Se usó la API de Cloud Translation para traducir esta página.

Eliminar datos de Cloud Firestore

Los siguientes ejemplos muestran cómo eliminar documentos, campos y colecciones.

Eliminar documentos

Para eliminar un documento, utilice los siguientes métodos delete() específicos del idioma:

Web version 9

Utilice el método deleteDoc() :

import { doc, deleteDoc } from "firebase/firestore";

await deleteDoc(doc(db, "cities", "DC"));delete_document.js

Web version 8

Utilice el método delete() :

db.collection("cities").doc("DC").delete().then(() => {
    console.log("Document successfully deleted!");
}).catch((error) => {
    console.error("Error removing document: ", error);
});test.firestore.js

Rápido

Utilice el método delete() :

Nota: este producto no está disponible en los objetivos watchOS y App Clip.

db.collection("cities").document("DC").delete() { err in
    if let err = err {
        print("Error removing document: \(err)")
    } else {
        print("Document successfully removed!")
    }
}ViewController.swift

C objetivo

Utilice el método deleteDocumentWithCompletion: :

Nota: este producto no está disponible en los objetivos watchOS y App Clip.

[[[self.db collectionWithPath:@"cities"] documentWithPath:@"DC"]
    deleteDocumentWithCompletion:^(NSError * _Nullable error) {
      if (error != nil) {
        NSLog(@"Error removing document: %@", error);
      } else {
        NSLog(@"Document successfully removed!");
      }
}];ViewController.m

Kotlin+KTX

Utilice el método delete() :

db.collection("cities").document("DC")
        .delete()
        .addOnSuccessListener { Log.d(TAG, "DocumentSnapshot successfully deleted!") }
        .addOnFailureListener { e -> Log.w(TAG, "Error deleting document", e) }DocSnippets.kt

Java

Utilice el método delete() :

db.collection("cities").document("DC")
        .delete()
        .addOnSuccessListener(new OnSuccessListener<Void>() {
            @Override
            public void onSuccess(Void aVoid) {
                Log.d(TAG, "DocumentSnapshot successfully deleted!");
            }
        })
        .addOnFailureListener(new OnFailureListener() {
            @Override
            public void onFailure(@NonNull Exception e) {
                Log.w(TAG, "Error deleting document", e);
            }
        });DocSnippets.java

Dart

Utilice el método delete() :

db.collection("cities").doc("DC").delete().then(
      (doc) => print("Document deleted"),
      onError: (e) => print("Error updating document $e"),
    );firestore.dart

Java

Utilice el método delete() :

// asynchronously delete a document
ApiFuture<WriteResult> writeResult = db.collection("cities").document("DC").delete();
// ...
System.out.println("Update time : " + writeResult.get().getUpdateTime());ManageDataSnippets.java

Pitón

Utilice el método delete() :

db.collection(u'cities').document(u'DC').delete()snippets.py

Python

Utilice el método delete() :

await db.collection("cities").document("DC").delete()snippets.py

C++

Utilice el método Delete() :

db->Collection("cities").Document("DC").Delete().OnCompletion(
    [](const Future<void>& future) {
      if (future.error() == Error::kErrorOk) {
        std::cout << "DocumentSnapshot successfully deleted!" << std::endl;
      } else {
        std::cout << "Error deleting document: " << future.error_message()
                  << std::endl;
      }
    });snippets.cpp

Nodo.js

Utilice el método delete() :

const res = await db.collection('cities').doc('DC').delete();index.js

Vamos

Utilice el método Delete() :

_, err := client.Collection("cities").Doc("DC").Delete(ctx)
if err != nil {
	// Handle any errors in an appropriate way, such as returning them.
	log.Printf("An error has occurred: %s", err)
}save.go

PHP

Utilice el método delete() :

$db->collection('samples/php/cities')->document('DC')->delete();data_delete_doc.php

Unidad

Utilice el método DeleteAsync() :

DocumentReference cityRef = db.Collection("cities").Document("DC");
cityRef.DeleteAsync();

C#

Utilice el método DeleteAsync() :

DocumentReference cityRef = db.Collection("cities").Document("DC");
await cityRef.DeleteAsync();Program.cs

Rubí

Utilice el método delete() :

city_ref = firestore.doc "#{collection_path}/DC"
city_ref.deletedelete_data.rb

Cuando elimina un documento, Cloud Firestore no elimina automáticamente los documentos dentro de sus subcolecciones. Todavía puede acceder a los documentos de la subcolección por referencia. Por ejemplo, puede acceder al documento en la ruta /mycoll/mydoc/mysubcoll/mysubdoc incluso si elimina el documento principal en /mycoll/mydoc .

Los documentos ancestros inexistentes aparecen en la consola , pero no aparecen en los resultados de la consulta ni en las instantáneas.

Si desea eliminar un documento y todos los documentos dentro de sus subcolecciones, debe hacerlo manualmente. Para obtener más información, consulte Eliminar colecciones .

Eliminar campos

Para eliminar campos específicos de un documento, utilice los siguientes métodos FieldValue.delete() específicos del idioma cuando actualice un documento:

Web version 9

Utilice el método deleteField() :

import { doc, updateDoc, deleteField } from "firebase/firestore";

const cityRef = doc(db, 'cities', 'BJ');

// Remove the 'capital' field from the document
await updateDoc(cityRef, {
    capital: deleteField()
});update_delete_field.js

Web version 8

Utilice el método FieldValue.delete() :

var cityRef = db.collection('cities').doc('BJ');

// Remove the 'capital' field from the document
var removeCapital = cityRef.update({
    capital: firebase.firestore.FieldValue.delete()
});test.firestore.js

Rápido

Utilice el método FieldValue.delete() :

Nota: este producto no está disponible en los objetivos watchOS y App Clip.

db.collection("cities").document("BJ").updateData([
    "capital": FieldValue.delete(),
]) { err in
    if let err = err {
        print("Error updating document: \(err)")
    } else {
        print("Document successfully updated")
    }
}ViewController.swift

C objetivo

Utilice el método fieldValueForDelete: ::

Nota: este producto no está disponible en los objetivos watchOS y App Clip.

[[[self.db collectionWithPath:@"cities"] documentWithPath:@"BJ"] updateData:@{
  @"capital": [FIRFieldValue fieldValueForDelete]
} completion:^(NSError * _Nullable error) {
  if (error != nil) {
    NSLog(@"Error updating document: %@", error);
  } else {
    NSLog(@"Document successfully updated");
  }
}];ViewController.m

Kotlin+KTX

Utilice el método FieldValue.delete() :

val docRef = db.collection("cities").document("BJ")

// Remove the 'capital' field from the document
val updates = hashMapOf<String, Any>(
        "capital" to FieldValue.delete()
)

docRef.update(updates).addOnCompleteListener { }DocSnippets.kt

Java

Utilice el método FieldValue.delete() :

DocumentReference docRef = db.collection("cities").document("BJ");

// Remove the 'capital' field from the document
Map<String,Object> updates = new HashMap<>();
updates.put("capital", FieldValue.delete());

docRef.update(updates).addOnCompleteListener(new OnCompleteListener<Void>() {
    // ...
    // ...DocSnippets.java

Dart

Utilice el método FieldValue.delete() :

final docRef = db.collection("cities").doc("BJ");

// Remove the 'capital' field from the document
final updates = <String, dynamic>{
  "capital": FieldValue.delete(),
};

docRef.update(updates);firestore.dart

Java

Utilice el método FieldValue.delete() :

DocumentReference docRef = db.collection("cities").document("BJ");
Map<String, Object> updates = new HashMap<>();
updates.put("capital", FieldValue.delete());
// Update and delete the "capital" field in the document
ApiFuture<WriteResult> writeResult = docRef.update(updates);
System.out.println("Update time : " + writeResult.get());ManageDataSnippets.java

Pitón

Usa el método firestore.DELETE_FIELD :

city_ref = db.collection(u'cities').document(u'BJ')
city_ref.update({
    u'capital': firestore.DELETE_FIELD
})snippets.py

Python

Usa el método firestore.DELETE_FIELD :

city_ref = db.collection("cities").document("BJ")
await city_ref.update({"capital": firestore.DELETE_FIELD})snippets.py

C++

Utilice el FieldValue::Delete() :

DocumentReference doc_ref = db->Collection("cities").Document("BJ");
doc_ref.Update({{"capital", FieldValue::Delete()}})
    .OnCompletion([](const Future<void>& future) { /*...*/ });snippets.cpp

Nodo.js

Utilice el método FieldValue.delete() :

// Create a document reference
const cityRef = db.collection('cities').doc('BJ');

// Remove the 'capital' field from the document
const res = await cityRef.update({
  capital: FieldValue.delete()
});index.js

Vamos

Usa el método firestore.Delete :

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

PHP

Utilice el FieldValue::deleteField() :

$cityRef = $db->collection('samples/php/cities')->document('BJ');
$cityRef->update([
    ['path' => 'capital', 'value' => FieldValue::deleteField()]
]);data_delete_field.php

Unidad

Utilice el método FieldValue.Delete :

DocumentReference cityRef = db.Collection("cities").Document("BJ");
Dictionary<string, object> updates = new Dictionary<string, object>
{
    { "Capital", FieldValue.Delete }
};

C#

Utilice el método FieldValue.Delete :

DocumentReference cityRef = db.Collection("cities").Document("BJ");
Dictionary<string, object> updates = new Dictionary<string, object>
{
    { "Capital", FieldValue.Delete }
};
await cityRef.UpdateAsync(updates);Program.cs

Rubí

Usa el método firestore.field_delete :

city_ref = firestore.doc "#{collection_path}/BJ"
city_ref.update({ capital: firestore.field_delete })delete_data.rb

Eliminar colecciones

Para eliminar una colección o subcolección completa en Cloud Firestore, recupere todos los documentos dentro de la colección o subcolección y elimínelos. Si tiene colecciones más grandes, es posible que desee eliminar los documentos en lotes más pequeños para evitar errores de falta de memoria. Repita el proceso hasta que haya eliminado toda la colección o subcolección.

La eliminación de una colección requiere la coordinación de un número ilimitado de solicitudes de eliminación individuales. Si necesita eliminar colecciones completas, hágalo solo desde un entorno de servidor confiable. Si bien es posible eliminar una colección de un cliente móvil/web, hacerlo tiene implicaciones negativas de seguridad y rendimiento.

Los fragmentos a continuación están algo simplificados y no se ocupan del manejo de errores, la seguridad, la eliminación de subcolecciones o la maximización del rendimiento. Para obtener más información sobre un enfoque recomendado para eliminar colecciones en producción, consulte Eliminación de colecciones y subcolecciones .

Web

// Deleting collections from a Web client is not recommended.

Rápido

Nota: este producto no está disponible en los objetivos watchOS y App Clip.

// Deleting collections from an Apple client is not recommended.

C objetivo

Nota: este producto no está disponible en los objetivos watchOS y App Clip.

// Deleting collections from an Apple client is not recommended.

Kotlin+KTX

// Deleting collections from an Android client is not recommended.

Java

// Deleting collections from an Android client is not recommended.

Dart

No se recomienda eliminar colecciones del cliente.

Java

/**
 * Delete a collection in batches to avoid out-of-memory errors. Batch size may be tuned based on
 * document size (atmost 1MB) and application requirements.
 */
void deleteCollection(CollectionReference collection, int batchSize) {
  try {
    // retrieve a small batch of documents to avoid out-of-memory errors
    ApiFuture<QuerySnapshot> future = collection.limit(batchSize).get();
    int deleted = 0;
    // future.get() blocks on document retrieval
    List<QueryDocumentSnapshot> documents = future.get().getDocuments();
    for (QueryDocumentSnapshot document : documents) {
      document.getReference().delete();
      ++deleted;
    }
    if (deleted >= batchSize) {
      // retrieve and delete another batch
      deleteCollection(collection, batchSize);
    }
  } catch (Exception e) {
    System.err.println("Error deleting collection : " + e.getMessage());
  }
}ManageDataSnippets.java

Pitón

def delete_collection(coll_ref, batch_size):
    docs = coll_ref.list_documents(page_size=batch_size)
    deleted = 0

    for doc in docs:
        print(f'Deleting doc {doc.id} => {doc.get().to_dict()}')
        doc.delete()
        deleted = deleted + 1

    if deleted >= batch_size:
        return delete_collection(coll_ref, batch_size)snippets.py

Python

async def delete_collection(coll_ref, batch_size):
    docs = coll_ref.limit(batch_size).stream()
    deleted = 0

    async for doc in docs:
        print(f"Deleting doc {doc.id} => {doc.to_dict()}")
        await doc.reference.delete()
        deleted = deleted + 1

    if deleted >= batch_size:
        return delete_collection(coll_ref, batch_size)
snippets.py

C++

// This is not supported. Delete data using CLI as discussed below.

Nodo.js

async function deleteCollection(db, collectionPath, batchSize) {
  const collectionRef = db.collection(collectionPath);
  const query = collectionRef.orderBy('__name__').limit(batchSize);

  return new Promise((resolve, reject) => {
    deleteQueryBatch(db, query, resolve).catch(reject);
  });
}

async function deleteQueryBatch(db, query, resolve) {
  const snapshot = await query.get();

  const batchSize = snapshot.size;
  if (batchSize === 0) {
    // When there are no documents left, we are done
    resolve();
    return;
  }

  // Delete documents in a batch
  const batch = db.batch();
  snapshot.docs.forEach((doc) => {
    batch.delete(doc.ref);
  });
  await batch.commit();

  // Recurse on the next process tick, to avoid
  // exploding the stack.
  process.nextTick(() => {
    deleteQueryBatch(db, query, resolve);
  });
}
index.js

Vamos

func deleteCollection(ctx context.Context, client *firestore.Client,
	ref *firestore.CollectionRef, batchSize int) error {

	for {
		// Get a batch of documents
		iter := ref.Limit(batchSize).Documents(ctx)
		numDeleted := 0

		// Iterate through the documents, adding
		// a delete operation for each one to a
		// WriteBatch.
		batch := client.Batch()
		for {
			doc, err := iter.Next()
			if err == iterator.Done {
				break
			}
			if err != nil {
				return err
			}

			batch.Delete(doc.Ref)
			numDeleted++
		}

		// If there are no documents to delete,
		// the process is over.
		if numDeleted == 0 {
			return nil
		}

		_, err := batch.Commit(ctx)
		if err != nil {
			return err
		}
	}
}
save.go

PHP

function data_delete_collection(string $projectId, string $collectionName, int $batchSize)
{
    // Create the Cloud Firestore client
    $db = new FirestoreClient([
        'projectId' => $projectId,
    ]);
    $collectionReference = $db->collection($collectionName);
    $documents = $collectionReference->limit($batchSize)->documents();
    while (!$documents->isEmpty()) {
        foreach ($documents as $document) {
            printf('Deleting document %s' . PHP_EOL, $document->id());
            $document->reference()->delete();
        }
        $documents = $collectionReference->limit($batchSize)->documents();
    }
}data_delete_collection.php

Unidad

// This is not supported. Delete data using CLI as discussed below.

C#

private static async Task DeleteCollection(CollectionReference collectionReference, int batchSize)
{
    QuerySnapshot snapshot = await collectionReference.Limit(batchSize).GetSnapshotAsync();
    IReadOnlyList<DocumentSnapshot> documents = snapshot.Documents;
    while (documents.Count > 0)
    {
        foreach (DocumentSnapshot document in documents)
        {
            Console.WriteLine("Deleting document {0}", document.Id);
            await document.Reference.DeleteAsync();
        }
        snapshot = await collectionReference.Limit(batchSize).GetSnapshotAsync();
        documents = snapshot.Documents;
    }
    Console.WriteLine("Finished deleting all documents from the collection.");
}Program.cs

Rubí

cities_ref = firestore.col collection_path
query      = cities_ref

query.get do |document_snapshot|
  puts "Deleting document #{document_snapshot.document_id}."
  document_ref = document_snapshot.ref
  document_ref.delete
enddelete_data.rb

Eliminar datos con Firebase CLI

También puede usar Firebase CLI para eliminar documentos y colecciones. Utilice el siguiente comando para eliminar datos:

firebase firestore:delete [options] <<path>>

Eliminar datos con la consola

Puede eliminar documentos y colecciones desde la página de Cloud Firestore en la consola . Al eliminar un documento de la consola, se eliminan todos los datos anidados en ese documento, incluidas las subcolecciones.