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collection.deleteMany()

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Definition

collection.deleteMany()

Remove one or more documents from the collection based on a query filter.

Usage

Example

To call the collection.deleteMany() action from a Function, get a collection handle with database.collection() then call the handle’s deleteMany() method.

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const query = { "reviews": { "$size": 0 } };

itemsCollection.deleteMany(query)
  .then(result => console.log(`Deleted ${result.deletedCount} item(s).`))
  .catch(err => console.error(`Delete failed with error: ${err}`))

To call the collection.deleteMany() action from a JavaScript SDK, use the RemoteMongoCollection.deleteMany() method.

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const query = { "reviews": { "$size": 0 } };

itemsCollection.deleteMany(query)
  .then(result => console.log(`Deleted ${result.deletedCount} item(s).`))
  .catch(err => console.error(`Delete failed with error: ${err}`))

To call the collection.deleteMany() action from the Java/Android SDK, use the RemoteMongoCollection.deleteMany() method.

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Document filterDoc = new Document().append("reviews", new Document().append("$size", 0));

final Task <RemoteDeleteResult> deleteTask = itemsCollection.deleteMany(filterDoc);
deleteTask.addOnCompleteListener(new OnCompleteListener <RemoteDeleteResult> () {
    @Override
    public void onComplete(@NonNull Task <RemoteDeleteResult> task) {
        if (task.isSuccessful()) {
            long numDeleted = task.getResult().getDeletedCount();
            Log.d("app", String.format("successfully deleted %d documents", numDeleted));
        } else {
            Log.e("app", "failed to delete document with: ", task.getException());
        }
    }
});

To call the collection.deleteMany() action from the Swift/iOS SDK, use the RemoteMongoCollection.deleteMany() method.

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let query : Document = ["reviews": ["$size": 0] as Document];

itemsCollection?.deleteMany(query) { result in
    switch result {
    case .success(let result):
        print("Deleted \(result.deletedCount) item(s).");
    case .failure(let error):
        print("Delete failed with error: \(error)");
    }
}

Parameters

The collection.deleteMany() action has the following form:

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deleteMany(query)
Parameter Description

Query Filter

query: <document>
 Optional. A standard MongoDB query document that specifies which documents to delete. You can use most query selectors except for evaluation, geospatial, or bitwise selectors.

The deleteMany() method has the following form:

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deleteMany(query)
Parameter Description

Query Filter

query: <document>
 Optional. A standard MongoDB query document that specifies which documents to delete. You can use most query selectors except for evaluation, geospatial, or bitwise selectors.

The deleteMany() method has the following form:

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deleteMany​(Bson query)
Parameter Description

Query Filter

query: <document>
 Optional. A standard MongoDB query document that specifies which documents to delete. You can use most query selectors except for evaluation, geospatial, or bitwise selectors.

The deleteMany() method has the following form:

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deleteMany(query)
Parameter Description

Query Filter

query: <document>
 Optional. A standard MongoDB query document that specifies which documents to delete. You can use most query selectors except for evaluation, geospatial, or bitwise selectors.

Return Value

The collection.deleteMany() action returns a Promise that resolves to a document that describes the delete operation.

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Promise<result: document>

The RemoteMongoCollection.deleteMany() method returns a Promise that resolves to a RemoteDeleteResult object that describes the delete operation.

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Promise<result: RemoteDeleteResult>

The RemoteMongoCollection.deleteMany() method returns a Task that resolves to a RemoteDeleteResult object that describes the delete operation.

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Task<RemoteDeleteResult result>

The RemoteMongoCollection.deleteMany() method returns a StitchResult enum that resolves to a RemoteDeleteResult object that describes the delete operation.

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enum StitchResult {
  case success(result: RemoteDeleteResult)
  case failure(error: StitchError)
}
Value Description

Matched Count

result.deletedCount: <integer>
result.deletedCount: <integer>
result.deletedCount: <Long>
result.deletedCount: <Int>
 The number of documents in the collection that were deleted by the delete operation.

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