def make_kind_stats_query(namespace, kind, latest_timestamp):
"""Make a Query to fetch the latest kind statistics."""
kind_stat_query = query_pb2.Query()
if namespace is None:
kind_stat_query.kind.add().name = '__Stat_Kind__'
else:
kind_stat_query.kind.add().name = '__Stat_Ns_Kind__'
kind_filter = datastore_helper.set_property_filter(
query_pb2.Filter(), 'kind_name', PropertyFilter.EQUAL, unicode(kind))
timestamp_filter = datastore_helper.set_property_filter(
query_pb2.Filter(), 'timestamp', PropertyFilter.EQUAL,
latest_timestamp)
datastore_helper.set_composite_filter(kind_stat_query.filter,
CompositeFilter.AND, kind_filter,
timestamp_filter)
return kind_stat_query
def query(self):
# Instantiate a filter protobuf
# You MUST instantiate the filter before the query, then instantiate
# the query with the filter.
filter_pb = query_pb2.Filter()
# Get all non-deleted model instances
helper.set_property_filter(filter_pb, 'deleted',
query_pb2.PropertyFilter.EQUAL, False)
# Instantiate a query protobuf
query_pb = query_pb2.Query(filter=filter_pb)
helper.set_kind(query_pb, self.model)
return query_pb
