From 77c073b743a257781b068552ca2af175c4c2cd30 Mon Sep 17 00:00:00 2001
From: Ann Kamyshnikova <akamyshnikova@mirantis.com>
Date: Fri, 13 Feb 2015 15:52:49 +0300
Subject: [PATCH] Fix usage drop_constraint in 2a1ee2fb59e0 migration

Downgrade for migration 2a1ee2fb59e0_add_mac_address_unique_constraint
fails as it gets wrong parameters name, source and local_cols,
although it expects name, source and type_.

Also as MySQL creates index for unique constraint it should be used
"with migration.remove_fks_from_table".

Closes-bug: #1421631

Change-Id: Id86b2f339a6fb33fc4fd637ffbfc2cb6e75ef4fb
---
 ...2a1ee2fb59e0_add_mac_address_unique_constraint.py | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/neutron/db/migration/alembic_migrations/versions/2a1ee2fb59e0_add_mac_address_unique_constraint.py b/neutron/db/migration/alembic_migrations/versions/2a1ee2fb59e0_add_mac_address_unique_constraint.py
index c5af2d81b..ab8dc1cfe 100644
--- a/neutron/db/migration/alembic_migrations/versions/2a1ee2fb59e0_add_mac_address_unique_constraint.py
+++ b/neutron/db/migration/alembic_migrations/versions/2a1ee2fb59e0_add_mac_address_unique_constraint.py
@@ -27,6 +27,7 @@ down_revision = '41662e32bce2'
 
 from alembic import op
 
+from neutron.db import migration
 
 TABLE_NAME = 'ports'
 CONSTRAINT_NAME = 'uniq_ports0network_id0mac_address'
@@ -41,8 +42,9 @@ def upgrade():
 
 
 def downgrade():
-    op.drop_constraint(
-        name=CONSTRAINT_NAME,
-        source=TABLE_NAME,
-        local_cols=['network_id', 'mac_address']
-    )
+    with migration.remove_fks_from_table(TABLE_NAME):
+        op.drop_constraint(
+            CONSTRAINT_NAME,
+            TABLE_NAME,
+            type_='unique'
+        )
-- 
2.45.2