From fa6f980759e9bf810e922ba715ef6e6a64893860 Mon Sep 17 00:00:00 2001
From: Svetlana Shturm <sshturm@mirantis.com>
Date: Fri, 19 Jul 2013 15:55:34 +0400
Subject: [PATCH] Fix missing foreign keys.

There are a lot of ForeignKey that had been skipped in database but
declared in models.
This migration adds them.

bp: ceilometer-db-sync-models-with-migrations

Change-Id: I3e34c3e87b3d3df63971fe9994afc63fe27594f8
---
 .../versions/012_add_missing_foreign_keys.py  | 67 +++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 ceilometer/storage/sqlalchemy/migrate_repo/versions/012_add_missing_foreign_keys.py

diff --git a/ceilometer/storage/sqlalchemy/migrate_repo/versions/012_add_missing_foreign_keys.py b/ceilometer/storage/sqlalchemy/migrate_repo/versions/012_add_missing_foreign_keys.py
new file mode 100644
index 000000000..f95faea58
--- /dev/null
+++ b/ceilometer/storage/sqlalchemy/migrate_repo/versions/012_add_missing_foreign_keys.py
@@ -0,0 +1,67 @@
+# -*- encoding: utf-8 -*-
+#
+#
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+from migrate import ForeignKeyConstraint
+from sqlalchemy import MetaData, Table
+
+TABLES = ['resource', 'sourceassoc', 'user',
+          'project', 'meter', 'source', 'alarm']
+
+INDEXES = {
+    "resource": (('user_id', 'user', 'id'),
+                 ('project_id', 'project', 'id')),
+    "sourceassoc": (('user_id', 'user', 'id'),
+                    ('project_id', 'project', 'id'),
+                    ('resource_id', 'resource', 'id'),
+                    ('meter_id', 'meter', 'id'),
+                    ('source_id', 'source', 'id')),
+    "alarm": (('user_id', 'user', 'id'),
+              ('project_id', 'project', 'id')),
+    "meter": (('user_id', 'user', 'id'),
+              ('project_id', 'project', 'id'),
+              ('resource_id', 'resource', 'id'),)
+}
+
+
+def upgrade(migrate_engine):
+    meta = MetaData(bind=migrate_engine)
+    load_tables = dict((table_name, Table(table_name, meta, autoload=True))
+                       for table_name in TABLES)
+    for table_name, indexes in INDEXES.items():
+        table = load_tables[table_name]
+        for column, ref_table_name, ref_column_name in indexes:
+            ref_table = load_tables[ref_table_name]
+            params = {'columns': [table.c[column]],
+                      'refcolumns': [ref_table.c[ref_column_name]]}
+            if migrate_engine.name == 'mysql':
+                params['name'] = "_".join(('fk', table_name, column))
+            fkey = ForeignKeyConstraint(**params)
+            fkey.create()
+
+
+def downgrade(migrate_engine):
+    meta = MetaData(bind=migrate_engine)
+    load_tables = dict((table_name, Table(table_name, meta, autoload=True))
+                       for table_name in TABLES)
+    for table_name, indexes in INDEXES.items():
+        table = load_tables[table_name]
+        for column, ref_table_name, ref_column_name in indexes:
+            ref_table = load_tables[ref_table_name]
+            params = {'columns': [table.c[column]],
+                      'refcolumns': [ref_table.c[ref_column_name]]}
+            if migrate_engine.name == 'mysql':
+                params['name'] = "_".join(('fk', table_name, column))
+            fkey = ForeignKeyConstraint(**params)
+            fkey.drop()