Remove code in migration 064 to drop an fkey that does not exist.

Fixes LP bug #907878.

Change-Id: I2e33fe3a58a34c9606b24eafc319afa9fd9a5d86

1 files changed, 0 insertions, 12 deletions

diff --git a/nova/db/sqlalchemy/migrate_repo/versions/064_change_instance_id_to_uuid_in_instance_actions.py b/nova/db/sqlalchemy/migrate_repo/versions/064_change_instance_id_to_uuid_in_instance_actions.py
index bc9519f1b..1370efb55 100644
--- a/nova/db/sqlalchemy/migrate_repo/versions/064_change_instance_id_to_uuid_in_instance_actions.py
+++ b/nova/db/sqlalchemy/migrate_repo/versions/064_change_instance_id_to_uuid_in_instance_actions.py
@@ -32,7 +32,6 @@ def _get_table(name):
 
 def upgrade(migrate_engine):
     meta.bind = migrate_engine
-    dialect = migrate_engine.url.get_dialect().name
     instance_actions = _get_table('instance_actions')
     instances = _get_table('instances')
     uuid_column = Column('instance_uuid', String(36),
@@ -50,17 +49,6 @@ def upgrade(migrate_engine):
         uuid_column.drop()
         raise
 
-    if not dialect.startswith('sqlite'):
-        try:
-            fkey_name = list(instance_actions.c.instance_id.foreign_keys)[0].\
-                             constraint.name
-            ForeignKeyConstraint(columns=[instance_actions.c.instance_id],
-                                 refcolumns=[instances.c.id],
-                                 name=fkey_name).drop()
-        except Exception:
-            logging.error(_("foreign key constraint couldn't be removed"))
-            raise
-
     instance_actions.c.instance_id.drop()