Watch Queries should include documents in parent path on V1 (#7636)

Author: crwilcox

firestore/google/cloud/firestore_v1/watch.py

@@ -352,7 +352,8 @@ def for_query(
         cls, query, snapshot_callback, snapshot_class_instance, reference_class_instance
     ):
         query_target = firestore_pb2.Target.QueryTarget(
-            parent=query._client._database_string, structured_query=query._to_protobuf()
+            parent=query._client._database_string + "/documents",
+            structured_query=query._to_protobuf(),
         )
 
         return cls(

firestore/tests/system.py

@@ -29,7 +29,7 @@
 from google.api_core.exceptions import NotFound
 from google.cloud._helpers import _pb_timestamp_to_datetime
 from google.cloud._helpers import UTC
-from google.cloud import firestore
+from google.cloud import firestore_v1 as firestore
 from test_utils.system import unique_resource_id
 
 from time import sleep