Cloud Firestore 使用入门

Web 命名空间型 API

1. 按照相关说明将 Firebase 添加到您的 Web 应用。
2. 将 Firebase 库和 Cloud Firestore 库添加到您的应用：

   <script src="https://www.gstatic.com/firebasejs/10.7.0/firebase-app-compat.js"></script>
   <script src="https://www.gstatic.com/firebasejs/10.7.0/firebase-firestore-compat.js"></script>

   Cloud Firestore SDK 也可以作为 npm 软件包提供。

   npm install firebase@10.7.0 --save
   

   您需要手动添加 Firebase 和 Cloud Firestore 库。

   import firebase from "firebase/compat/app";
   // Required for side-effects
   import "firebase/firestore";
   

Web 模块化 API

1. 按照相关说明将 Firebase 添加到您的 Web 应用。
2. Cloud Firestore SDK 可以作为 npm 软件包提供。

   npm install firebase@10.7.0 --save
   

   您需要导入 Firebase 和 Cloud Firestore。

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

iOS+

按照相关说明将 Firebase 添加到您的 Apple 应用。

使用 Swift Package Manager 安装和管理 Firebase 依赖项。

1. 在 Xcode 中打开您的应用项目，依次点击 File（文件）> Swift Packages（Swift 软件包）> Add Package Dependency（添加软件包依赖项）。
2. 出现提示时，添加 Firebase Apple 平台 SDK 代码库：

  https://github.com/firebase/firebase-ios-sdk
  

3. 选择 Firestore 库。
4. 完成之后，Xcode 将会自动开始在后台解析和下载您的依赖项。

Android

1. 按照相关说明将 Firebase 添加到您的 Android 应用。
2. 使用 Firebase Android BoM 在模块（应用级）Gradle 文件（通常是 app/build.gradle.kts 或 app/build.gradle）中声明 Cloud Firestore Android 库的依赖项。

   dependencies {
       // Import the BoM for the Firebase platform
       implementation(platform("com.google.firebase:firebase-bom:32.6.0"))
   
       // Declare the dependency for the Cloud Firestore library
       // When using the BoM, you don't specify versions in Firebase library dependencies
       implementation("com.google.firebase:firebase-firestore")
   }
   

   借助 Firebase Android BoM，可确保您的应用使用的始终是 Firebase Android 库的兼容版本。

   （替代方法） 在不使用 BoM 的情况下声明 Firebase 库依赖项

   如果您选择不使用 Firebase BoM，则必须在每个 Firebase 库的依赖项行中指定相应的库版本。

   请注意，如果您在应用中使用多个 Firebase 库，我们强烈建议您使用 BoM 来管理库版本，从而确保所有版本都兼容。

   dependencies {
       // Declare the dependency for the Cloud Firestore library
       // When NOT using the BoM, you must specify versions in Firebase library dependencies
       implementation("com.google.firebase:firebase-firestore:24.9.1")
   }
   

   是否想要查找 Kotlin 专用的库模块？从 2023 年 10 月发布的版本开始，Kotlin 和 Java 开发者可以依赖于主库模块（如需了解详情，请参阅关于此计划的常见问题解答）。

Dart

1. 在 Flutter 应用中配置并初始化 Firebase（如果尚未执行此操作）。
2. 从 Flutter 项目的根目录运行以下命令，安装该插件：

   flutter pub add cloud_firestore

3. 完成后，重新构建您的 Flutter 应用：

   flutter run

4. 可选：通过添加预编译框架来缩短 iOS 和 macOS 构建时间。

   目前，iOS 版 Firestore SDK 所依赖的代码可能需要长达 5 分钟时间才能在 Xcode 中构建完毕。如需显著缩短构建时间，您可以使用预编译版本，只需将下面的代码添加到 Podfile 的 target 'Runner' do 代码块中即可：

   target 'Runner' do
     pod 'FirebaseFirestore', :git => 'https://github.com/invertase/firestore-ios-sdk-frameworks.git', :tag => '8.15.0'
     # ...
   end

   此外，请确保您已将 CocoaPods 升级到 1.9.1 或更高版本：

   gem install cocoapods

   如需了解详情，请参阅 GitHub 上的问题。

Java

1. 将 Firebase Admin SDK 添加到您的应用中：
   • 使用 Gradle：

     compile 'com.google.firebase:firebase-admin:1.32.0'
     

   • 使用 Maven：

     <dependency>
       <groupId>com.google.firebase</groupId>
       <artifactId>firebase-admin</artifactId>
       <version>1.32.0</version>
     </dependency>
          

2. 按照以下说明在您的环境中使用适当的凭据初始化 Cloud Firestore。

Python

1. 将 Firebase Admin SDK 添加到您的 Python 应用中：

   pip install --upgrade firebase-admin

2. 按照以下说明在您的环境中使用适当的凭据初始化 Cloud Firestore。

C++

1. 按照相关说明将 Firebase 添加到您的 C++ 项目。
2. Android 版 C++ 接口。
• Gradle 依赖项。将以下内容添加到您的模块（应用级）Gradle 文件（通常为 app/build.gradle）：

          android.defaultConfig.externalNativeBuild.cmake {
            arguments "-DFIREBASE_CPP_SDK_DIR=$gradle.firebase_cpp_sdk_dir"
          }
  
          apply from: "$gradle.firebase_cpp_sdk_dir/Android/firebase_dependencies.gradle"
          firebaseCpp.dependencies {
            // earlier entries
            auth
            firestore
          }
          

• 二进制依赖项。同样，建议用来获取二进制依赖项的方法是将以下内容添加到 CMakeLists.txt 文件中：

          add_subdirectory(${FIREBASE_CPP_SDK_DIR} bin/ EXCLUDE_FROM_ALL)
          set(firebase_libs firebase_auth firebase_firestore firebase_app)
          # Replace the target name below with the actual name of your target,
          # for example, "native-lib".
          target_link_libraries(${YOUR_TARGET_NAME_HERE} "${firebase_libs}")
          

3. 如需设置桌面集成，请参阅将 Firebase 添加到您的 C++ 项目。

Unity

1. 按照相关说明将 Firebase 添加到您的 Unity 项目。
2. 使用 Unity 界面配置您的项目以缩减 Android build 的大小。

您必须缩减 build 的大小以避免出现消息 Error while merging dex archives。

• 可在 Player Settings > Android > Publishing Settings > Minify 中找到该选项。
• 这些选项可能会因 Unity 的不同版本而异，因此请参阅官方 Unity 文档和 Firebase Unity Build 调试指南。
• 如果在启用缩减大小后，引用的方法数量仍然超过上限，另一种方法是在以下位置启用 multidex：
  • mainTemplate.gradle（如果启用了 Player Settings 下的 Custom Gradle Template）
  • 模块级 build.gradle 文件（如果您使用 Android Studio 构建导出的项目）。

Node.js

1. 将 Firebase Admin SDK 添加到您的应用中：

   npm install firebase-admin --save

2. 按照以下说明在您的环境中使用适当的凭据初始化 Cloud Firestore。

Go

1. 将 Firebase Admin SDK 添加到您的 Go 应用中：

   go get firebase.google.com/go
   

2. 按照以下说明在您的环境中使用适当的凭据初始化 Cloud Firestore。

PHP

1. Cloud Firestore 服务器客户端库（Java、Node.js、Python、Go、PHP、C# 和 Ruby）使用 Google 应用默认凭据进行身份验证。
   • 如需从开发环境中进行身份验证，请将 GOOGLE_APPLICATION_CREDENTIALS 环境变量设置为指向 JSON 服务账号密钥文件。您可以在 API 控制台的“凭据”页面上创建一个密钥文件。

     export GOOGLE_APPLICATION_CREDENTIALS="path/to/your/keyfile.json"

   • 在生产环境中，如果您使用 Cloud Firestore 所用的同一项目在 App Engine 或 Compute Engine 上运行应用，则无需进行身份验证。否则，请设置服务账号。
2. 安装并启用 PHP 版 gRPC 扩展程序（您在使用客户端库时需用到它）。
3. 将 Cloud Firestore PHP 库添加到您的应用中：

   composer require google/cloud-firestore

C#

1. Cloud Firestore 服务器客户端库（Java、Node.js、Python、Go、PHP、C# 和 Ruby）使用 Google 应用默认凭据进行身份验证。
   • 如需从开发环境中进行身份验证，请将 GOOGLE_APPLICATION_CREDENTIALS 环境变量设置为指向 JSON 服务账号密钥文件。您可以在 API 控制台的“凭据”页面上创建一个密钥文件。

     export GOOGLE_APPLICATION_CREDENTIALS="path/to/your/keyfile.json"

   • 在生产环境中，如果您使用 Cloud Firestore 所用的同一项目在 App Engine 或 Compute Engine 上运行应用，则无需进行身份验证。否则，请设置服务账号。
2. 在您的 .csproj 文件中，将 Cloud Firestore C# 库添加到您的应用中：

   <ItemGroup>
     <PackageReference Include="Google.Cloud.Firestore" Version="1.1.0-beta01" />
   </ItemGroup>

3. 将以下内容添加到 Program.cs 文件：

   using Google.Cloud.Firestore;

Ruby

1. Cloud Firestore 服务器客户端库（Java、Node.js、Python、Go、PHP、C# 和 Ruby）使用 Google 应用默认凭据进行身份验证。
   • 如需从开发环境中进行身份验证，请将 GOOGLE_APPLICATION_CREDENTIALS 环境变量设置为指向 JSON 服务账号密钥文件。您可以在 API 控制台的“凭据”页面上创建一个密钥文件。

     export GOOGLE_APPLICATION_CREDENTIALS="path/to/your/keyfile.json"

   • 在生产环境中，如果您使用 Cloud Firestore 所用的同一项目在 App Engine 或 Compute Engine 上运行应用，则无需进行身份验证。否则，请设置服务账号。
2. 在您的 Gemfile 中，将 Cloud Firestore Ruby 库添加到您的应用中：

   gem "google-cloud-firestore"

3. 使用以下命令从 Gemfile 安装依赖项：

   bundle install

Web 模块化 API

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);

将 FIREBASE_CONFIGURATION 替换为 Web 应用的 firebaseConfig。

如需在设备的网络连接中断时保留数据，请参阅启用离线数据文档。

Web 命名空间型 API

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();

将 FIREBASE_CONFIGURATION 替换为 Web 应用的 firebaseConfig。

如需在设备的网络连接中断时保留数据，请参阅启用离线数据文档。

Swift

import FirebaseCore
import FirebaseFirestore

FirebaseApp.configure()

let db = Firestore.firestore()
AppDelegate.swift

Objective-C

@import FirebaseCore;
@import FirebaseFirestore;

// Use Firebase library to configure APIs
[FIRApp configure];
  

FIRFirestore *defaultFirestore = [FIRFirestore firestore];
AppDelegate.m

Kotlin+KTX

// Access a Cloud Firestore instance from your Activity

val db = Firebase.firestore
DocSnippets.kt

Java

// Access a Cloud Firestore instance from your Activity

FirebaseFirestore db = FirebaseFirestore.getInstance();
DocSnippets.java

Dart

db = FirebaseFirestore.instance;

Java

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();

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

import firebase_admin
from firebase_admin import firestore

# Application Default credentials are automatically created.
app = firebase_admin.initialize_app()
db = firestore.client()
firestore.py

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()
firestore.py

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()
firestore.py

Python

import firebase_admin
from firebase_admin import firestore_async

# Application Default credentials are automatically created.
app = firebase_admin.initialize_app()
db = firestore_async.client()
firestore_async.py

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()
firestore_async.py

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()
firestore_async.py

C++

// Make sure the call to `Create()` happens some time before you call Firestore::GetInstance().
App::Create();
Firestore* db = Firestore::GetInstance();
AppDelegate.mm

Node.js

• 在 Cloud Functions 上初始化

  const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
  const { getFirestore, Timestamp, FieldValue, Filter } = require('firebase-admin/firestore');

  initializeApp();
  
  const db = getFirestore();
  index.js

• 在 Google Cloud 上初始化

  const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
  const { getFirestore, Timestamp, FieldValue, Filter } = require('firebase-admin/firestore');

  initializeApp({
    credential: applicationDefault()
  });
  
  const db = getFirestore();
  index.js

• 在您自己的服务器上初始化

  如需在您自己的服务器上（或其他任何 Node.js 环境中）使用 Firebase Admin SDK，请使用一个服务账号。在 Google Cloud 控制台中，转到 IAM 和管理 > 服务账号。生成一个新的私钥并保存该 JSON 文件。然后使用该文件来初始化 SDK：

  const { initializeApp, applicationDefault, cert } = require('firebase-admin/app');
  const { getFirestore, Timestamp, FieldValue, Filter } = require('firebase-admin/firestore');

  const serviceAccount = require('./path/to/serviceAccountKey.json');
  
  initializeApp({
    credential: cert(serviceAccount)
  });
  
  const db = getFirestore();
  index.js

Go

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()

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

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);
    }
}
setup_client_create.php

Unity

using Firebase.Firestore;
using Firebase.Extensions;

FirebaseFirestore db = FirebaseFirestore.DefaultInstance;

C#

FirestoreDb db = FirestoreDb.Create(project);
Console.WriteLine("Created Cloud Firestore client with project ID: {0}", project);
Program.cs

Ruby

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."
quickstart.rb

Web 模块化 API

import { collection, addDoc } from "firebase/firestore"; 

try {
  const docRef = await addDoc(collection(db, "users"), {
    first: "Ada",
    last: "Lovelace",
    born: 1815
  });
  console.log("Document written with ID: ", docRef.id);
} catch (e) {
  console.error("Error adding document: ", e);
}
add_ada_lovelace.js

Web 命名空间型 API

db.collection("users").add({
    first: "Ada",
    last: "Lovelace",
    born: 1815
})
.then((docRef) => {
    console.log("Document written with ID: ", docRef.id);
})
.catch((error) => {
    console.error("Error adding document: ", error);
});
test.firestore.js

Swift

// Add a new document with a generated ID
var ref: DocumentReference? = nil
ref = db.collection("users").addDocument(data: [
  "first": "Ada",
  "last": "Lovelace",
  "born": 1815
]) { err in
  if let err = err {
    print("Error adding document: \(err)")
  } else {
    print("Document added with ID: \(ref!.documentID)")
  }
}
ViewController.swift

Objective-C

// Add a new document with a generated ID
__block FIRDocumentReference *ref =
    [[self.db collectionWithPath:@"users"] addDocumentWithData:@{
      @"first": @"Ada",
      @"last": @"Lovelace",
      @"born": @1815
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error adding document: %@", error);
      } else {
        NSLog(@"Document added with ID: %@", ref.documentID);
      }
    }];
ViewController.m

Kotlin+KTX

// Create a new user with a first and last name
val user = hashMapOf(
    "first" to "Ada",
    "last" to "Lovelace",
    "born" to 1815,
)

// Add a new document with a generated ID
db.collection("users")
    .add(user)
    .addOnSuccessListener { documentReference ->
        Log.d(TAG, "DocumentSnapshot added with ID: ${documentReference.id}")
    }
    .addOnFailureListener { e ->
        Log.w(TAG, "Error adding document", e)
    }
DocSnippets.kt

Java

// Create a new user with a first and last name
Map<String, Object> user = new HashMap<>();
user.put("first", "Ada");
user.put("last", "Lovelace");
user.put("born", 1815);

// Add a new document with a generated ID
db.collection("users")
        .add(user)
        .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
            @Override
            public void onSuccess(DocumentReference documentReference) {
                Log.d(TAG, "DocumentSnapshot added with ID: " + documentReference.getId());
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error adding document", e);
            }
        });
DocSnippets.java

Dart

// Create a new user with a first and last name
final user = <String, dynamic>{
  "first": "Ada",
  "last": "Lovelace",
  "born": 1815
};

// Add a new document with a generated ID
db.collection("users").add(user).then((DocumentReference doc) =>
    print('DocumentSnapshot added with ID: ${doc.id}'));
firestore.dart

Java

DocumentReference docRef = db.collection("users").document("alovelace");
// Add document data  with id "alovelace" using a hashmap
Map<String, Object> data = new HashMap<>();
data.put("first", "Ada");
data.put("last", "Lovelace");
data.put("born", 1815);
//asynchronously write data
ApiFuture<WriteResult> result = docRef.set(data);
// ...
// result.get() blocks on response
System.out.println("Update time : " + result.get().getUpdateTime());
Quickstart.java

Python

doc_ref = db.collection("users").document("alovelace")
doc_ref.set({"first": "Ada", "last": "Lovelace", "born": 1815})
snippets.py

Python

doc_ref = db.collection("users").document("alovelace")
await doc_ref.set({"first": "Ada", "last": "Lovelace", "born": 1815})
snippets.py

C++

// Add a new document with a generated ID
Future<DocumentReference> user_ref =
    db->Collection("users").Add({{"first", FieldValue::String("Ada")},
                                 {"last", FieldValue::String("Lovelace")},
                                 {"born", FieldValue::Integer(1815)}});

user_ref.OnCompletion([](const Future<DocumentReference>& future) {
  if (future.error() == Error::kErrorOk) {
    std::cout << "DocumentSnapshot added with ID: " << future.result()->id()
              << std::endl;
  } else {
    std::cout << "Error adding document: " << future.error_message() << std::endl;
  }
});
snippets.cpp

Node.js

const docRef = db.collection('users').doc('alovelace');

await docRef.set({
  first: 'Ada',
  last: 'Lovelace',
  born: 1815
});
index.js

Go

_, _, err := client.Collection("users").Add(ctx, map[string]interface{}{
	"first": "Ada",
	"last":  "Lovelace",
	"born":  1815,
})
if err != nil {
	log.Fatalf("Failed adding alovelace: %v", err)
}
main.go

PHP

$docRef = $db->collection('samples/php/users')->document('alovelace');
$docRef->set([
    'first' => 'Ada',
    'last' => 'Lovelace',
    'born' => 1815
]);
printf('Added data to the lovelace document in the users collection.' . PHP_EOL);
setup_dataset.php

Unity

DocumentReference docRef = db.Collection("users").Document("alovelace");
Dictionary<string, object> user = new Dictionary<string, object>
{
	{ "First", "Ada" },
	{ "Last", "Lovelace" },
	{ "Born", 1815 },
};
docRef.SetAsync(user).ContinueWithOnMainThread(task => {
	Debug.Log("Added data to the alovelace document in the users collection.");
});

C#

DocumentReference docRef = db.Collection("users").Document("alovelace");
Dictionary<string, object> user = new Dictionary<string, object>
{
    { "First", "Ada" },
    { "Last", "Lovelace" },
    { "Born", 1815 }
};
await docRef.SetAsync(user);
Program.cs

Ruby

doc_ref = firestore.doc "#{collection_path}/alovelace"

doc_ref.set(
  {
    first: "Ada",
    last:  "Lovelace",
    born:  1815
  }
)

puts "Added data to the alovelace document in the users collection."
quickstart.rb

Web 模块化 API

// Add a second document with a generated ID.
import { addDoc, collection } from "firebase/firestore"; 

try {
  const docRef = await addDoc(collection(db, "users"), {
    first: "Alan",
    middle: "Mathison",
    last: "Turing",
    born: 1912
  });

  console.log("Document written with ID: ", docRef.id);
} catch (e) {
  console.error("Error adding document: ", e);
}
add_alan_turing.js

Web 命名空间型 API

// Add a second document with a generated ID.
db.collection("users").add({
    first: "Alan",
    middle: "Mathison",
    last: "Turing",
    born: 1912
})
.then((docRef) => {
    console.log("Document written with ID: ", docRef.id);
})
.catch((error) => {
    console.error("Error adding document: ", error);
});
test.firestore.js

Swift

// Add a second document with a generated ID.
ref = db.collection("users").addDocument(data: [
  "first": "Alan",
  "middle": "Mathison",
  "last": "Turing",
  "born": 1912
]) { err in
  if let err = err {
    print("Error adding document: \(err)")
  } else {
    print("Document added with ID: \(ref!.documentID)")
  }
}
ViewController.swift

Objective-C

// Add a second document with a generated ID.
__block FIRDocumentReference *ref =
    [[self.db collectionWithPath:@"users"] addDocumentWithData:@{
      @"first": @"Alan",
      @"middle": @"Mathison",
      @"last": @"Turing",
      @"born": @1912
    } completion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error adding document: %@", error);
      } else {
        NSLog(@"Document added with ID: %@", ref.documentID);
      }
    }];
ViewController.m

Kotlin+KTX

// Create a new user with a first, middle, and last name
val user = hashMapOf(
    "first" to "Alan",
    "middle" to "Mathison",
    "last" to "Turing",
    "born" to 1912,
)

// Add a new document with a generated ID
db.collection("users")
    .add(user)
    .addOnSuccessListener { documentReference ->
        Log.d(TAG, "DocumentSnapshot added with ID: ${documentReference.id}")
    }
    .addOnFailureListener { e ->
        Log.w(TAG, "Error adding document", e)
    }
DocSnippets.kt

Java

// Create a new user with a first, middle, and last name
Map<String, Object> user = new HashMap<>();
user.put("first", "Alan");
user.put("middle", "Mathison");
user.put("last", "Turing");
user.put("born", 1912);

// Add a new document with a generated ID
db.collection("users")
        .add(user)
        .addOnSuccessListener(new OnSuccessListener<DocumentReference>() {
            @Override
            public void onSuccess(DocumentReference documentReference) {
                Log.d(TAG, "DocumentSnapshot added with ID: " + documentReference.getId());
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error adding document", e);
            }
        });
DocSnippets.java

Dart

// Create a new user with a first and last name
final user = <String, dynamic>{
  "first": "Alan",
  "middle": "Mathison",
  "last": "Turing",
  "born": 1912
};

// Add a new document with a generated ID
db.collection("users").add(user).then((DocumentReference doc) =>
    print('DocumentSnapshot added with ID: ${doc.id}'));
firestore.dart

Java

DocumentReference docRef = db.collection("users").document("aturing");
// Add document data with an additional field ("middle")
Map<String, Object> data = new HashMap<>();
data.put("first", "Alan");
data.put("middle", "Mathison");
data.put("last", "Turing");
data.put("born", 1912);

ApiFuture<WriteResult> result = docRef.set(data);
System.out.println("Update time : " + result.get().getUpdateTime());
Quickstart.java

Python

doc_ref = db.collection("users").document("aturing")
doc_ref.set({"first": "Alan", "middle": "Mathison", "last": "Turing", "born": 1912})
snippets.py

Python

doc_ref = db.collection("users").document("aturing")
await doc_ref.set(
    {"first": "Alan", "middle": "Mathison", "last": "Turing", "born": 1912}
)
snippets.py

C++

db->Collection("users")
    .Add({{"first", FieldValue::String("Alan")},
          {"middle", FieldValue::String("Mathison")},
          {"last", FieldValue::String("Turing")},
          {"born", FieldValue::Integer(1912)}})
    .OnCompletion([](const Future<DocumentReference>& future) {
      if (future.error() == Error::kErrorOk) {
        std::cout << "DocumentSnapshot added with ID: "
                  << future.result()->id() << std::endl;
      } else {
        std::cout << "Error adding document: " << future.error_message()
                  << std::endl;
      }
    });
snippets.cpp

Node.js

const aTuringRef = db.collection('users').doc('aturing');

await aTuringRef.set({
  'first': 'Alan',
  'middle': 'Mathison',
  'last': 'Turing',
  'born': 1912
});
index.js

Go

_, _, err = client.Collection("users").Add(ctx, map[string]interface{}{
	"first":  "Alan",
	"middle": "Mathison",
	"last":   "Turing",
	"born":   1912,
})
if err != nil {
	log.Fatalf("Failed adding aturing: %v", err)
}
main.go

PHP

$docRef = $db->collection('samples/php/users')->document('aturing');
$docRef->set([
    'first' => 'Alan',
    'middle' => 'Mathison',
    'last' => 'Turing',
    'born' => 1912
]);
printf('Added data to the aturing document in the users collection.' . PHP_EOL);
setup_dataset.php

Unity

DocumentReference docRef = db.Collection("users").Document("aturing");
Dictionary<string, object> user = new Dictionary<string, object>
{
	{ "First", "Alan" },
	{ "Middle", "Mathison" },
	{ "Last", "Turing" },
	{ "Born", 1912 }
};
docRef.SetAsync(user).ContinueWithOnMainThread(task => {
	Debug.Log("Added data to the aturing document in the users collection.");
});

C#

DocumentReference docRef = db.Collection("users").Document("aturing");
Dictionary<string, object> user = new Dictionary<string, object>
{
    { "First", "Alan" },
    { "Middle", "Mathison" },
    { "Last", "Turing" },
    { "Born", 1912 }
};
await docRef.SetAsync(user);
Program.cs

Ruby

doc_ref = firestore.doc "#{collection_path}/aturing"

doc_ref.set(
  {
    first:  "Alan",
    middle: "Mathison",
    last:   "Turing",
    born:   1912
  }
)

puts "Added data to the aturing document in the users collection."
quickstart.rb

Web 模块化 API

import { collection, getDocs } from "firebase/firestore"; 

const querySnapshot = await getDocs(collection(db, "users"));
querySnapshot.forEach((doc) => {
  console.log(`${doc.id} => ${doc.data()}`);
});
get_all_users.js

Web 命名空间型 API

db.collection("users").get().then((querySnapshot) => {
    querySnapshot.forEach((doc) => {
        console.log(`${doc.id} => ${doc.data()}`);
    });
});
test.firestore.js

Swift

db.collection("users").getDocuments() { (querySnapshot, err) in
  if let err = err {
    print("Error getting documents: \(err)")
  } else {
    for document in querySnapshot!.documents {
      print("\(document.documentID) => \(document.data())")
    }
  }
}
ViewController.swift

Objective-C

[[self.db collectionWithPath:@"users"]
    getDocumentsWithCompletion:^(FIRQuerySnapshot * _Nullable snapshot,
                                 NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error getting documents: %@", error);
      } else {
        for (FIRDocumentSnapshot *document in snapshot.documents) {
          NSLog(@"%@ => %@", document.documentID, document.data);
        }
      }
    }];
ViewController.m

Kotlin+KTX

db.collection("users")
    .get()
    .addOnSuccessListener { result ->
        for (document in result) {
            Log.d(TAG, "${document.id} => ${document.data}")
        }
    }
    .addOnFailureListener { exception ->
        Log.w(TAG, "Error getting documents.", exception)
    }
DocSnippets.kt

Java

db.collection("users")
        .get()
        .addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
            @Override
            public void onComplete(@NonNull Task<QuerySnapshot> task) {
                if (task.isSuccessful()) {
                    for (QueryDocumentSnapshot document : task.getResult()) {
                        Log.d(TAG, document.getId() + " => " + document.getData());
                    }
                } else {
                    Log.w(TAG, "Error getting documents.", task.getException());
                }
            }
        });
DocSnippets.java

Dart

await db.collection("users").get().then((event) {
  for (var doc in event.docs) {
    print("${doc.id} => ${doc.data()}");
  }
});
firestore.dart

Java

// asynchronously retrieve all users
ApiFuture<QuerySnapshot> query = db.collection("users").get();
// ...
// query.get() blocks on response
QuerySnapshot querySnapshot = query.get();
List<QueryDocumentSnapshot> documents = querySnapshot.getDocuments();
for (QueryDocumentSnapshot document : documents) {
  System.out.println("User: " + document.getId());
  System.out.println("First: " + document.getString("first"));
  if (document.contains("middle")) {
    System.out.println("Middle: " + document.getString("middle"));
  }
  System.out.println("Last: " + document.getString("last"));
  System.out.println("Born: " + document.getLong("born"));
}
Quickstart.java

Python

users_ref = db.collection("users")
docs = users_ref.stream()

for doc in docs:
    print(f"{doc.id} => {doc.to_dict()}")
snippets.py

Python

users_ref = db.collection("users")
docs = users_ref.stream()

async for doc in docs:
    print(f"{doc.id} => {doc.to_dict()}")
snippets.py

C++

Future<QuerySnapshot> users = db->Collection("users").Get();
users.OnCompletion([](const Future<QuerySnapshot>& future) {
  if (future.error() == Error::kErrorOk) {
    for (const DocumentSnapshot& document : future.result()->documents()) {
      std::cout << document << std::endl;
    }
  } else {
    std::cout << "Error getting documents: " << future.error_message()
              << std::endl;
  }
});
snippets.cpp

Node.js

const snapshot = await db.collection('users').get();
snapshot.forEach((doc) => {
  console.log(doc.id, '=>', doc.data());
});
index.js

Go

iter := client.Collection("users").Documents(ctx)
for {
	doc, err := iter.Next()
	if err == iterator.Done {
		break
	}
	if err != nil {
		log.Fatalf("Failed to iterate: %v", err)
	}
	fmt.Println(doc.Data())
}
main.go

PHP

$usersRef = $db->collection('samples/php/users');
$snapshot = $usersRef->documents();
foreach ($snapshot as $user) {
    printf('User: %s' . PHP_EOL, $user->id());
    printf('First: %s' . PHP_EOL, $user['first']);
    if (!empty($user['middle'])) {
        printf('Middle: %s' . PHP_EOL, $user['middle']);
    }
    printf('Last: %s' . PHP_EOL, $user['last']);
    printf('Born: %d' . PHP_EOL, $user['born']);
    printf(PHP_EOL);
}
printf('Retrieved and printed out all documents from the users collection.' . PHP_EOL);
setup_dataset_read.php

Unity

CollectionReference usersRef = db.Collection("users");
usersRef.GetSnapshotAsync().ContinueWithOnMainThread(task =>
{
  QuerySnapshot snapshot = task.Result;
  foreach (DocumentSnapshot document in snapshot.Documents)
  {
    Debug.Log(String.Format("User: {0}", document.Id));
    Dictionary<string, object> documentDictionary = document.ToDictionary();
    Debug.Log(String.Format("First: {0}", documentDictionary["First"]));
    if (documentDictionary.ContainsKey("Middle"))
    {
      Debug.Log(String.Format("Middle: {0}", documentDictionary["Middle"]));
    }

    Debug.Log(String.Format("Last: {0}", documentDictionary["Last"]));
    Debug.Log(String.Format("Born: {0}", documentDictionary["Born"]));
  }

  Debug.Log("Read all data from the users collection.");
});

C#

CollectionReference usersRef = db.Collection("users");
QuerySnapshot snapshot = await usersRef.GetSnapshotAsync();
foreach (DocumentSnapshot document in snapshot.Documents)
{
    Console.WriteLine("User: {0}", document.Id);
    Dictionary<string, object> documentDictionary = document.ToDictionary();
    Console.WriteLine("First: {0}", documentDictionary["First"]);
    if (documentDictionary.ContainsKey("Middle"))
    {
        Console.WriteLine("Middle: {0}", documentDictionary["Middle"]);
    }
    Console.WriteLine("Last: {0}", documentDictionary["Last"]);
    Console.WriteLine("Born: {0}", documentDictionary["Born"]);
    Console.WriteLine();
}
Program.cs

Ruby

users_ref = firestore.col collection_path
users_ref.get do |user|
  puts "#{user.document_id} data: #{user.data}."
end
quickstart.rb

需要身份验证

// Allow read/write access on all documents to any user signed in to the application
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if request.auth != null;
    }
  }
}

锁定模式

// Deny read/write access to all users under any conditions
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if false;
    }
  }
}

测试模式

// Allow read/write access to all users under any conditions
// Warning: **NEVER** use this rule set in production; it allows
// anyone to overwrite your entire database.
service cloud.firestore {
  match /databases/{database}/documents {
    match /{document=**} {
      allow read, write: if true;
    }
  }
}

Web

iOS+

Android