Class AsyncQuery

Represents a query to the Firestore API.

Instances of this class are considered immutable: all methods that would modify an instance instead return a new instance.

Inheritance

builtins.object > BaseQuery > AsyncQuery

Methods

get

get(transaction: Optional[google.cloud.firestore_v1.transaction.Transaction] = None, retry: google.api_core.retry.Retry = <_MethodDefault._DEFAULT_VALUE: <object object>>, timeout: Optional[float] = None)

Read the documents in the collection that match this query.

This sends a RunQuery RPC and returns a list of documents returned in the stream of RunQueryResponse messages.

Parameters
NameDescription
transaction

(Optional[Transaction]): An existing transaction that this query will run in.

retry google.api_core.retry.Retry

Designation of what errors, if any, should be retried. Defaults to a system-specified policy.

timeout float 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).

The timeout for this request. Defaults to a system-specified value.

Returns
TypeDescription
listThe documents in the collection that match this query.

stream

stream(transaction=None, retry: google.api_core.retry.Retry = <_MethodDefault._DEFAULT_VALUE: <object object>>, timeout: Optional[float] = None)

Read the documents in the collection that match this query.

This sends a RunQuery RPC and then returns an iterator which consumes each document returned in the stream of RunQueryResponse messages.

.. note::

The underlying stream of responses will time out after the max_rpc_timeout_millis value set in the GAPIC client configuration for the RunQuery API. Snapshots not consumed from the iterator before that point will be lost.

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
NameDescription
retry google.api_core.retry.Retry

Designation of what errors, if any, should be retried. Defaults to a system-specified policy.

timeout float :Yields: *DocumentSnapshot* -- The next document that fulfills the query.

The timeout for this request. Defaults to a system-specified value.

transaction

(Optional[Transaction]): An existing transaction that this query will run in.