Load tables of service plugins when migration auto generation

When we run "neutron-db-manage revision --autogenerate", it detects
table deletion of service plugins even when they are configured.
We need to load tables of service plugins to teach alembic such
tables exist.

Change-Id: I9186d36496069c8253683bd200326b80a6565fa6
Closes-Bug: #1218338

diff --git a/neutron/db/migration/alembic_migrations/env.py b/neutron/db/migration/alembic_migrations/env.py
index f3f315bfef47c50080b9a3d505c6a9d51eda355b..d0deaa8ba1ac2cf113976dd31ddfc0a63f7b2e2c 100644 (file)
--- a/neutron/db/migration/alembic_migrations/env.py
+++ b/neutron/db/migration/alembic_migrations/env.py
@@ -40,7 +40,8 @@ plugin_class_path = neutron_config.core_plugin
 active_plugins = [plugin_class_path]
 active_plugins += neutron_config.service_plugins
 
-plugin_klass = importutils.import_class(plugin_class_path)
+for class_path in active_plugins:
+    importutils.import_class(class_path)
 
 # set the target for 'autogenerate' support
 target_metadata = model_base.BASEV2.metadata