objects: Use common plugin _model_query in get_object

_model_query() composes query that supports rbac, shared attribute and
model hooks.

Change-Id: I5208e6be193e93e565bc0cb1309ff8e4a6adf4a8
Partially-Implements: blueprint adopt-oslo-versioned-objects-for-db

neutron/objects/db/api.py

@@ -13,16 +13,16 @@
 from neutron_lib import exceptions as n_exc
 from oslo_utils import uuidutils
 
-from neutron.db import common_db_mixin
 from neutron import manager
 
 
 # Common database operation implementations
 def get_object(context, model, **kwargs):
+    # TODO(jlibosva): decompose _model_query from plugin instance
+    plugin = manager.NeutronManager.get_plugin()
     with context.session.begin(subtransactions=True):
-        return (common_db_mixin.model_query(context, model)
-                .filter_by(**kwargs)
-                .first())
+        return plugin._model_query(context, model).filter_by(
+            **kwargs).first()
 
 
 def _kwargs_to_filters(**kwargs):

neutron/tests/unit/objects/test_base.py

@@ -273,8 +273,13 @@ class _BaseObjectTestCase(object):
 
     _test_class = FakeNeutronObject
 
+    CORE_PLUGIN = 'neutron.db.db_base_plugin_v2.NeutronDbPluginV2'
+
     def setUp(self):
         super(_BaseObjectTestCase, self).setUp()
+        # TODO(ihrachys): revisit plugin setup once we decouple
+        # neutron.objects.db.api from core plugin instance
+        self.setup_coreplugin(self.CORE_PLUGIN)
         self.context = context.get_admin_context()
         self.db_objs = list(self.get_random_fields() for _ in range(3))
         self.db_obj = self.db_objs[0]
@@ -672,15 +677,6 @@ class BaseDbObjectMultipleForeignKeysTestCase(_BaseObjectTestCase,
 
 
 class BaseDbObjectTestCase(_BaseObjectTestCase):
-
-    CORE_PLUGIN = 'neutron.db.db_base_plugin_v2.NeutronDbPluginV2'
-
-    def setUp(self):
-        super(BaseDbObjectTestCase, self).setUp()
-        # TODO(ihrachys): revisit plugin setup once we decouple
-        # neutron.objects.db.api from core plugin instance
-        self.setup_coreplugin(self.CORE_PLUGIN)
-
     def _create_test_network(self):
         # TODO(ihrachys): replace with network.create() once we get an object
         # implementation for networks