Add migration 18 - create the image_locations table

This migration simply creates the new image_locations table. It does
not yet use the table for anything.

Related to bp multiple-image-locations

Change-Id: I1536c9276bc807aac26849e37556b465e8b5c9eb

glance/db/sqlalchemy/migrate_repo/versions/018_add_image_locations_table.py

@@ -0,0 +1,64 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 OpenStack Foundation
+# All Rights Reserved.
+#
+#    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.
+
+import sqlalchemy
+
+from glance.db.sqlalchemy.migrate_repo import schema
+
+
+def upgrade(migrate_engine):
+    meta = sqlalchemy.schema.MetaData(migrate_engine)
+
+    #NOTE(bcwaldon): load the images table for the ForeignKey below
+    sqlalchemy.Table('images', meta, autoload=True)
+
+    image_locations_table = sqlalchemy.Table(
+            'image_locations', meta,
+            sqlalchemy.Column('id',
+                              schema.Integer(),
+                              primary_key=True,
+                              nullable=False),
+            sqlalchemy.Column('image_id',
+                              schema.String(36),
+                              sqlalchemy.ForeignKey('images.id'),
+                              nullable=False,
+                              index=True),
+            sqlalchemy.Column('value',
+                              schema.Text(),
+                              nullable=False),
+            sqlalchemy.Column('created_at',
+                              schema.DateTime(),
+                              nullable=False),
+            sqlalchemy.Column('updated_at',
+                              schema.DateTime()),
+            sqlalchemy.Column('deleted_at',
+                              schema.DateTime()),
+            sqlalchemy.Column('deleted',
+                              schema.Boolean(),
+                              nullable=False,
+                              default=False,
+                              index=True),
+    )
+
+    schema.create_tables([image_locations_table])
+
+
+def downgrade(migrate_engine):
+    meta = sqlalchemy.schema.MetaData(migrate_engine)
+    image_locations_table = sqlalchemy.Table('image_locations', meta,
+                                             autoload=True)
+    schema.drop_tables([image_locations_table])