities"
    [[[self.db collectionWithPath:@"cities"] documentWithPath:@"LA"] setData:@{
      @"name": @"Los Angeles",
      @"state": @"CA",
      @"country": @"USA"
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error writing document: %@", error);
      } else {
        NSLog(@"Document successfully written!");
      }
    }];

    Kotlin+KTX

    Verwenden Sie die Methode set() :

    val city = hashMapOf(
            "name" to "Los Angeles",
            "state" to "CA",
            "country" to "USA"
    )
    
    db.collection("cities").document("LA")
            .set(city)
            .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully written!") }
            .addOnFailureListener { e -> Log.w(TAG, "Error writing document", e) }

    Java

    Verwenden Sie die Methode set() :

    Map<String, Object> city = new HashMap<>();
    city.put("name", "Los Angeles");
    city.put("state", "CA");
    city.put("country", "USA");
    
    db.collection("cities").document("LA")
            .set(city)
            .addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    Log.d(TAG, "DocumentSnapshot successfully written!");
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.w(TAG, "Error writing document", e);
                }
            });
    

    Dart

    Verwenden Sie die Methode set() :

    final city = <String, String>{
      "name": "Los Angeles",
      "state": "CA",
      "country": "USA"
    };
    
    db
        .collection("cities")
        .doc("LA")
        .set(city)
        .onError((e, _) => print("Error writing document: $e"));
    Java

    Verwenden Sie die Methode set() :

    // Create a Map to store the data we want to set
    Map<String, Object> docData = new HashMap<>();
    docData.put("name", "Los Angeles");
    docData.put("state", "CA");
    docData.put("country", "USA");
    docData.put("regions", Arrays.asList("west_coast", "socal"));
    // Add a new document (asynchronously) in collection "cities" with id "LA"
    ApiFuture<WriteResult> future = db.collection("cities").document("LA").set(docData);
    // ...
    // future.get() blocks on response
    System.out.println("Update time : " + future.get().getUpdateTime());
    Python

    Verwenden Sie die Methode set() :

    data = {
        u'name': u'Los Angeles',
        u'state': u'CA',
        u'country': u'USA'
    }
    
    # Add a new doc in collection 'cities' with ID 'LA'
    db.collection(u'cities').document(u'LA').set(data)

    Python

    Verwenden Sie die Methode set() :

    data = {"name": "Los Angeles", "state": "CA", "country": "USA"}
    
    # Add a new doc in collection 'cities' with ID 'LA'
    await db.collection("cities").document("LA").set(data)
    C++

    Verwenden Sie die Set() -Methode:

    // Add a new document in collection 'cities'
    db->Collection("cities")
        .Document("LA")
        .Set({{"name", FieldValue::String("Los Angeles")},
              {"state", FieldValue::String("CA")},
              {"country", FieldValue::String("USA")}})
        .OnCompletion([](const Future<void>& future) {
          if (future.error() == Error::kErrorOk) {
            std::cout << "DocumentSnapshot successfully written!" << std::endl;
          } else {
            std::cout << "Error writing document: " << future.error_message()
                      << std::endl;
          }
        });
    Node.js

    Verwenden Sie die Methode set() :

    const data = {
      name: 'Los Angeles',
      state: 'CA',
      country: 'USA'
    };
    
    // Add a new document in collection "cities" with ID 'LA'
    const res = await db.collection('cities').doc('LA').set(data);
    gehen

    Verwenden Sie die Set() -Methode:

    _, err := client.Collection("cities").Doc("LA").Set(ctx, map[string]interface{}{
    	"name":    "Los Angeles",
    	"state":   "CA",
    	"country": "USA",
    })
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    Verwenden Sie die Methode set() :

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $data = [
        'name' => 'Los Angeles',
        'state' => 'CA',
        'country' => 'USA'
    ];
    $db->collection('samples/php/cities')->document('LA')->set($data);
    Einheit

    Verwenden Sie die Methode SetAsync() :

    DocumentReference docRef = db.Collection("cities").Document("LA");
    Dictionary<string, object> city = new Dictionary<string, object>
    {
    	{ "Name", "Los Angeles" },
    	{ "State", "CA" },
    	{ "Country", "USA" }
    };
    docRef.SetAsync(city).ContinueWithOnMainThread(task => {
    	Debug.Log("Added data to the LA document in the cities collection.");
    });
    C#

    Verwenden Sie die Methode SetAsync() :

    DocumentReference docRef = db.Collection("cities").Document("LA");
    Dictionary<string, object> city = new Dictionary<string, object>
    {
        { "name", "Los Angeles" },
        { "state", "CA" },
        { "country", "USA" }
    };
    await docRef.SetAsync(city);
    Rubin

    Verwenden Sie die Methode set() :

    city_ref = firestore.doc "#{collection_path}/LA"
    
    data = {
      name:    "Los Angeles",
      state:   "CA",
      country: "USA"
    }
    
    city_ref.set data

    Wenn das Dokument nicht existiert, wird es erstellt. Wenn das Dokument vorhanden ist, wird sein Inhalt mit den neu bereitgestellten Daten überschrieben, es sei denn, Sie geben an, dass die Daten wie folgt mit dem vorhandenen Dokument zusammengeführt werden sollen:

    Web version 9

    import { doc, setDoc } from "firebase/firestore"; 
    
    const cityRef = doc(db, 'cities', 'BJ');
    setDoc(cityRef, { capital: true }, { merge: true });

    Web version 8

    var cityRef = db.collection('cities').doc('BJ');
    
    var setWithMerge = cityRef.set({
        capital: true
    }, { merge: true });
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Update one field, creating the document if it does not exist.
    db.collection("cities").document("BJ").setData([ "capital": true ], merge: true)
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Write to the document reference, merging data with existing
    // if the document already exists
    [[[self.db collectionWithPath:@"cities"] documentWithPath:@"BJ"]
         setData:@{ @"capital": @YES }
         merge:YES
         completion:^(NSError * _Nullable error) {
           // ...
         }];

    Kotlin+KTX

    // Update one field, creating the document if it does not already exist.
    val data = hashMapOf("capital" to true)
    
    db.collection("cities").document("BJ")
            .set(data, SetOptions.merge())
    

    Java

    // Update one field, creating the document if it does not already exist.
    Map<String, Object> data = new HashMap<>();
    data.put("capital", true);
    
    db.collection("cities").document("BJ")
            .set(data, SetOptions.merge());
    

    Dart

    // Update one field, creating the document if it does not already exist.
    final data = {"capital": true};
    
    db.collection("cities").doc("BJ").set(data, SetOptions(merge: true));
    Java
    // asynchronously update doc, create the document if missing
    Map<String, Object> update = new HashMap<>();
    update.put("capital", true);
    
    ApiFuture<WriteResult> writeResult =
        db.collection("cities").document("BJ").set(update, SetOptions.merge());
    // ...
    System.out.println("Update time : " + writeResult.get().getUpdateTime());
    Python
    city_ref = db.collection(u'cities').document(u'BJ')
    
    city_ref.set({
        u'capital': True
    }, merge=True)

    Python

    city_ref = db.collection("cities").document("BJ")
    
    await city_ref.set({"capital": True}, merge=True)
    C++
    db->Collection("cities").Document("BJ").Set(
        {{"capital", FieldValue::Boolean(true)}}, SetOptions::Merge());
    Node.js
    const cityRef = db.collection('cities').doc('BJ');
    
    const res = await cityRef.set({
      capital: true
    }, { merge: true });
    gehen
    _, err := client.Collection("cities").Doc("BJ").Set(ctx, map[string]interface{}{
    	"capital": true,
    }, firestore.MergeAll)
    
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $cityRef = $db->collection('samples/php/cities')->document('BJ');
    $cityRef->set([
        'capital' => true
    ], ['merge' => true]);
    Einheit
    DocumentReference docRef = db.Collection("cities").Document("LA");
    Dictionary<string, object> update = new Dictionary<string, object>
    {
    	{ "capital", false }
    };
    docRef.SetAsync(update, SetOptions.MergeAll);
    C#
    DocumentReference docRef = db.Collection("cities").Document("LA");
    Dictionary<string, object> update = new Dictionary<string, object>
    {
        { "capital", false }
    };
    await docRef.SetAsync(update, SetOptions.MergeAll);
    Rubin
    city_ref = firestore.doc "#{collection_path}/LA"
    city_ref.set({ capital: false }, merge: true)

    Wenn Sie nicht sicher sind, ob das Dokument existiert, übergeben Sie die Option zum Zusammenführen der neuen Daten mit einem vorhandenen Dokument, um zu vermeiden, dass ganze Dokumente überschrieben werden. Beachten Sie bei Dokumenten, die Karten enthalten, dass die Angabe eines Satzes mit einem Feld, das eine leere Karte enthält, das Kartenfeld des Zieldokuments überschreibt.

    Datentypen

    Mit Cloud Firestore können Sie eine Vielzahl von Datentypen in ein Dokument schreiben, darunter Zeichenfolgen, boolesche Werte, Zahlen, Datumsangaben, Null und verschachtelte Arrays und Objekte. Cloud Firestore speichert Zahlen immer als Doubles, unabhängig davon, welche Art von Zahl Sie in Ihrem Code verwenden.

    Web version 9

    import { doc, setDoc, Timestamp } from "firebase/firestore"; 
    
    const docData = {
        stringExample: "Hello world!",
        booleanExample: true,
        numberExample: 3.14159265,
        dateExample: Timestamp.fromDate(new Date("December 10, 1815")),
        arrayExample: [5, true, "hello"],
        nullExample: null,
        objectExample: {
            a: 5,
            b: {
                nested: "foo"
            }
        }
    };
    await setDoc(doc(db, "data", "one"), docData);

    Web version 8

    var docData = {
        stringExample: "Hello world!",
        booleanExample: true,
        numberExample: 3.14159265,
        dateExample: firebase.firestore.Timestamp.fromDate(new Date("December 10, 1815")),
        arrayExample: [5, true, "hello"],
        nullExample: null,
        objectExample: {
            a: 5,
            b: {
                nested: "foo"
            }
        }
    };
    db.collection("data").doc("one").set(docData).then(() => {
        console.log("Document successfully written!");
    });
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    let docData: [String: Any] = [
        "stringExample": "Hello world!",
        "booleanExample": true,
        "numberExample": 3.14159265,
        "dateExample": Timestamp(date: Date()),
        "arrayExample": [5, true, "hello"],
        "nullExample": NSNull(),
        "objectExample": [
            "a": 5,
            "b": [
                "nested": "foo"
            ]
        ]
    ]
    db.collection("data").document("one").setData(docData) { err in
        if let err = err {
            print("Error writing document: \(err)")
        } else {
            print("Document successfully written!")
        }
    }
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    NSDictionary *docData = @{
      @"stringExample": @"Hello world!",
      @"booleanExample": @YES,
      @"numberExample": @3.14,
      @"dateExample": [FIRTimestamp timestampWithDate:[NSDate date]],
      @"arrayExample": @[@5, @YES, @"hello"],
      @"nullExample": [NSNull null],
      @"objectExample": @{
        @"a": @5,
        @"b": @{
          @"nested": @"foo"
        }
      }
    };
    
    [[[self.db collectionWithPath:@"data"] documentWithPath:@"one"] setData:docData
        completion:^(NSError * _Nullable error) {
          if (error != nil) {
            NSLog(@"Error writing document: %@", error);
          } else {
            NSLog(@"Document successfully written!");
          }
        }];

    Kotlin+KTX

    val docData = hashMapOf(
            "stringExample" to "Hello world!",
            "booleanExample" to true,
            "numberExample" to 3.14159265,
            "dateExample" to Timestamp(Date()),
            "listExample" to arrayListOf(1, 2, 3),
            "nullExample" to null
    )
    
    val nestedData = hashMapOf(
            "a" to 5,
            "b" to true
    )
    
    docData["objectExample"] = nestedData
    
    db.collection("data").document("one")
            .set(docData)
            .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully written!") }
            .addOnFailureListener { e -> Log.w(TAG, "Error writing document", e) }
    

    Java

    Map<String, Object> docData = new HashMap<>();
    docData.put("stringExample", "Hello world!");
    docData.put("booleanExample", true);
    docData.put("numberExample", 3.14159265);
    docData.put("dateExample", new Timestamp(new Date()));
    docData.put("listExample", Arrays.asList(1, 2, 3));
    docData.put("nullExample", null);
    
    Map<String, Object> nestedData = new HashMap<>();
    nestedData.put("a", 5);
    nestedData.put("b", true);
    
    docData.put("objectExample", nestedData);
    
    db.collection("data").document("one")
            .set(docData)
            .addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    Log.d(TAG, "DocumentSnapshot successfully written!");
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.w(TAG, "Error writing document", e);
                }
            });
    

    Dart

    final docData = {
      "stringExample": "Hello world!",
      "booleanExample": true,
      "numberExample": 3.14159265,
      "dateExample": Timestamp.now(),
      "listExample": [1, 2, 3],
      "nullExample": null
    };
    
    final nestedData = {
      "a": 5,
      "b": true,
    };
    
    docData["objectExample"] = nestedData;
    
    db
        .collection("data")
        .doc("one")
        .set(docData)
        .onError((e, _) => print("Error writing document: $e"));
    Java
    Map<String, Object> docData = new HashMap<>();
    docData.put("stringExample", "Hello, World");
    docData.put("booleanExample", false);
    docData.put("numberExample", 3.14159265);
    docData.put("nullExample", null);
    
    ArrayList<Object> arrayExample = new ArrayList<>();
    Collections.addAll(arrayExample, 5L, true, "hello");
    docData.put("arrayExample", arrayExample);
    
    Map<String, Object> objectExample = new HashMap<>();
    objectExample.put("a", 5L);
    objectExample.put("b", true);
    
    docData.put("objectExample", objectExample);
    
    ApiFuture<WriteResult> future = db.collection("data").document("one").set(docData);
    System.out.println("Update time : " + future.get().getUpdateTime());
    Python
    data = {
        u'stringExample': u'Hello, World!',
        u'booleanExample': True,
        u'numberExample': 3.14159265,
        u'dateExample': datetime.datetime.now(tz=datetime.timezone.utc),
        u'arrayExample': [5, True, u'hello'],
        u'nullExample': None,
        u'objectExample': {
            u'a': 5,
            u'b': True
        }
    }
    
    db.collection(u'data').document(u'one').set(data)

    Python

    data = {
        "stringExample": "Hello, World!",
        "booleanExample": True,
        "numberExample": 3.14159265,
        "dateExample": datetime.datetime.now(tz=datetime.timezone.utc),
        "arrayExample": [5, True, "hello"],
        "nullExample": None,
        "objectExample": {"a": 5, "b": True},
    }
    
    await db.collection("data").document("one").set(data)
    C++
    MapFieldValue doc_data{
        {"stringExample", FieldValue::String("Hello world!")},
        {"booleanExample", FieldValue::Boolean(true)},
        {"numberExample", FieldValue::Double(3.14159265)},
        {"dateExample", FieldValue::Timestamp(Timestamp::Now())},
        {"arrayExample", FieldValue::Array({FieldValue::Integer(1),
                                            FieldValue::Integer(2),
                                            FieldValue::Integer(3)})},
        {"nullExample", FieldValue::Null()},
        {"objectExample",
         FieldValue::Map(
             {{"a", FieldValue::Integer(5)},
              {"b", FieldValue::Map(
                        {{"nested", FieldValue::String("foo")}})}})},
    };
    
    db->Collection("data").Document("one").Set(doc_data).OnCompletion(
        [](const Future<void>& future) {
          if (future.error() == Error::kErrorOk) {
            std::cout << "DocumentSnapshot successfully written!" << std::endl;
          } else {
            std::cout << "Error writing document: " << future.error_message()
                      << std::endl;
          }
        });
    Node.js
    const data = {
      stringExample: 'Hello, World!',
      booleanExample: true,
      numberExample: 3.14159265,
      dateExample: Timestamp.fromDate(new Date('December 10, 1815')),
      arrayExample: [5, true, 'hello'],
      nullExample: null,
      objectExample: {
        a: 5,
        b: true
      }
    };
    
    const res = await db.collection('data').doc('one').set(data);
    gehen
    doc := make(map[string]interface{})
    doc["stringExample"] = "Hello world!"
    doc["booleanExample"] = true
    doc["numberExample"] = 3.14159265
    doc["dateExample"] = time.Now()
    doc["arrayExample"] = []interface{}{5, true, "hello"}
    doc["nullExample"] = nil
    doc["objectExample"] = map[string]interface{}{
    	"a": 5,
    	"b": true,
    }
    
    _, err := client.Collection("data").Doc("one").Set(ctx, doc)
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $data = [
        'stringExample' => 'Hello World',
        'booleanExample' => true,
        'numberExample' => 3.14159265,
        'dateExample' => new Timestamp(new DateTime()),
        'arrayExample' => array(5, true, 'hello'),
        'nullExample' => null,
        'objectExample' => ['a' => 5, 'b' => true],
        'documentReferenceExample' => $db->collection('samples/php/data')->document('two'),
    ];
    $db->collection('samples/php/data')->document('one')->set($data);
    printf('Set multiple data-type data for the one document in the data collection.' . PHP_EOL);
    Einheit
    DocumentReference docRef = db.Collection("data").Document("one");
    Dictionary<string, object> docData = new Dictionary<string, object>
    {
    	{ "stringExample", "Hello World" },
    	{ "booleanExample", false },
    	{ "numberExample", 3.14159265 },
    	{ "nullExample", null },
    	{ "arrayExample", new List<object>() { 5, true, "Hello" } },
    	{ "objectExample", new Dictionary<string, object>
    		{
    			{ "a", 5 },
    			{ "b", true },
    		}
    	},
    };
    
    docRef.SetAsync(docData);
    C#
    DocumentReference docRef = db.Collection("data").Document("one");
    Dictionary<string, object> docData = new Dictionary<string, object>
    {
        { "stringExample", "Hello World" },
        { "booleanExample", false },
        { "numberExample", 3.14159265 },
        { "nullExample", null },
    };
    
    ArrayList arrayExample = new ArrayList();
    arrayExample.Add(5);
    arrayExample.Add(true);
    arrayExample.Add("Hello");
    docData.Add("arrayExample", arrayExample);
    
    Dictionary<string, object> objectExample = new Dictionary<string, object>
    {
        { "a", 5 },
        { "b", true },
    };
    docData.Add("objectExample", objectExample);
    
    await docRef.SetAsync(docData);
    Rubin
    doc_ref = firestore.doc "#{collection_path}/one"
    
    data = {
      stringExample:  "Hello, World!",
      booleanExample: true,
      numberExample:  3.14159265,
      dateExample:    DateTime.now,
      arrayExample:   [5, true, "hello"],
      nullExample:    nil,
      objectExample:  {
        a: 5,
        b: true
      }
    }
    
    doc_ref.set data

    Benutzerdefinierte Objekte

    Die Verwendung von Map oder Dictionary Objekten zur Darstellung Ihrer Dokumente ist oft nicht sehr praktisch, daher unterstützt Cloud Firestore das Schreiben von Dokumenten mit benutzerdefinierten Klassen. Cloud Firestore konvertiert die Objekte in unterstützte Datentypen.

    Mit benutzerdefinierten Klassen könnten Sie das ursprüngliche Beispiel wie gezeigt umschreiben:

    Web version 9

    class City {
        constructor (name, state, country ) {
            this.name = name;
            this.state = state;
            this.country = country;
        }
        toString() {
            return this.name + ', ' + this.state + ', ' + this.country;
        }
    }
    
    // Firestore data converter
    const cityConverter = {
        toFirestore: (city) => {
            return {
                name: city.name,
                state: city.state,
                country: city.country
                };
        },
        fromFirestore: (snapshot, options) => {
            const data = snapshot.data(options);
            return new City(data.name, data.state, data.country);
        }
    };

    Web version 8

    class City {
        constructor (name, state, country ) {
            this.name = name;
            this.state = state;
            this.country = country;
        }
        toString() {
            return this.name + ', ' + this.state + ', ' + this.country;
        }
    }
    
    // Firestore data converter
    var cityConverter = {
        toFirestore: function(city) {
            return {
                name: city.name,
                state: city.state,
                country: city.country
                };
        },
        fromFirestore: function(snapshot, options){
            const data = snapshot.data(options);
            return new City(data.name, data.state, data.country);
        }
    };
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    public struct City: Codable {
    
        let name: String
        let state: String?
        let country: String?
        let isCapital: Bool?
        let population: Int64?
    
        enum CodingKeys: String, CodingKey {
            case name
            case state
            case country
            case isCapital = "capital"
            case population
        }
    
    }
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // This isn't supported in Objective-C.
      

    Kotlin+KTX

    data class City(
        val name: String? = null,
        val state: String? = null,
        val country: String? = null,
        @field:JvmField // use this annotation if your Boolean field is prefixed with 'is'
        val isCapital: Boolean? = null,
        val population: Long? = null,
        val regions: List<String>? = null
    )
    

    Java

    Jede benutzerdefinierte Klasse muss über einen öffentlichen Konstruktor verfügen, der keine Argumente annimmt. Außerdem muss die Klasse einen öffentlichen Getter für jede Eigenschaft enthalten.

    public class City {
    
    
        private String name;
        private String state;
        private String country;
        private boolean capital;
        private long population;
        private List<String> regions;
    
        public City() {}
    
        public City(String name, String state, String country, boolean capital, long population, List<String> regions) {
            // ...
        }
    
        public String getName() {
            return name;
        }
    
        public String getState() {
            return state;
        }
    
        public String getCountry() {
            return country;
        }
    
        public boolean isCapital() {
            return capital;
        }
    
        public long getPopulation() {
            return population;
        }
    
        public List<String> getRegions() {
            return regions;
        }
    
    }
    

    Dart

    class City {
      final String? name;
      final String? state;
      final String? country;
      final bool? capital;
      final int? population;
      final List<String>? regions;
    
      City({
        this.name,
        this.state,
        this.country,
        this.capital,
        this.population,
        this.regions,
      });
    
      factory City.fromFirestore(
        DocumentSnapshot<Map<String, dynamic>> snapshot,
        SnapshotOptions? options,
      ) {
        final data = snapshot.data();
        return City(
          name: data?['name'],
          state: data?['state'],
          country: data?['country'],
          capital: data?['capital'],
          population: data?['population'],
          regions:
              data?['regions'] is Iterable ? List.from(data?['regions']) : null,
        );
      }
    
      Map<String, dynamic> toFirestore() {
        return {
          if (name != null) "name": name,
          if (state != null) "state": state,
          if (country != null) "country": country,
          if (capital != null) "capital": capital,
          if (population != null) "population": population,
          if (regions != null) "regions": regions,
        };
      }
    }
    Java
    public City() {
      // Must have a public no-argument constructor
    }
    
    // Initialize all fields of a city
    public City(
        String name,
        String state,
        String country,
        Boolean capital,
        Long population,
        List<String> regions) {
      this.name = name;
      this.state = state;
      this.country = country;
      this.capital = capital;
      this.population = population;
      this.regions = regions;
    }
    Python
    class City(object):
        def __init__(self, name, state, country, capital=False, population=0,
                     regions=[]):
            self.name = name
            self.state = state
            self.country = country
            self.capital = capital
            self.population = population
            self.regions = regions
    
        @staticmethod
        def from_dict(source):
            # ...
    
        def to_dict(self):
            # ...
    
        def __repr__(self):
            return (
                f'City(\
                    name={self.name}, \
                    country={self.country}, \
                    population={self.population}, \
                    capital={self.capital}, \
                    regions={self.regions}\
                )'
            )

    Python

    class City(object):
        def __init__(self, name, state, country, capital=False, population=0, regions=[]):
            self.name = name
            self.state = state
            self.country = country
            self.capital = capital
            self.population = population
            self.regions = regions
    
        @staticmethod
        def from_dict(source):
            # ...
    
        def to_dict(self):
            # ...
    
        def __repr__(self):
            return f"City(\
                    name={self.name}, \
                    country={self.country}, \
                    population={self.population}, \
                    capital={self.capital}, \
                    regions={self.regions}\
                )"
    
    C++
    // This is not yet supported.
    
    Node.js
    // Node.js uses JavaScript objects
    
    gehen
    
    // City represents a city.
    type City struct {
    	Name       string   `firestore:"name,omitempty"`
    	State      string   `firestore:"state,omitempty"`
    	Country    string   `firestore:"country,omitempty"`
    	Capital    bool     `firestore:"capital,omitempty"`
    	Population int64    `firestore:"population,omitempty"`
    	Regions    []string `firestore:"regions,omitempty"`
    }
    
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    class City
    {
        /* var string */
        public $name;
        /* var string */
        public $state;
        /* var string */
        public $country;
        /* var bool */
        public $capital;
        /* var int */
        public $population;
        /* var array */
        public $regions;
    
        public function __construct(
            string $name,
            string $state,
            string $country,
            bool $capital = false,
            int $population = 0,
            array $regions = []
        ) {
            $this->name = $name;
            $this->state = $state;
            $this->country = $country;
            $this->capital = $capital;
            $this->population = $population;
            $this->regions = $regions;
        }
    
        public static function fromArray(array $source): City
        {
            // implementation of fromArray is excluded for brevity
            # ...
        }
    
        public function toArray(): array
        {
            // implementation of toArray is excluded for brevity
            # ...
        }
    
        public function __toString()
        {
            // implementation of __toString is excluded for brevity
            # ...
        }
    }
    
    Einheit
    [FirestoreData]
    public class City
    {
    	[FirestoreProperty]
    	public string Name { get; set; }
    
    	[FirestoreProperty]
    	public string State { get; set; }
    
    	[FirestoreProperty]
    	public string Country { get; set; }
    
    	[FirestoreProperty]
    	public bool Capital { get; set; }
    
    	[FirestoreProperty]
    	public long Population { get; set; }
    }
    C#
    [FirestoreData]
    public class City
    {
        [FirestoreProperty]
        public string Name { get; set; }
    
        [FirestoreProperty]
        public string State { get; set; }
    
        [FirestoreProperty]
        public string Country { get; set; }
    
        [FirestoreProperty]
        public bool Capital { get; set; }
    
        [FirestoreProperty]
        public long Population { get; set; }
    }
    Rubin
    // This isn't supported in Ruby
    

    Web version 9

    import { doc, setDoc } from "firebase/firestore"; 
    
    // Set with cityConverter
    const ref = doc(db, "cities", "LA").withConverter(cityConverter);
    await setDoc(ref, new City("Los Angeles", "CA", "USA"));

    Web version 8

    // Set with cityConverter
    db.collection("cities").doc("LA")
      .withConverter(cityConverter)
      .set(new City("Los Angeles", "CA", "USA"));
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    let city = City(name: "Los Angeles",
                    state: "CA",
                    country: "USA",
                    isCapital: false,
                    population: 5000000)
    
    do {
        try db.collection("cities").document("LA").setData(from: city)
    } catch let error {
        print("Error writing city to Firestore: \(error)")
    }
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // This isn't supported in Objective-C.
      

    Kotlin+KTX

    val city = City("Los Angeles", "CA", "USA",
            false, 5000000L, listOf("west_coast", "socal"))
    db.collection("cities").document("LA").set(city)
    

    Java

    City city = new City("Los Angeles", "CA", "USA",
            false, 5000000L, Arrays.asList("west_coast", "sorcal"));
    db.collection("cities").document("LA").set(city);
    

    Dart

    final city = City(
      name: "Los Angeles",
      state: "CA",
      country: "USA",
      capital: false,
      population: 5000000,
      regions: ["west_coast", "socal"],
    );
    final docRef = db
        .collection("cities")
        .withConverter(
          fromFirestore: City.fromFirestore,
          toFirestore: (City city, options) => city.toFirestore(),
        )
        .doc("LA");
    await docRef.set(city);
    Java
    City city =
        new City("Los Angeles", "CA", "USA", false, 3900000L, Arrays.asList("west_coast", "socal"));
    ApiFuture<WriteResult> future = db.collection("cities").document("LA").set(city);
    // block on response if required
    System.out.println("Update time : " + future.get().getUpdateTime());
    Python
    city = City(name=u'Los Angeles', state=u'CA', country=u'USA')
    db.collection(u'cities').document(u'LA').set(city.to_dict())

    Python

    city = City(name="Los Angeles", state="CA", country="USA")
    await db.collection("cities").document("LA").set(city.to_dict())
    C++
    // This is not yet supported.
    
    Node.js
    // Node.js uses JavaScript objects
    
    gehen
    city := City{
    	Name:    "Los Angeles",
    	Country: "USA",
    }
    _, err := client.Collection("cities").Doc("LA").Set(ctx, city)
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP
    // This isn't supported in PHP.
    
    Einheit
    DocumentReference docRef = db.Collection("cities").Document("LA");
    City city = new City
    {
    	Name = "Los Angeles",
    	State = "CA",
    	Country = "USA",
    	Capital = false,
    	Population = 3900000L
    };
    docRef.SetAsync(city);
    C#
    DocumentReference docRef = db.Collection("cities").Document("LA");
    City city = new City
    {
        Name = "Los Angeles",
        State = "CA",
        Country = "USA",
        Capital = false,
        Population = 3900000L
    };
    await docRef.SetAsync(city);
    Rubin
    // This isn't supported in Ruby.
    

    Fügen Sie ein Dokument hinzu

    Wenn Sie set() verwenden, um ein Dokument zu erstellen, müssen Sie eine ID für das zu erstellende Dokument angeben. Zum Beispiel:

    Web version 9

    import { doc, setDoc } from "firebase/firestore"; 
    
    await setDoc(doc(db, "cities", "new-city-id"), data);

    Web version 8

    db.collection("cities").doc("new-city-id").set(data);
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    db.collection("cities").document("new-city-id").setData(data)
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    [[[self.db collectionWithPath:@"cities"] documentWithPath:@"new-city-id"]
        setData:data];

    Kotlin+KTX

    db.collection("cities").document("new-city-id").set(data)
    

    Java

    db.collection("cities").document("new-city-id").set(data);
    

    Dart

    db.collection("cities").doc("new-city-id").set({"name": "Chicago"});
    Java
    db.collection("cities").document("new-city-id").set(data);
    Python
    db.collection(u'cities').document(u'new-city-id').set(data)

    Python

    await db.collection("cities").document("new-city-id").set(data)
    C++
    db->Collection("cities").Document("SF").Set({/*some data*/});
    Node.js
    await db.collection('cities').doc('new-city-id').set(data);
    gehen
    _, err := client.Collection("cities").Doc("new-city-id").Set(ctx, data)
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $db->collection('samples/php/cities')->document('new-city-id')->set($data);
    Einheit
    db.Collection("cities").Document("new-city-id").SetAsync(city);
    C#
    await db.Collection("cities").Document("new-city-id").SetAsync(city);
    Rubin
    city_ref = firestore.doc "#{collection_path}/new-city-id"
    city_ref.set data

    Aber manchmal gibt es keine aussagekräftige ID für das Dokument, und es ist bequemer, Cloud Firestore automatisch eine ID für Sie generieren zu lassen. Sie können dies tun, indem Sie die folgenden sprachspezifischen add() -Methoden aufrufen:

    Web version 9

    Verwenden Sie die Methode addDoc() :

    import { collection, addDoc } from "firebase/firestore"; 
    
    // Add a new document with a generated id.
    const docRef = await addDoc(collection(db, "cities"), {
      name: "Tokyo",
      country: "Japan"
    });
    console.log("Document written with ID: ", docRef.id);

    Web version 8

    Verwenden Sie die Methode add() :

    // Add a new document with a generated id.
    db.collection("cities").add({
        name: "Tokyo",
        country: "Japan"
    })
    .then((docRef) => {
        console.log("Document written with ID: ", docRef.id);
    })
    .catch((error) => {
        console.error("Error adding document: ", error);
    });
    Schnell

    Verwenden Sie die Methode addDocument() :

    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Add a new document with a generated id.
    var ref: DocumentReference? = nil
    ref = db.collection("cities").addDocument(data: [
        "name": "Tokyo",
        "country": "Japan"
    ]) { err in
        if let err = err {
            print("Error adding document: \(err)")
        } else {
            print("Document added with ID: \(ref!.documentID)")
        }
    }
    Ziel c

    Verwenden Sie die Methode addDocumentWithData:

    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Add a new document with a generated id.
    __block FIRDocumentReference *ref =
        [[self.db collectionWithPath:@"cities"] addDocumentWithData:@{
          @"name": @"Tokyo",
          @"country": @"Japan"
        } completion:^(NSError * _Nullable error) {
          if (error != nil) {
            NSLog(@"Error adding document: %@", error);
          } else {
            NSLog(@"Document added with ID: %@", ref.documentID);
          }
        }];

    Kotlin+KTX

    Verwenden Sie die Methode add() :

    // Add a new document with a generated id.
    val data = hashMapOf(
            "name" to "Tokyo",
            "country" to "Japan"
    )
    
    db.collection("cities")
        .add(data)
        .addOnSuccessListener { documentReference ->
            Log.d(TAG, "DocumentSnapshot written with ID: ${documentReference.id}")
        }
        .addOnFailureListener { e ->
            Log.w(TAG, "Error adding document", e)
        }
    

    Java

    Verwenden Sie die Methode add() :

    // Add a new document with a generated id.
    Map<String, Object> data = new HashMap<>();
    data.put("name", "Tokyo");
    data.put("country", "Japan");
    
    db.collection("cities")
            .add(data)
            .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
                @Override
                public void onSuccess(DocumentReference documentReference) {
                    Log.d(TAG, "DocumentSnapshot written with ID: " + documentReference.getId());
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.w(TAG, "Error adding document", e);
                }
            });
    

    Dart

    Verwenden Sie die Methode add() :

    // Add a new document with a generated id.
    final data = {"name": "Tokyo", "country": "Japan"};
    
    db.collection("cities").add(data).then((documentSnapshot) =>
        print("Added Data with ID: ${documentSnapshot.id}"));
    Java

    Verwenden Sie die Methode add() :

    // Add document data with auto-generated id.
    Map<String, Object> data = new HashMap<>();
    data.put("name", "Tokyo");
    data.put("country", "Japan");
    ApiFuture<DocumentReference> addedDocRef = db.collection("cities").add(data);
    System.out.println("Added document with ID: " + addedDocRef.get().getId());
    Python

    Verwenden Sie die Methode add() :

    city = {
        u'name': u'Tokyo',
        u'country': u'Japan'
    }
    update_time, city_ref = db.collection(u'cities').add(city)
    print(f'Added document with id {city_ref.id}')

    Python

    Verwenden Sie die Methode add() :

    city = City(name="Tokyo", state=None, country="Japan")
    await db.collection("cities").add(city.to_dict())
    C++

    Verwenden Sie die Methode Add() :

    db->Collection("cities").Add({/*some data*/});
    Node.js

    Verwenden Sie die Methode add() :

    // Add a new document with a generated id.
    const res = await db.collection('cities').add({
      name: 'Tokyo',
      country: 'Japan'
    });
    
    console.log('Added document with ID: ', res.id);
    gehen

    Verwenden Sie die Methode Add() :

    _, _, err := client.Collection("cities").Add(ctx, map[string]interface{}{
    	"name":    "Tokyo",
    	"country": "Japan",
    })
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    Verwenden Sie die Methode add() :

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $data = [
        'name' => 'Tokyo',
        'country' => 'Japan'
    ];
    $addedDocRef = $db->collection('samples/php/cities')->add($data);
    printf('Added document with ID: %s' . PHP_EOL, $addedDocRef->id());
    Einheit

    Verwenden Sie die Methode AddAsync() :

    Dictionary<string, object> city = new Dictionary<string, object>
    {
    	{ "Name", "Tokyo" },
    	{ "Country", "Japan" }
    };
    db.Collection("cities").AddAsync(city).ContinueWithOnMainThread(task => {
    	DocumentReference addedDocRef = task.Result;
    	Debug.Log(String.Format("Added document with ID: {0}.", addedDocRef.Id));
    });
    C#

    Verwenden Sie die Methode AddAsync() :

    Dictionary<string, object> city = new Dictionary<string, object>
    {
        { "Name", "Tokyo" },
        { "Country", "Japan" }
    };
    DocumentReference addedDocRef = await db.Collection("cities").AddAsync(city);
    Console.WriteLine("Added document with ID: {0}.", addedDocRef.Id);
    Rubin

    Verwenden Sie die Methode add() :

    data = {
      name:    "Tokyo",
      country: "Japan"
    }
    
    cities_ref = firestore.col collection_path
    
    added_doc_ref = cities_ref.add data
    puts "Added document with ID: #{added_doc_ref.document_id}."

    In einigen Fällen kann es sinnvoll sein, eine Dokumentreferenz mit einer automatisch generierten ID zu erstellen und die Referenz später zu verwenden. Für diesen Anwendungsfall können Sie doc() aufrufen:

    Web version 9

    import { collection, doc, setDoc } from "firebase/firestore"; 
    
    // Add a new document with a generated id
    const newCityRef = doc(collection(db, "cities"));
    
    // later...
    await setDoc(newCityRef, data);

    Web version 8

    // Add a new document with a generated id.
    var newCityRef = db.collection("cities").doc();
    
    // later...
    newCityRef.set(data);
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    let newCityRef = db.collection("cities").document()
    
    // later...
    newCityRef.setData([
        // ...
    ])
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    FIRDocumentReference *newCityRef = [[self.db collectionWithPath:@"cities"] documentWithAutoID];
    // later...
    [newCityRef setData:@{ /* ... */ }];

    Kotlin+KTX

    val data = HashMap<String, Any>()
    
    val newCityRef = db.collection("cities").document()
    
    // Later...
    newCityRef.set(data)
    

    Java

    Map<String, Object> data = new HashMap<>();
    
    DocumentReference newCityRef = db.collection("cities").document();
    
    // Later...
    newCityRef.set(data);
    

    Dart

    // Add a new document with a generated id.
    final data = <String, dynamic>{};
    
    final newCityRef = db.collection("cities").doc();
    
    // Later...
    newCityRef.set(data);
    
    Java
    // Add document data after generating an id.
    DocumentReference addedDocRef = db.collection("cities").document();
    System.out.println("Added document with ID: " + addedDocRef.getId());
    
    // later...
    ApiFuture<WriteResult> writeResult = addedDocRef.set(data);
    Python
    new_city_ref = db.collection(u'cities').document()
    
    # later...
    new_city_ref.set({
        # ...
    })

    Python

    new_city_ref = db.collection("cities").document()
    
    # later...
    await new_city_ref.set(
        {
            # ...
        }
    )
    C++
    DocumentReference new_city_ref = db->Collection("cities").Document();
    Node.js
    const newCityRef = db.collection('cities').doc();
    
    // Later...
    const res = await newCityRef.set({
      // ...
    });
    gehen
    ref := client.Collection("cities").NewDoc()
    
    // later...
    _, err := ref.Set(ctx, data)
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $addedDocRef = $db->collection('samples/php/cities')->newDocument();
    printf('Added document with ID: %s' . PHP_EOL, $addedDocRef->id());
    $addedDocRef->set($data);
    Einheit
    DocumentReference addedDocRef = db.Collection("cities").Document();
    Debug.Log(String.Format("Added document with ID: {0}.", addedDocRef.Id));
    addedDocRef.SetAsync(city).ContinueWithOnMainThread(task => {
    	Debug.Log(String.Format(
    		"Added data to the {0} document in the cities collection.", addedDocRef.Id));
    });
    C#
    DocumentReference addedDocRef = db.Collection("cities").Document();
    Console.WriteLine("Added document with ID: {0}.", addedDocRef.Id);
    await addedDocRef.SetAsync(city);
    Rubin
    cities_ref = firestore.col collection_path
    
    added_doc_ref = cities_ref.doc
    puts "Added document with ID: #{added_doc_ref.document_id}."
    
    added_doc_ref.set data

    Hinter den Kulissen sind .add(...) und .doc().set(...) völlig gleichwertig, sodass Sie verwenden können, was bequemer ist.

    Aktualisieren Sie ein Dokument

    Um einige Felder eines Dokuments zu aktualisieren, ohne das gesamte Dokument zu überschreiben, verwenden Sie die folgenden sprachspezifischen update() -Methoden:

    Web version 9

    Verwenden Sie die Methode updateDoc() :

    import { doc, updateDoc } from "firebase/firestore";
    
    const washingtonRef = doc(db, "cities", "DC");
    
    // Set the "capital" field of the city 'DC'
    await updateDoc(washingtonRef, {
      capital: true
    });

    Web version 8

    Verwenden Sie die Methode update() :

    var washingtonRef = db.collection("cities").doc("DC");
    
    // Set the "capital" field of the city 'DC'
    return washingtonRef.update({
        capital: true
    })
    .then(() => {
        console.log("Document successfully updated!");
    })
    .catch((error) => {
        // The document probably doesn't exist.
        console.error("Error updating document: ", error);
    });
    Schnell

    Verwenden Sie die Methode updateData() :

    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    let washingtonRef = db.collection("cities").document("DC")
    
    // Set the "capital" field of the city 'DC'
    washingtonRef.updateData([
        "capital": true
    ]) { err in
        if let err = err {
            print("Error updating document: \(err)")
        } else {
            print("Document successfully updated")
        }
    }
    Ziel c

    Verwenden Sie die Methode updateData:

    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    FIRDocumentReference *washingtonRef =
        [[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"];
    // Set the "capital" field of the city
    [washingtonRef updateData:@{
      @"capital": @YES
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error updating document: %@", error);
      } else {
        NSLog(@"Document successfully updated");
      }
    }];

    Kotlin+KTX

    Verwenden Sie die Methode update() :

    val washingtonRef = db.collection("cities").document("DC")
    
    // Set the "isCapital" field of the city 'DC'
    washingtonRef
            .update("capital", true)
            .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully updated!") }
            .addOnFailureListener { e -> Log.w(TAG, "Error updating document", e) }
    

    Java

    Verwenden Sie die Methode update() :

    DocumentReference washingtonRef = db.collection("cities").document("DC");
    
    // Set the "isCapital" field of the city 'DC'
    washingtonRef
            .update("capital", true)
            .addOnSuccessListener(new OnSuccessListener<Void>() {
                @Override
                public void onSuccess(Void aVoid) {
                    Log.d(TAG, "DocumentSnapshot successfully updated!");
                }
            })
            .addOnFailureListener(new OnFailureListener() {
                @Override
                public void onFailure(@NonNull Exception e) {
                    Log.w(TAG, "Error updating document", e);
                }
            });
    

    Dart

    Verwenden Sie die Methode update() :

    final washingtonRef = db.collection("cites").doc("DC");
    washingtonRef.update({"capital": true}).then(
        (value) => print("DocumentSnapshot successfully updated!"),
        onError: (e) => print("Error updating document $e"));
    Java

    Verwenden Sie die Methode update() :

    // Update an existing document
    DocumentReference docRef = db.collection("cities").document("DC");
    
    // (async) Update one field
    ApiFuture<WriteResult> future = docRef.update("capital", true);
    
    // ...
    WriteResult result = future.get();
    System.out.println("Write result: " + result);
    Python

    Verwenden Sie die Methode update() :

    city_ref = db.collection(u'cities').document(u'DC')
    
    # Set the capital field
    city_ref.update({u'capital': True})

    Python

    Verwenden Sie die Methode update() :

    city_ref = db.collection("cities").document("DC")
    
    # Set the capital field
    await city_ref.update({"capital": True})
    C++

    Verwenden Sie die Methode Update() :

    DocumentReference washington_ref = db->Collection("cities").Document("DC");
    // Set the "capital" field of the city "DC".
    washington_ref.Update({{"capital", FieldValue::Boolean(true)}});
    Node.js

    Verwenden Sie die Methode update() :

    const cityRef = db.collection('cities').doc('DC');
    
    // Set the 'capital' field of the city
    const res = await cityRef.update({capital: true});
    gehen

    Verwenden Sie die Methode Update() :

    _, err = client.Collection("cities").Doc("DC").Update(ctx, []firestore.Update{
    	{
    		Path:  "capital",
    		Value: true,
    	},
    })
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    Verwenden Sie die Methode update() :

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $cityRef = $db->collection('samples/php/cities')->document('DC');
    $cityRef->update([
        ['path' => 'capital', 'value' => true]
    ]);
    Einheit

    Verwenden Sie die Methode UpdateAsync() :

    DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
    Dictionary<string, object> updates = new Dictionary<string, object>
    {
    	{ "Capital", false }
    };
    
    cityRef.UpdateAsync(updates).ContinueWithOnMainThread(task => {
    	Debug.Log(
    		"Updated the Capital field of the new-city-id document in the cities collection.");
    });
    // You can also update a single field with: cityRef.UpdateAsync("Capital", false);
    C#

    Verwenden Sie die Methode UpdateAsync() :

    DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
    Dictionary<string, object> updates = new Dictionary<string, object>
    {
        { "Capital", false }
    };
    await cityRef.UpdateAsync(updates);
    
    // You can also update a single field with: await cityRef.UpdateAsync("Capital", false);
    Rubin

    Verwenden Sie die Methode update() :

    city_ref = firestore.doc "#{collection_path}/DC"
    city_ref.update({ capital: true })

    Server-Zeitstempel

    Sie können ein Feld in Ihrem Dokument auf einen Serverzeitstempel setzen, der nachverfolgt, wann der Server das Update erhält.

    Web version 9

    import { updateDoc, serverTimestamp } from "firebase/firestore";
    
    const docRef = doc(db, 'objects', 'some-id');
    
    // Update the timestamp field with the value from the server
    const updateTimestamp = await updateDoc(docRef, {
        timestamp: serverTimestamp()
    });

    Web version 8

    var docRef = db.collection('objects').doc('some-id');
    
    // Update the timestamp field with the value from the server
    var updateTimestamp = docRef.update({
        timestamp: firebase.firestore.FieldValue.serverTimestamp()
    });
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    db.collection("objects").document("some-id").updateData([
        "lastUpdated": FieldValue.serverTimestamp(),
    ]) { err in
        if let err = err {
            print("Error updating document: \(err)")
        } else {
            print("Document successfully updated")
        }
    }
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    [[[self.db collectionWithPath:@"objects"] documentWithPath:@"some-id"] updateData:@{
      @"lastUpdated": [FIRFieldValue fieldValueForServerTimestamp]
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error updating document: %@", error);
      } else {
        NSLog(@"Document successfully updated");
      }
    }];

    Kotlin+KTX

    // If you're using custom Kotlin objects in Android, add an @ServerTimestamp
    // annotation to a Date field for your custom object classes. This indicates
    // that the Date field should be treated as a server timestamp by the object mapper.
    val docRef = db.collection("objects").document("some-id")
    
    // Update the timestamp field with the value from the server
    val updates = hashMapOf<String, Any>(
            "timestamp" to FieldValue.serverTimestamp()
    )
    
    docRef.update(updates).addOnCompleteListener { }
    

    Java

    // If you're using custom Java objects in Android, add an @ServerTimestamp
    // annotation to a Date field for your custom object classes. This indicates
    // that the Date field should be treated as a server timestamp by the object mapper.
    DocumentReference docRef = db.collection("objects").document("some-id");
    
    // Update the timestamp field with the value from the server
    Map<String,Object> updates = new HashMap<>();
    updates.put("timestamp", FieldValue.serverTimestamp());
    
    docRef.update(updates).addOnCompleteListener(new OnCompleteListener<Void>() {
        // ...
        // ...
    

    Dart

    final docRef = db.collection("objects").doc("some-id");
    final updates = <String, dynamic>{
      "timestamp": FieldValue.serverTimestamp(),
    };
    
    docRef.update(updates).then(
        (value) => print("DocumentSnapshot successfully updated!"),
        onError: (e) => print("Error updating document $e"));
    Java
    DocumentReference docRef = db.collection("objects").document("some-id");
    // Update the timestamp field with the value from the server
    ApiFuture<WriteResult> writeResult = docRef.update("timestamp", FieldValue.serverTimestamp());
    System.out.println("Update time : " + writeResult.get());
    Python
    city_ref = db.collection(u'objects').document(u'some-id')
    city_ref.update({
        u'timestamp': firestore.SERVER_TIMESTAMP
    })

    Python

    city_ref = db.collection("objects").document("some-id")
    await city_ref.update({"timestamp": firestore.SERVER_TIMESTAMP})
    C++
    DocumentReference doc_ref = db->Collection("objects").Document("some-id");
    doc_ref.Update({{"timestamp", FieldValue::ServerTimestamp()}})
        .OnCompletion([](const Future<void>& future) {
          // ...
        });
    Node.js
    // Create a document reference
    const docRef = db.collection('objects').doc('some-id');
    
    // Update the timestamp field with the value from the server
    const res = await docRef.update({
      timestamp: FieldValue.serverTimestamp()
    });
    gehen
    _, err := client.Collection("objects").Doc("some-id").Set(ctx, map[string]interface{}{
    	"timestamp": firestore.ServerTimestamp,
    }, firestore.MergeAll)
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $docRef = $db->collection('samples/php/objects')->document('some-id');
    $docRef->update([
        ['path' => 'timestamp', 'value' => FieldValue::serverTimestamp()]
    ]);
    Einheit
    DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
    cityRef.UpdateAsync("Timestamp", FieldValue.ServerTimestamp)
    	.ContinueWithOnMainThread(task => {
    		Debug.Log(
    			"Updated the Timestamp field of the new-city-id document in the cities "
    			+ "collection.");
    	});
    C#
    DocumentReference cityRef = db.Collection("cities").Document("new-city-id");
    await cityRef.UpdateAsync("Timestamp", Timestamp.GetCurrentTimestamp());
    Rubin
    city_ref = firestore.doc "#{collection_path}/new-city-id"
    city_ref.update({ timestamp: firestore.field_server_time })

    Beim Aktualisieren mehrerer Zeitstempelfelder innerhalb einer Transaktion erhält jedes Feld denselben Serverzeitstempelwert.

    Felder in verschachtelten Objekten aktualisieren

    Wenn Ihr Dokument verschachtelte Objekte enthält, können Sie die "Punktnotation" verwenden, um auf verschachtelte Felder innerhalb des Dokuments zu verweisen, wenn Sie update() aufrufen:

    Web version 9

    import { doc, setDoc, updateDoc } from "firebase/firestore"; 
    
    // Create an initial document to update.
    const frankDocRef = doc(db, "users", "frank");
    await setDoc(frankDocRef, {
        name: "Frank",
        favorites: { food: "Pizza", color: "Blue", subject: "recess" },
        age: 12
    });
    
    // To update age and favorite color:
    await updateDoc(frankDocRef, {
        "age": 13,
        "favorites.color": "Red"
    });

    Web version 8

    // Create an initial document to update.
    var frankDocRef = db.collection("users").doc("frank");
    frankDocRef.set({
        name: "Frank",
        favorites: { food: "Pizza", color: "Blue", subject: "recess" },
        age: 12
    });
    
    // To update age and favorite color:
    db.collection("users").doc("frank").update({
        "age": 13,
        "favorites.color": "Red"
    })
    .then(() => {
        console.log("Document successfully updated!");
    });
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Create an initial document to update.
    let frankDocRef = db.collection("users").document("frank")
    frankDocRef.setData([
        "name": "Frank",
        "favorites": [ "food": "Pizza", "color": "Blue", "subject": "recess" ],
        "age": 12
        ])
    
    // To update age and favorite color:
    db.collection("users").document("frank").updateData([
        "age": 13,
        "favorites.color": "Red"
    ]) { err in
        if let err = err {
            print("Error updating document: \(err)")
        } else {
            print("Document successfully updated")
        }
    }
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    // Create an initial document to update.
    FIRDocumentReference *frankDocRef =
        [[self.db collectionWithPath:@"users"] documentWithPath:@"frank"];
    [frankDocRef setData:@{
      @"name": @"Frank",
      @"favorites": @{
        @"food": @"Pizza",
        @"color": @"Blue",
        @"subject": @"recess"
      },
      @"age": @12
    }];
    // To update age and favorite color:
    [frankDocRef updateData:@{
      @"age": @13,
      @"favorites.color": @"Red",
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error updating document: %@", error);
      } else {
        NSLog(@"Document successfully updated");
      }
    }];

    Kotlin+KTX

    // Assume the document contains:
    // {
    //   name: "Frank",
    //   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
    //   age: 12
    // }
    //
    // To update age and favorite color:
    db.collection("users").document("frank")
            .update(mapOf(
                    "age" to 13,
                    "favorites.color" to "Red"
            ))
    

    Java

    // Assume the document contains:
    // {
    //   name: "Frank",
    //   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
    //   age: 12
    // }
    //
    // To update age and favorite color:
    db.collection("users").document("frank")
            .update(
                    "age", 13,
                    "favorites.color", "Red"
            );
    

    Dart

    // Assume the document contains:
    // {
    //   name: "Frank",
    //   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
    //   age: 12
    // }
    db
        .collection("users")
        .doc("frank")
        .update({"age": 13, "favorites.color": "Red"});
    Java
    // Create an initial document to update
    DocumentReference frankDocRef = db.collection("users").document("frank");
    Map<String, Object> initialData = new HashMap<>();
    initialData.put("name", "Frank");
    initialData.put("age", 12);
    
    Map<String, Object> favorites = new HashMap<>();
    favorites.put("food", "Pizza");
    favorites.put("color", "Blue");
    favorites.put("subject", "Recess");
    initialData.put("favorites", favorites);
    
    ApiFuture<WriteResult> initialResult = frankDocRef.set(initialData);
    // Confirm that data has been successfully saved by blocking on the operation
    initialResult.get();
    
    // Update age and favorite color
    Map<String, Object> updates = new HashMap<>();
    updates.put("age", 13);
    updates.put("favorites.color", "Red");
    
    // Async update document
    ApiFuture<WriteResult> writeResult = frankDocRef.update(updates);
    // ...
    System.out.println("Update time : " + writeResult.get().getUpdateTime());
    Python
    # Create an initial document to update
    frank_ref = db.collection(u'users').document(u'frank')
    frank_ref.set({
        u'name': u'Frank',
        u'favorites': {
            u'food': u'Pizza',
            u'color': u'Blue',
            u'subject': u'Recess'
        },
        u'age': 12
    })
    
    # Update age and favorite color
    frank_ref.update({
        u'age': 13,
        u'favorites.color': u'Red'
    })

    Python

    # Create an initial document to update
    frank_ref = db.collection("users").document("frank")
    await frank_ref.set(
        {
            "name": "Frank",
            "favorites": {"food": "Pizza", "color": "Blue", "subject": "Recess"},
            "age": 12,
        }
    )
    
    # Update age and favorite color
    await frank_ref.update({"age": 13, "favorites.color": "Red"})
    C++
    // Assume the document contains:
    // {
    //   name: "Frank",
    //   favorites: { food: "Pizza", color: "Blue", subject: "recess" }
    //   age: 12
    // }
    //
    // To update age and favorite color:
    db->Collection("users").Document("frank").Update({
        {"age", FieldValue::Integer(13)},
        {"favorites.color", FieldValue::String("red")},
    });
    Node.js
    const initialData = {
      name: 'Frank',
      age: 12,
      favorites: {
        food: 'Pizza',
        color: 'Blue',
        subject: 'recess'
      }
    };
    
    // ...
    const res = await db.collection('users').doc('Frank').update({
      age: 13,
      'favorites.color': 'Red'
    });
    gehen
    initialData := map[string]interface{}{
    	"name": "Frank",
    	"age":  12,
    	"favorites": map[string]interface{}{
    		"food":    "Pizza",
    		"color":   "Blue",
    		"subject": "recess",
    	},
    }
    
    // ...
    
    _, err := client.Collection("users").Doc("frank").Set(ctx, map[string]interface{}{
    	"age": 13,
    	"favorites": map[string]interface{}{
    		"color": "Red",
    	},
    }, firestore.MergeAll)
    if err != nil {
    	// Handle any errors in an appropriate way, such as returning them.
    	log.Printf("An error has occurred: %s", err)
    }
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    // Create an initial document to update
    $frankRef = $db->collection('samples/php/users')->document('frank');
    $frankRef->set([
        'first' => 'Frank',
        'last' => 'Franklin',
        'favorites' => ['food' => 'Pizza', 'color' => 'Blue', 'subject' => 'Recess'],
        'age' => 12
    ]);
    
    // Update age and favorite color
    $frankRef->update([
        ['path' => 'age', 'value' => 13],
        ['path' => 'favorites.color', 'value' => 'Red']
    ]);
    Einheit
    DocumentReference frankDocRef = db.Collection("users").Document("frank");
    Dictionary<string, object> initialData = new Dictionary<string, object>
    {
    	{ "Name", "Frank" },
    	{ "Age", 12 }
    };
    
    Dictionary<string, object> favorites = new Dictionary<string, object>
    {
    	{ "Food", "Pizza" },
    	{ "Color", "Blue" },
    	{ "Subject", "Recess" },
    };
    initialData.Add("Favorites", favorites);
    frankDocRef.SetAsync(initialData).ContinueWithOnMainThread(task => {
    
    	// Update age and favorite color
    	Dictionary<string, object> updates = new Dictionary<string, object>
    	{
    		{ "Age", 13 },
    		{ "Favorites.Color", "Red" },
    	};
    
    	// Asynchronously update the document
    	return frankDocRef.UpdateAsync(updates);
    }).ContinueWithOnMainThread(task => {
    	Debug.Log(
    		"Updated the age and favorite color fields of the Frank document in "
    		+ "the users collection.");
    });
    C#
    DocumentReference frankDocRef = db.Collection("users").Document("frank");
    Dictionary<string, object> initialData = new Dictionary<string, object>
    {
        { "Name", "Frank" },
        { "Age", 12 }
    };
    
    Dictionary<string, object> favorites = new Dictionary<string, object>
    {
        { "Food", "Pizza" },
        { "Color", "Blue" },
        { "Subject", "Recess" },
    };
    initialData.Add("Favorites", favorites);
    await frankDocRef.SetAsync(initialData);
    
    // Update age and favorite color
    Dictionary<string, object> updates = new Dictionary<string, object>
    {
        { "Age", 13 },
        { "Favorites.Color", "Red" },
    };
    
    // Asynchronously update the document
    await frankDocRef.UpdateAsync(updates);
    Rubin
    # Create an initial document to update
    frank_ref = firestore.doc "#{collection_path}/frank"
    frank_ref.set(
      {
        name:      "Frank",
        favorites: {
          food:    "Pizza",
          color:   "Blue",
          subject: "Recess"
        },
        age:       12
      }
    )
    
    # Update age and favorite color
    frank_ref.update({ age: 13, "favorites.color": "Red" })

    Mit der Punktnotation können Sie ein einzelnes verschachteltes Feld aktualisieren, ohne andere verschachtelte Felder zu überschreiben. Wenn Sie ein verschachteltes Feld ohne Punktnotation aktualisieren, überschreiben Sie beispielsweise das gesamte Kartenfeld:

    Netz
    
    // Create our initial doc
    db.collection("users").doc("frank").set({
      name: "Frank",
      favorites: {
        food: "Pizza",
        color: "Blue",
        subject: "Recess"
      },
      age: 12
    }).then(function() {
      console.log("Frank created");
    });
    
    // Update the doc without using dot notation.
    // Notice the map value for favorites.
    db.collection("users").doc("frank").update({
      favorites: {
        food: "Ice Cream"
      }
    }).then(function() {
      console.log("Frank food updated");
    });
    
    /*
    Ending State, favorite.color and favorite.subject are no longer present:
    /users
        /frank
            {
                name: "Frank",
                favorites: {
                    food: "Ice Cream",
                },
                age: 12
            }
     */
    

    Elemente in einem Array aktualisieren

    Wenn Ihr Dokument ein Array-Feld enthält, können Sie arrayUnion() und arrayRemove() verwenden, um Elemente hinzuzufügen und zu entfernen. arrayUnion() fügt Elemente zu einem Array hinzu, aber nur Elemente, die noch nicht vorhanden sind. arrayRemove() entfernt alle Instanzen jedes angegebenen Elements.

    Web version 9

    import { doc, updateDoc, arrayUnion, arrayRemove } from "firebase/firestore";
    
    const washingtonRef = doc(db, "cities", "DC");
    
    // Atomically add a new region to the "regions" array field.
    await updateDoc(washingtonRef, {
        regions: arrayUnion("greater_virginia")
    });
    
    // Atomically remove a region from the "regions" array field.
    await updateDoc(washingtonRef, {
        regions: arrayRemove("east_coast")
    });

    Web version 8

    var washingtonRef = db.collection("cities").doc("DC");
    
    // Atomically add a new region to the "regions" array field.
    washingtonRef.update({
        regions: firebase.firestore.FieldValue.arrayUnion("greater_virginia")
    });
    
    // Atomically remove a region from the "regions" array field.
    washingtonRef.update({
        regions: firebase.firestore.FieldValue.arrayRemove("east_coast")
    });
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    let washingtonRef = db.collection("cities").document("DC")
    
    // Atomically add a new region to the "regions" array field.
    washingtonRef.updateData([
        "regions": FieldValue.arrayUnion(["greater_virginia"])
    ])
    
    // Atomically remove a region from the "regions" array field.
    washingtonRef.updateData([
        "regions": FieldValue.arrayRemove(["east_coast"])
    ])
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    FIRDocumentReference *washingtonRef =
        [[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"];
    
    // Atomically add a new region to the "regions" array field.
    [washingtonRef updateData:@{
      @"regions": [FIRFieldValue fieldValueForArrayUnion:@[@"greater_virginia"]]
    }];
    
    // Atomically remove a new region to the "regions" array field.
    [washingtonRef updateData:@{
      @"regions": [FIRFieldValue fieldValueForArrayRemove:@[@"east_coast"]]
    }];

    Kotlin+KTX

    val washingtonRef = db.collection("cities").document("DC")
    
    // Atomically add a new region to the "regions" array field.
    washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"))
    
    // Atomically remove a region from the "regions" array field.
    washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"))
    

    Java

    DocumentReference washingtonRef = db.collection("cities").document("DC");
    
    // Atomically add a new region to the "regions" array field.
    washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"));
    
    // Atomically remove a region from the "regions" array field.
    washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"));
    

    Dart

    final washingtonRef = db.collection("cities").doc("DC");
    
    // Atomically add a new region to the "regions" array field.
    washingtonRef.update({
      "regions": FieldValue.arrayUnion(["greater_virginia"]),
    });
    
    // Atomically remove a region from the "regions" array field.
    washingtonRef.update({
      "regions": FieldValue.arrayRemove(["east_coast"]),
    });
    Java
    DocumentReference washingtonRef = db.collection("cities").document("DC");
    
    // Atomically add a new region to the "regions" array field.
    ApiFuture<WriteResult> arrayUnion =
        washingtonRef.update("regions", FieldValue.arrayUnion("greater_virginia"));
    System.out.println("Update time : " + arrayUnion.get());
    
    // Atomically remove a region from the "regions" array field.
    ApiFuture<WriteResult> arrayRm =
        washingtonRef.update("regions", FieldValue.arrayRemove("east_coast"));
    System.out.println("Update time : " + arrayRm.get());
    Python
    city_ref = db.collection(u'cities').document(u'DC')
    
    # Atomically add a new region to the 'regions' array field.
    city_ref.update({u'regions': firestore.ArrayUnion([u'greater_virginia'])})
    
    # // Atomically remove a region from the 'regions' array field.
    city_ref.update({u'regions': firestore.ArrayRemove([u'east_coast'])})

    Python

    city_ref = db.collection("cities").document("DC")
    
    # Atomically add a new region to the 'regions' array field.
    await city_ref.update({"regions": firestore.ArrayUnion(["greater_virginia"])})
    
    # // Atomically remove a region from the 'regions' array field.
    await city_ref.update({"regions": firestore.ArrayRemove(["east_coast"])})
    C++
    // This is not yet supported.
    
    Node.js
    // ...
    const washingtonRef = db.collection('cities').doc('DC');
    
    // Atomically add a new region to the "regions" array field.
    const unionRes = await washingtonRef.update({
      regions: FieldValue.arrayUnion('greater_virginia')
    });
    // Atomically remove a region from the "regions" array field.
    const removeRes = await washingtonRef.update({
      regions: FieldValue.arrayRemove('east_coast')
    });
    
    // To add or remove multiple items, pass multiple arguments to arrayUnion/arrayRemove
    const multipleUnionRes = await washingtonRef.update({
      regions: FieldValue.arrayUnion('south_carolina', 'texas')
      // Alternatively, you can use spread operator in ES6 syntax
      // const newRegions = ['south_carolina', 'texas']
      // regions: FieldValue.arrayUnion(...newRegions)
    });
    gehen
    // Not supported yet
    
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $cityRef = $db->collection('samples/php/cities')->document('DC');
    
    // Atomically add a new region to the "regions" array field.
    $cityRef->update([
        ['path' => 'regions', 'value' => FieldValue::arrayUnion(['greater_virginia'])]
    ]);
    
    // Atomically remove a region from the "regions" array field.
    $cityRef->update([
        ['path' => 'regions', 'value' => FieldValue::arrayRemove(['east_coast'])]
    ]);
    Einheit
    // This is not yet supported in the Unity SDK
      
    C#
    DocumentReference washingtonRef = db.Collection("cities").Document("DC");
    
    // Atomically add a new region to the "regions" array field.
    await washingtonRef.UpdateAsync("Regions", FieldValue.ArrayUnion("greater_virginia"));
    
    // Atomically remove a region from the "regions" array field.
    await washingtonRef.UpdateAsync("Regions", FieldValue.ArrayRemove("east_coast"));
    Rubin
    // Not supported yet
    

    Erhöhen Sie einen numerischen Wert

    Sie können einen numerischen Feldwert erhöhen oder verringern, wie im folgenden Beispiel gezeigt. Eine Inkrementoperation erhöht oder verringert den aktuellen Wert eines Felds um den angegebenen Betrag.

    Web version 9

    import { doc, updateDoc, increment } from "firebase/firestore";
    
    const washingtonRef = doc(db, "cities", "DC");
    
    // Atomically increment the population of the city by 50.
    await updateDoc(washingtonRef, {
        population: increment(50)
    });

    Web version 8

    var washingtonRef = db.collection('cities').doc('DC');
    
    // Atomically increment the population of the city by 50.
    washingtonRef.update({
        population: firebase.firestore.FieldValue.increment(50)
    });
    Schnell
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    let washingtonRef = db.collection("cities").document("DC")
    
    // Atomically increment the population of the city by 50.
    // Note that increment() with no arguments increments by 1.
    washingtonRef.updateData([
        "population": FieldValue.increment(Int64(50))
    ])
    Ziel c
    Hinweis: Dieses Produkt ist auf watchOS- und App Clip-Zielen nicht verfügbar.
    FIRDocumentReference *washingtonRef =
        [[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"];
    
    // Atomically increment the population of the city by 50.
    // Note that increment() with no arguments increments by 1.
    [washingtonRef updateData:@{
      @"population": [FIRFieldValue fieldValueForIntegerIncrement:50]
    }];

    Kotlin+KTX

    val washingtonRef = db.collection("cities").document("DC")
    
    // Atomically increment the population of the city by 50.
    washingtonRef.update("population", FieldValue.increment(50))
    

    Java

    DocumentReference washingtonRef = db.collection("cities").document("DC");
    
    // Atomically increment the population of the city by 50.
    washingtonRef.update("population", FieldValue.increment(50));
    

    Dart

    var washingtonRef = db.collection('cities').doc('DC');
    
    // Atomically increment the population of the city by 50.
    washingtonRef.update(
      {"population": FieldValue.increment(50)},
    );
    Java
    DocumentReference washingtonRef = db.collection("cities").document("DC");
    
    // Atomically increment the population of the city by 50.
    final ApiFuture<WriteResult> updateFuture =
        washingtonRef.update("population", FieldValue.increment(50));
    Python
    washington_ref = db.collection(u'cities').document(u'DC')
    
    washington_ref.update({"population": firestore.Increment(50)})

    Python

    washington_ref = db.collection("cities").document("DC")
    
    washington_ref.update({"population": firestore.Increment(50)})
    C++
    // This is not yet supported.
    
    Node.js
    // ...
    const washingtonRef = db.collection('cities').doc('DC');
    
    // Atomically increment the population of the city by 50.
    const res = await washingtonRef.update({
      population: FieldValue.increment(50)
    });
    gehen
    import (
    	"context"
    	"fmt"
    
    	"cloud.google.com/go/firestore"
    )
    
    // updateDocumentIncrement increments the population of the city document in the
    // cities collection by 50.
    func updateDocumentIncrement(projectID, city string) error {
    	// projectID := "my-project"
    
    	ctx := context.Background()
    
    	client, err := firestore.NewClient(ctx, projectID)
    	if err != nil {
    		return fmt.Errorf("firestore.NewClient: %v", err)
    	}
    	defer client.Close()
    
    	dc := client.Collection("cities").Doc(city)
    	_, err = dc.Update(ctx, []firestore.Update{
    		{Path: "population", Value: firestore.Increment(50)},
    	})
    	if err != nil {
    		return fmt.Errorf("Update: %v", err)
    	}
    
    	return nil
    }
    
    PHP

    PHP

    Weitere Informationen zum Installieren und Erstellen eines Cloud Firestore-Clients finden Sie unter Cloud Firestore-Clientbibliotheken .

    $cityRef = $db->collection('samples/php/cities')->document('DC');
    
    // Atomically increment the population of the city by 50.
    $cityRef->update([
        ['path' => 'regions', 'value' => FieldValue::increment(50)]
    ]);
    Einheit
    // This is not yet supported in the Unity SDK.
      
    C#
    DocumentReference washingtonRef = db.Collection("cities").Document("DC");
    
    // Atomically increment the population of the city by 50.
    await washingtonRef.UpdateAsync("Regions", FieldValue.Increment(50));
    Rubin
    city_ref = firestore.doc "#{collection_path}/DC"
    city_ref.update({ population: firestore.field_increment(50) })

    Inkrementoperationen sind nützlich, um Zähler zu implementieren, aber denken Sie daran, dass Sie ein einzelnes Dokument nur einmal pro Sekunde aktualisieren können. Wenn Sie Ihren Zähler über diese Rate hinaus aktualisieren müssen, lesen Sie die Seite Verteilte Zähler .