On January 1, 2020 this library will no longer support Python 2 on the latest released version. Previously released library versions will continue to be available. For more information please visit Python 2 support on Google Cloud.

Client

Client for interacting with the Google Cloud Firestore API.

This is the base from which all interactions with the API occur.

In the hierarchy of API concepts

class google.cloud.firestore_v1.client.Client(project=None, credentials=None, database='(default)', client_info=<google.api_core.gapic_v1.client_info.ClientInfo object>, client_options=None)[source]

Bases: google.cloud.client.ClientWithProject

Client for interacting with Google Cloud Firestore API.

Note

Since the Cloud Firestore API requires the gRPC transport, no _http argument is accepted by this class.

Parameters
  • project (Optional[str]) – The project which the client acts on behalf of. If not passed, falls back to the default inferred from the environment.

  • credentials (Optional[Credentials]) – The OAuth2 Credentials to use for this client. If not passed, falls back to the default inferred from the environment.

  • database (Optional[str]) – The database name that the client targets. For now, DEFAULT_DATABASE (the default value) is the only valid database.

  • client_info (Optional[google.api_core.gapic_v1.client_info.ClientInfo]) – The client info used to send a user-agent string along with API requests. If None, then default info will be used. Generally, you only need to set this if you’re developing your own library or partner tool.

  • client_options (Union[dict, google.api_core.client_options.ClientOptions]) – Client options used to set user options on the client. API Endpoint should be set through client_options.

SCOPE = ('https://www.googleapis.com/auth/cloud-platform', 'https://www.googleapis.com/auth/datastore')

The scopes required for authenticating with the Firestore service.

batch()[source]

Get a batch instance from this client.

Returns

A “write” batch to be used for accumulating document changes and sending the changes all at once.

Return type

WriteBatch

collection(*collection_path)[source]

Get a reference to a collection.

For a top-level collection:

>>> client.collection('top')

For a sub-collection:

>>> client.collection('mydocs/doc/subcol')
>>> # is the same as
>>> client.collection('mydocs', 'doc', 'subcol')

Sub-collections can be nested deeper in a similar fashion.

Parameters

collection_path (Tuple[str, ..]) –

Can either be

  • A single /-delimited path to a collection

  • A tuple of collection path segments

Returns

A reference to a collection in the Firestore database.

Return type

CollectionReference

collection_group(collection_id)[source]

Creates and returns a new Query that includes all documents in the database that are contained in a collection or subcollection with the given collection_id.

>>> query = client.collection_group('mygroup')

@param {string} collectionId Identifies the collections to query over. Every collection or subcollection with this ID as the last segment of its path will be included. Cannot contain a slash. @returns {Query} The created Query.

collections()[source]

List top-level collections of the client’s database.

Returns

iterator of subcollections of the current document.

Return type

Sequence[CollectionReference]

document(*document_path)[source]

Get a reference to a document in a collection.

For a top-level document:

>>> client.document('collek/shun')
>>> # is the same as
>>> client.document('collek', 'shun')

For a document in a sub-collection:

>>> client.document('mydocs/doc/subcol/child')
>>> # is the same as
>>> client.document('mydocs', 'doc', 'subcol', 'child')

Documents in sub-collections can be nested deeper in a similar fashion.

Parameters

document_path (Tuple[str, ..]) –

Can either be

  • A single /-delimited path to a document

  • A tuple of document path segments

Returns

A reference to a document in a collection.

Return type

DocumentReference

static field_path(*field_names)[source]

Create a field path from a list of nested field names.

A field path is a .-delimited concatenation of the field names. It is used to represent a nested field. For example, in the data

data = {
   'aa': {
       'bb': {
           'cc': 10,
       },
   },
}

the field path 'aa.bb.cc' represents the data stored in data['aa']['bb']['cc'].

Parameters

field_names (Tuple[str, ..]) – The list of field names.

Returns

The .-delimited field path.

Return type

str

get_all(references, field_paths=None, transaction=None)[source]

Retrieve a batch of documents.

Note

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

Note

If multiple references refer to the same document, the server will only return one result.

See field_path() for more information on field paths.

If a transaction is used and it already has write operations added, this method cannot be used (i.e. read-after-write is not allowed).

Parameters
  • references (List[DocumentReference, ..]) – Iterable of document references to be retrieved.

  • field_paths (Optional[Iterable[str, ..]]) – An iterable of field paths (.-delimited list of field names) to use as a projection of document fields in the returned results. If no value is provided, all fields will be returned.

  • transaction (Optional[Transaction]) – An existing transaction that these references will be retrieved in.

Yields

.DocumentSnapshot – The next document snapshot that fulfills the query, or None if the document does not exist.

transaction(**kwargs)[source]

Get a transaction that uses this client.

See Transaction for more information on transactions and the constructor arguments.

Parameters

kwargs (Dict[str, Any]) – The keyword arguments (other than client) to pass along to the Transaction constructor.

Returns

A transaction attached to this client.

Return type

Transaction

static write_option(**kwargs)[source]

Create a write option for write operations.

Write operations include set(), update() and delete().

One of the following keyword arguments must be provided:

  • last_update_time (google.protobuf.timestamp_pb2.               Timestamp): A timestamp. When set, the target document must

    exist and have been last updated at that time. Protobuf update_time timestamps are typically returned from methods that perform write operations as part of a “write result” protobuf or directly.

  • exists (bool): Indicates if the document being modified

    should already exist.

Providing no argument would make the option have no effect (so it is not allowed). Providing multiple would be an apparent contradiction, since last_update_time assumes that the document was updated (it can’t have been updated if it doesn’t exist) and exists indicate that it is unknown if the document exists or not.

Parameters

kwargs (Dict[str, Any]) – The keyword arguments described above.

Raises

TypeError – If anything other than exactly one argument is provided by the caller.

Returns

The option to be used to configure a write message.

Return type

WriteOption

google.cloud.firestore_v1.client.DEFAULT_DATABASE = '(default)'

The default database used in a Client.

Type

str