Allow to delete multiple objects with advanced filters

This commit adds a possibility to delete db objects with
advanced filters, like 'in', 'eq', 'has' and so on.

Change-Id: I97bd3a5627f62081a2cb9487cc91920c5a11561b

mistral/db/v2/sqlalchemy/api.py

@@ -259,7 +259,9 @@ def _delete_all(model, **kwargs):
     # NOTE(kong): Because we use 'in_' operator in _secure_query(), delete()
     # method will raise error with default parameter. Please refer to
     # http://docs.sqlalchemy.org/en/rel_1_0/orm/query.html#sqlalchemy.orm.query.Query.delete
-    _secure_query(model).filter_by(**kwargs).delete(synchronize_session=False)
+    query = _secure_query(model)
+    query = db_filters.apply_filters(query, model, **kwargs)
+    query.delete(synchronize_session=False)
 
 
 def _get_collection(model, insecure=False, limit=None, marker=None,

mistral/tests/unit/db/v2/test_sqlalchemy_db_api.py

@@ -2778,6 +2778,26 @@ class EnvironmentTest(SQLAlchemyTest):
             created.name
         )
 
+    def test_delete_environments(self):
+        created0 = db_api.create_environment(ENVIRONMENTS[0])
+        created1 = db_api.create_environment(ENVIRONMENTS[1])
+
+        db_api.delete_environments(
+            name={'in': [created0.name, created1.name]}
+        )
+
+        self.assertRaises(
+            exc.DBEntityNotFoundError,
+            db_api.get_environment,
+            created0.id
+        )
+
+        self.assertRaises(
+            exc.DBEntityNotFoundError,
+            db_api.get_environment,
+            created1.id
+        )
+
     def test_environment_repr(self):
         s = db_api.create_environment(ENVIRONMENTS[0]).__repr__()