Class WriteBatch (7.1.0)

A Firestore WriteBatch that can be used to atomically commit multiple write operations at once.

WriteBatch

Package

Constructors

(constructor)(firestore)

constructor(firestore: Firestore);

Constructs a new instance of the WriteBatch class

Parameter
Name	Description
`firestore`	`Firestore`

Properties

_opCount

get _opCount(): number;

The number of writes in this batch.

Methods

commit()

commit(): Promise<WriteResult[]>;

Atomically commits all pending operations to the database and verifies all preconditions. Fails the entire write if any precondition is not met.

Returns

Type Description

Promise<WriteResult[]>

{Promise.<Array.

Example


let writeBatch = firestore.batch();
let documentRef = firestore.doc('col/doc');

writeBatch.set(documentRef, {foo: 'bar'});

writeBatch.commit().then(() => {
  console.log('Successfully executed batch.');
});

create(documentRef, data)

create<AppModelType, DbModelType extends firestore.DocumentData>(documentRef: firestore.DocumentReference<AppModelType, DbModelType>, data: firestore.WithFieldValue<AppModelType>): WriteBatch;

Create a document with the provided object values. This will fail the batch if a document exists at its location.

Parameters
Name	Description
`documentRef`	`FirebaseFirestore.DocumentReference<AppModelType, DbModelType>` A reference to the document to be created.
`data`	`FirebaseFirestore.WithFieldValue<AppModelType>` The object to serialize as the document.

Returns
Type	Description
`WriteBatch`	{WriteBatch} This WriteBatch instance. Used for chaining method calls.

Type Parameters
Name	Description
`AppModelType`
`DbModelType`

Example


let writeBatch = firestore.batch();
let documentRef = firestore.collection('col').doc();

writeBatch.create(documentRef, {foo: 'bar'});

writeBatch.commit().then(() => {
  console.log('Successfully executed batch.');
});

delete(documentRef, precondition)

delete(documentRef: firestore.DocumentReference<any, any>, precondition?: firestore.Precondition): WriteBatch;

Deletes a document from the database.

Parameters
Name	Description
`documentRef`	`FirebaseFirestore.DocumentReference<any, any>` A reference to the document to be deleted.
`precondition`	`firestore.Precondition` A precondition to enforce for this delete.

Returns
Type	Description
`WriteBatch`	{WriteBatch} This WriteBatch instance. Used for chaining method calls.

Example


let writeBatch = firestore.batch();
let documentRef = firestore.doc('col/doc');

writeBatch.delete(documentRef);

writeBatch.commit().then(() => {
  console.log('Successfully executed batch.');
});

set(documentRef, data, options)

set<AppModelType, DbModelType extends firestore.DocumentData>(documentRef: firestore.DocumentReference<AppModelType, DbModelType>, data: firestore.PartialWithFieldValue<AppModelType>, options: firestore.SetOptions): WriteBatch;

Parameters
Name	Description
`documentRef`	`FirebaseFirestore.DocumentReference<AppModelType, DbModelType>`
`data`	`FirebaseFirestore.PartialWithFieldValue<AppModelType>`
`options`	`firestore.SetOptions`

Returns
Type	Description
`WriteBatch`

Type Parameters
Name	Description
`AppModelType`
`DbModelType`

set(documentRef, data)

set<AppModelType, DbModelType extends firestore.DocumentData>(documentRef: firestore.DocumentReference<AppModelType, DbModelType>, data: firestore.WithFieldValue<AppModelType>): WriteBatch;

Parameters
Name	Description
`documentRef`	`FirebaseFirestore.DocumentReference<AppModelType, DbModelType>`
`data`	`FirebaseFirestore.WithFieldValue<AppModelType>`

Returns
Type	Description
`WriteBatch`

Type Parameters
Name	Description
`AppModelType`
`DbModelType`

update(documentRef, dataOrField, preconditionOrValues)

update<AppModelType = firestore.DocumentData, DbModelType extends firestore.DocumentData = firestore.DocumentData>(documentRef: firestore.DocumentReference<AppModelType, DbModelType>, dataOrField: firestore.UpdateData<DbModelType> | string | firestore.FieldPath, ...preconditionOrValues: Array<{
        lastUpdateTime?: firestore.Timestamp;
    } | unknown | string | firestore.FieldPath>): WriteBatch;

Update fields of the document referred to by the provided [DocumentReference]DocumentReference. If the document doesn't yet exist, the update fails and the entire batch will be rejected.

The update() method accepts either an object with field paths encoded as keys and field values encoded as values, or a variable number of arguments that alternate between field paths and field values. Nested fields can be updated by providing dot-separated field path strings or by providing FieldPath objects.

A Precondition restricting this update can be specified as the last argument.

Parameters
Name	Description
`documentRef`	`FirebaseFirestore.DocumentReference<AppModelType, DbModelType>` A reference to the document to be updated.
`dataOrField`	`FirebaseFirestore.UpdateData<DbModelType> \| string \| FirebaseFirestore.FieldPath` An object containing the fields and values with which to update the document or the path of the first field to update.
`preconditionOrValues`	`Array<{ lastUpdateTime?: FirebaseFirestore.Timestamp; } \| unknown \| string \| FirebaseFirestore.FieldPath>` An alternating list of field paths and values to update or a Precondition to restrict this update.

Returns
Type	Description
`WriteBatch`	{WriteBatch} This WriteBatch instance. Used for chaining method calls.

Type Parameters
Name	Description
`AppModelType`
`DbModelType`

Example


let writeBatch = firestore.batch();
let documentRef = firestore.doc('col/doc');

writeBatch.update(documentRef, {foo: 'bar'});

writeBatch.commit().then(() => {
  console.log('Successfully executed batch.');
});