Context component:

- corrected slice_unset query filters

src/context/service/database/Slice.py

@@ -13,7 +13,6 @@
 # limitations under the License.
 
 import datetime, logging
-from sqlalchemy import and_
 from sqlalchemy.dialects.postgresql import insert
 from sqlalchemy.engine import Engine
 from sqlalchemy.orm import Session, sessionmaker
@@ -203,20 +202,20 @@ def slice_unset(db_engine : Engine, request : Slice) -> Tuple[Dict, bool]:
     def callback(session : Session) -> bool:
         num_deletes = 0
         num_deletes += session.query(SliceServiceModel)\
-            .filter_by(and_(
+            .filter_by(
                 SliceServiceModel.slice_uuid == slice_uuid,
                 SliceServiceModel.service_uuid.in_(slice_service_uuids)
-            )).delete()
+            ).delete()
         num_deletes += session.query(SliceSubSliceModel)\
-            .filter_by(and_(
+            .filter_by(
                 SliceSubSliceModel.slice_uuid == slice_uuid,
                 SliceSubSliceModel.subslice_uuid.in_(slice_subslice_uuids)
-            )).delete()
+            ).delete()
         num_deletes += session.query(SliceEndPointModel)\
-            .filter_by(and_(
+            .filter_by(
                 SliceEndPointModel.slice_uuid == slice_uuid,
                 SliceEndPointModel.endpoint_uuid.in_(slice_endpoint_uuids)
-            )).delete()
+            ).delete()
         return num_deletes > 0
 
     updated = run_transaction(sessionmaker(bind=db_engine), callback)