def _query(self) -> async_query.AsyncQuery:
"""Query factory.
Returns:
:class:`~google.cloud.firestore_v1.query.Query`
"""
return async_query.AsyncQuery(self)
async def stream(
self,
transaction=None
) -> AsyncIterator[async_document.DocumentSnapshot]:
"""Read the documents in this collection.
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).
Args:
transaction (Optional[:class:`~google.cloud.firestore_v1.transaction.\
Transaction`]):
An existing transaction that the query will run in.
Yields:
:class:`~google.cloud.firestore_v1.document.DocumentSnapshot`:
The next document that fulfills the query.
"""
query = async_query.AsyncQuery(self)
async for d in query.stream(transaction=transaction):
yield d # pytype: disable=name-error