FirestoreClient

FirestoreClient

The Cloud Firestore service.

Cloud Firestore is a fast, fully managed, serverless, cloud-native NoSQL document database that simplifies storing, syncing, and querying data for your mobile, web, and IoT apps at global scale. Its client libraries provide live synchronization and offline support, while its security features and integrations with Firebase and Google Cloud Platform (GCP) accelerate building truly serverless apps.

Constructor

new FirestoreClient(optionsopt)

Construct an instance of FirestoreClient.

Parameters:
Name Type Attributes Description
options object <optional>

The configuration object. See the subsequent parameters for more details.

Properties
Name Type Attributes Description
credentials object <optional>

Credentials object.

Properties
Name Type Attributes Description
client_email string <optional>
private_key string <optional>
email string <optional>

Account email address. Required when using a .pem or .p12 keyFilename.
keyFilename string <optional>

Full path to the a .json, .pem, or .p12 key downloaded from the Google Developers Console. If you provide a path to a JSON file, the projectId option below is not necessary. NOTE: .pem and .p12 require you to specify options.email as well.
port number <optional>

The port on which to connect to the remote host.
projectId string <optional>

The project ID from the Google Developer's Console, e.g. 'grape-spaceship-123'. We will also check the environment variable GCLOUD_PROJECT for your project ID. If your app is running in an environment which supports Application Default Credentials, your project ID will be detected automatically.
apiEndpoint string <optional>

The domain name of the API remote host.

Members

apiEndpoint

The DNS address for this API service - same as servicePath(), exists for compatibility reasons.

port

The port for this API service.

scopes

The scopes needed to make gRPC calls for every method defined in this service.

servicePath

The DNS address for this API service.

Methods

batchGetDocuments(request, optionsopt) → {Stream}

Gets multiple documents.

Documents returned by this method are not guaranteed to be returned in the same order that they were requested.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
database string

Required. The database name. In the format: projects/{project_id}/databases/{database_id}.
documents Array.<string>

The names of the documents to retrieve. In the format: projects/{project_id}/databases/{database_id}/documents/{document_path}. The request will fail if any of the document is not a child resource of the given database. Duplicate names will be elided.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If a document has a field that is not present in this mask, that field will not be returned in the response.
transaction Buffer

Reads documents in a transaction.
newTransaction google.firestore.v1.TransactionOptions

Starts a new transaction and reads the documents. Defaults to a read-only transaction. The new transaction ID will be returned as the first response in the stream.
readTime google.protobuf.Timestamp

Reads documents as they were at the given time. This may not be older than 270 seconds.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which emits BatchGetDocumentsResponse on 'data' event.

batchWrite(request, optionsopt) → {Promise}

Applies a batch of write operations.

The BatchWrite method does not apply the write operations atomically and can apply them out of order. Method does not allow more than one write per document. Each write succeeds or fails independently. See the BatchWriteResponse for the success status of each write.

If you require an atomically applied set of writes, use Commit instead.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
database string

Required. The database name. In the format: projects/{project_id}/databases/{database_id}.
writes Array.<number>

The writes to apply.

Method does not apply writes atomically and does not guarantee ordering. Each write succeeds or fails independently. You cannot write to the same document more than once per request.
labels Array.<number>

Labels associated with this batch write.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing BatchWriteResponse. The promise has a method named "cancel" which cancels the ongoing API call.

beginTransaction(request, optionsopt) → {Promise}

Starts a new transaction.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
database string

Required. The database name. In the format: projects/{project_id}/databases/{database_id}.
options google.firestore.v1.TransactionOptions

The options for the transaction. Defaults to a read-write transaction.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing BeginTransactionResponse. The promise has a method named "cancel" which cancels the ongoing API call.

close()

Terminate the GRPC channel and close the client.

The client will no longer be usable and all future behavior is undefined.

commit(request, optionsopt) → {Promise}

Commits a transaction, while optionally updating documents.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
database string

Required. The database name. In the format: projects/{project_id}/databases/{database_id}.
writes Array.<number>

The writes to apply.

Always executed atomically and in order.
transaction Buffer

If set, applies all writes in this transaction, and commits it.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing CommitResponse. The promise has a method named "cancel" which cancels the ongoing API call.

createDocument(request, optionsopt) → {Promise}

Creates a new document.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource. For example: projects/{project_id}/databases/{database_id}/documents or projects/{project_id}/databases/{database_id}/documents/chatrooms/{chatroom_id}
collectionId string

Required. The collection ID, relative to parent, to list. For example: chatrooms.
documentId string

The client-assigned document ID to use for this document.

Optional. If not specified, an ID will be assigned by the service.
document google.firestore.v1.Document

Required. The document to create. name must not be set.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If the document has a field that is not present in this mask, that field will not be returned in the response.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing Document. The promise has a method named "cancel" which cancels the ongoing API call.

deleteDocument(request, optionsopt) → {Promise}

Deletes a document.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

Required. The resource name of the Document to delete. In the format: projects/{project_id}/databases/{database_id}/documents/{document_path}.
currentDocument google.firestore.v1.Precondition

An optional precondition on the document. The request will fail if this is set and not met by the target document.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing Empty. The promise has a method named "cancel" which cancels the ongoing API call.

getDocument(request, optionsopt) → {Promise}

Gets a single document.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
name string

Required. The resource name of the Document to get. In the format: projects/{project_id}/databases/{database_id}/documents/{document_path}.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If the document has a field that is not present in this mask, that field will not be returned in the response.
transaction Buffer

Reads the document in a transaction.
readTime google.protobuf.Timestamp

Reads the version of the document at the given time. This may not be older than 270 seconds.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing Document. The promise has a method named "cancel" which cancels the ongoing API call.

getProjectId(callback)

Return the project ID used by this class.

Parameters:
Name Type Description
callback function

the callback to be called with the current project Id.

initialize() → {Promise}

Initialize the client. Performs asynchronous operations (such as authentication) and prepares the client. This function will be called automatically when any class method is called for the first time, but if you need to initialize it before calling an actual method, feel free to call initialize() directly.

You can await on this method if you want to make sure the client is initialized.

Returns:
Type Description
Promise

A promise that resolves to an authenticated service stub.

listCollectionIds(request, optionsopt) → {Promise}

Lists all the collection IDs underneath a document.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent document. In the format: projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
pageSize number

The maximum number of results to return.
pageToken string

A page token. Must be a value from ListCollectionIdsResponse.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise

  • The promise which resolves to an array. The first element of the array is Array of string. The client library support auto-pagination by default: it will call the API as many times as needed and will merge results from all the pages into this array.

    When autoPaginate: false is specified through options, the array has three elements. The first element is Array of string that corresponds to the one page received from the API server. If the second element is not null it contains the request object of type ListCollectionIdsRequest that can be used to obtain the next page of the results. If it is null, the next page does not exist. The third element contains the raw response received from the API server. Its type is ListCollectionIdsResponse.

    The promise has a method named "cancel" which cancels the ongoing API call.

listCollectionIdsAsync(request, optionsopt) → {Object}

Equivalent to listCollectionIds, but returns an iterable object.

for-await-of syntax is used with the iterable to recursively get response element on-demand.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent document. In the format: projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
pageSize number

The maximum number of results to return.
pageToken string

A page token. Must be a value from ListCollectionIdsResponse.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Object

An iterable Object that conforms to @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols.

listCollectionIdsStream(request, optionsopt) → {Stream}

Equivalent to listCollectionIds, but returns a NodeJS Stream object.

This fetches the paged responses for listCollectionIds continuously and invokes the callback registered for 'data' event for each element in the responses.

The returned object has 'end' method when no more elements are required.

autoPaginate option will be ignored.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent document. In the format: projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
pageSize number

The maximum number of results to return.
pageToken string

A page token. Must be a value from ListCollectionIdsResponse.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which emits an object representing string on 'data' event.
See:

listDocuments(request, optionsopt) → {Promise}

Lists documents.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents or projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents or projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
collectionId string

Required. The collection ID, relative to parent, to list. For example: chatrooms or messages.
pageSize number

The maximum number of documents to return.
pageToken string

The next_page_token value returned from a previous List request, if any.
orderBy string

The order to sort results by. For example: priority desc, name.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If a document has a field that is not present in this mask, that field will not be returned in the response.
transaction Buffer

Reads documents in a transaction.
readTime google.protobuf.Timestamp

Reads documents as they were at the given time. This may not be older than 270 seconds.
showMissing boolean

If the list should show missing documents. A missing document is a document that does not exist but has sub-documents. These documents will be returned with a key but will not have fields, Document.create_time, or Document.update_time set.

Requests with show_missing may not specify where or order_by.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise

  • The promise which resolves to an array. The first element of the array is Array of Document. The client library support auto-pagination by default: it will call the API as many times as needed and will merge results from all the pages into this array.

    When autoPaginate: false is specified through options, the array has three elements. The first element is Array of Document that corresponds to the one page received from the API server. If the second element is not null it contains the request object of type ListDocumentsRequest that can be used to obtain the next page of the results. If it is null, the next page does not exist. The third element contains the raw response received from the API server. Its type is ListDocumentsResponse.

    The promise has a method named "cancel" which cancels the ongoing API call.

listDocumentsAsync(request, optionsopt) → {Object}

Equivalent to listDocuments, but returns an iterable object.

for-await-of syntax is used with the iterable to recursively get response element on-demand.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents or projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents or projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
collectionId string

Required. The collection ID, relative to parent, to list. For example: chatrooms or messages.
pageSize number

The maximum number of documents to return.
pageToken string

The next_page_token value returned from a previous List request, if any.
orderBy string

The order to sort results by. For example: priority desc, name.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If a document has a field that is not present in this mask, that field will not be returned in the response.
transaction Buffer

Reads documents in a transaction.
readTime google.protobuf.Timestamp

Reads documents as they were at the given time. This may not be older than 270 seconds.
showMissing boolean

If the list should show missing documents. A missing document is a document that does not exist but has sub-documents. These documents will be returned with a key but will not have fields, Document.create_time, or Document.update_time set.

Requests with show_missing may not specify where or order_by.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Object

An iterable Object that conforms to @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols.

listDocumentsStream(request, optionsopt) → {Stream}

Equivalent to listDocuments, but returns a NodeJS Stream object.

This fetches the paged responses for listDocuments continuously and invokes the callback registered for 'data' event for each element in the responses.

The returned object has 'end' method when no more elements are required.

autoPaginate option will be ignored.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents or projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents or projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
collectionId string

Required. The collection ID, relative to parent, to list. For example: chatrooms or messages.
pageSize number

The maximum number of documents to return.
pageToken string

The next_page_token value returned from a previous List request, if any.
orderBy string

The order to sort results by. For example: priority desc, name.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If a document has a field that is not present in this mask, that field will not be returned in the response.
transaction Buffer

Reads documents in a transaction.
readTime google.protobuf.Timestamp

Reads documents as they were at the given time. This may not be older than 270 seconds.
showMissing boolean

If the list should show missing documents. A missing document is a document that does not exist but has sub-documents. These documents will be returned with a key but will not have fields, Document.create_time, or Document.update_time set.

Requests with show_missing may not specify where or order_by.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which emits an object representing Document on 'data' event.
See:

listen(optionsopt) → {Stream}

Listens to changes.

Parameters:
Name Type Attributes Description
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which is both readable and writable. It accepts objects representing ListenRequest for write() method, and will emit objects representing ListenResponse on 'data' event asynchronously.

partitionQuery(request, optionsopt) → {Promise}

Partitions a query by returning partition cursors that can be used to run the query in parallel. The returned partition cursors are split points that can be used by RunQuery as starting/end points for the query results.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents. Document resource names are not supported; only database resource names can be specified.
structuredQuery google.firestore.v1.StructuredQuery

A structured query. Query must specify collection with all descendants and be ordered by name ascending. Other filters, order bys, limits, offsets, and start/end cursors are not supported.
partitionCount number

The desired maximum number of partition points. The partitions may be returned across multiple pages of results. The number must be positive. The actual number of partitions returned may be fewer.

For example, this may be set to one fewer than the number of parallel queries to be run, or in running a data pipeline job, one fewer than the number of workers or compute instances available.
pageToken string

The next_page_token value returned from a previous call to PartitionQuery that may be used to get an additional set of results. There are no ordering guarantees between sets of results. Thus, using multiple sets of results will require merging the different result sets.

For example, two subsequent calls using a page_token may return:

  • cursor B, cursor M, cursor Q
  • cursor A, cursor U, cursor W

To obtain a complete result set ordered with respect to the results of the query supplied to PartitionQuery, the results sets should be merged: cursor A, cursor B, cursor M, cursor Q, cursor U, cursor W
pageSize number

The maximum number of partitions to return in this call, subject to partition_count.

For example, if partition_count = 10 and page_size = 8, the first call to PartitionQuery will return up to 8 partitions and a next_page_token if more results exist. A second call to PartitionQuery will return up to 2 partitions, to complete the total of 10 specified in partition_count.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise

  • The promise which resolves to an array. The first element of the array is Array of Cursor. The client library support auto-pagination by default: it will call the API as many times as needed and will merge results from all the pages into this array.

    When autoPaginate: false is specified through options, the array has three elements. The first element is Array of Cursor that corresponds to the one page received from the API server. If the second element is not null it contains the request object of type PartitionQueryRequest that can be used to obtain the next page of the results. If it is null, the next page does not exist. The third element contains the raw response received from the API server. Its type is PartitionQueryResponse.

    The promise has a method named "cancel" which cancels the ongoing API call.

partitionQueryAsync(request, optionsopt) → {Object}

Equivalent to partitionQuery, but returns an iterable object.

for-await-of syntax is used with the iterable to recursively get response element on-demand.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents. Document resource names are not supported; only database resource names can be specified.
structuredQuery google.firestore.v1.StructuredQuery

A structured query. Query must specify collection with all descendants and be ordered by name ascending. Other filters, order bys, limits, offsets, and start/end cursors are not supported.
partitionCount number

The desired maximum number of partition points. The partitions may be returned across multiple pages of results. The number must be positive. The actual number of partitions returned may be fewer.

For example, this may be set to one fewer than the number of parallel queries to be run, or in running a data pipeline job, one fewer than the number of workers or compute instances available.
pageToken string

The next_page_token value returned from a previous call to PartitionQuery that may be used to get an additional set of results. There are no ordering guarantees between sets of results. Thus, using multiple sets of results will require merging the different result sets.

For example, two subsequent calls using a page_token may return:

  • cursor B, cursor M, cursor Q
  • cursor A, cursor U, cursor W

To obtain a complete result set ordered with respect to the results of the query supplied to PartitionQuery, the results sets should be merged: cursor A, cursor B, cursor M, cursor Q, cursor U, cursor W
pageSize number

The maximum number of partitions to return in this call, subject to partition_count.

For example, if partition_count = 10 and page_size = 8, the first call to PartitionQuery will return up to 8 partitions and a next_page_token if more results exist. A second call to PartitionQuery will return up to 2 partitions, to complete the total of 10 specified in partition_count.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Object

An iterable Object that conforms to @link https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Iteration_protocols.

partitionQueryStream(request, optionsopt) → {Stream}

Equivalent to partitionQuery, but returns a NodeJS Stream object.

This fetches the paged responses for partitionQuery continuously and invokes the callback registered for 'data' event for each element in the responses.

The returned object has 'end' method when no more elements are required.

autoPaginate option will be ignored.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents. Document resource names are not supported; only database resource names can be specified.
structuredQuery google.firestore.v1.StructuredQuery

A structured query. Query must specify collection with all descendants and be ordered by name ascending. Other filters, order bys, limits, offsets, and start/end cursors are not supported.
partitionCount number

The desired maximum number of partition points. The partitions may be returned across multiple pages of results. The number must be positive. The actual number of partitions returned may be fewer.

For example, this may be set to one fewer than the number of parallel queries to be run, or in running a data pipeline job, one fewer than the number of workers or compute instances available.
pageToken string

The next_page_token value returned from a previous call to PartitionQuery that may be used to get an additional set of results. There are no ordering guarantees between sets of results. Thus, using multiple sets of results will require merging the different result sets.

For example, two subsequent calls using a page_token may return:

  • cursor B, cursor M, cursor Q
  • cursor A, cursor U, cursor W

To obtain a complete result set ordered with respect to the results of the query supplied to PartitionQuery, the results sets should be merged: cursor A, cursor B, cursor M, cursor Q, cursor U, cursor W
pageSize number

The maximum number of partitions to return in this call, subject to partition_count.

For example, if partition_count = 10 and page_size = 8, the first call to PartitionQuery will return up to 8 partitions and a next_page_token if more results exist. A second call to PartitionQuery will return up to 2 partitions, to complete the total of 10 specified in partition_count.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which emits an object representing Cursor on 'data' event.
See:

rollback(request, optionsopt) → {Promise}

Rolls back a transaction.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
database string

Required. The database name. In the format: projects/{project_id}/databases/{database_id}.
transaction Buffer

Required. The transaction to roll back.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing Empty. The promise has a method named "cancel" which cancels the ongoing API call.

runQuery(request, optionsopt) → {Stream}

Runs a query.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
parent string

Required. The parent resource name. In the format: projects/{project_id}/databases/{database_id}/documents or projects/{project_id}/databases/{database_id}/documents/{document_path}. For example: projects/my-project/databases/my-database/documents or projects/my-project/databases/my-database/documents/chatrooms/my-chatroom
structuredQuery google.firestore.v1.StructuredQuery

A structured query.
transaction Buffer

Reads documents in a transaction.
newTransaction google.firestore.v1.TransactionOptions

Starts a new transaction and reads the documents. Defaults to a read-only transaction. The new transaction ID will be returned as the first response in the stream.
readTime google.protobuf.Timestamp

Reads documents as they were at the given time. This may not be older than 270 seconds.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which emits RunQueryResponse on 'data' event.

updateDocument(request, optionsopt) → {Promise}

Updates or inserts a document.

Parameters:
Name Type Attributes Description
request Object

The request object that will be sent.

Properties
Name Type Description
document google.firestore.v1.Document

Required. The updated document. Creates the document if it does not already exist.
updateMask google.firestore.v1.DocumentMask

The fields to update. None of the field paths in the mask may contain a reserved name.

If the document exists on the server and has fields not referenced in the mask, they are left unchanged. Fields referenced in the mask, but not present in the input document, are deleted from the document on the server.
mask google.firestore.v1.DocumentMask

The fields to return. If not set, returns all fields.

If the document has a field that is not present in this mask, that field will not be returned in the response.
currentDocument google.firestore.v1.Precondition

An optional precondition on the document. The request will fail if this is set and not met by the target document.
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Promise
  • The promise which resolves to an array. The first element of the array is an object representing Document. The promise has a method named "cancel" which cancels the ongoing API call.

write(optionsopt) → {Stream}

Streams batches of document updates and deletes, in order.

Parameters:
Name Type Attributes Description
options object <optional>

Call options. See CallOptions for more details.
Returns:
Type Description
Stream

An object stream which is both readable and writable. It accepts objects representing WriteRequest for write() method, and will emit objects representing WriteResponse on 'data' event asynchronously.