python - GAE NDB with Endpoints Proto Datastore: filter by ID of reference property -

i created model called building reference model called office. filter buildings officeid in proto rest query (@building.query_method ....)

currently, work office_key property (need enter entity key of office), filter officeid property. ideas on how this?

here's i've tried far:

class building(endpointsmodel):     _message_fields_schema = ('id', 'name', 'office')     name = ndb.stringproperty(default=none, indexed=true)     office_key = ndb.keyproperty(kind=office, required=false)      def office_setter(self, value):         self.office_key = ndb.key('office', value.id)      @endpointsaliasproperty(setter=office_setter, property_type=office.protomodel())     def office(self):         return self.office_key.get()   class office(endpointsmodel):         _message_fields_schema = ('id', 'name', 'created_date')         name = ndb.stringproperty(default=none, indexed=true)         created_date = ndb.datetimeproperty(auto_now_add=true)  @building.query_method(query_fields=('limit', 'order', 'pagetoken', 'office_key'), path='buildings', name='list')     def list(self, query):         return query 

it appears building -> office 1 one relationship (conversely relationship of office -> building many one.

so need store office id in building cached property querying.

then can query buildings specific office id.

alternately query buildings key held in office_key == 'some office key')