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# 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 migrate
import sqlalchemy as sql
ROLE_TABLE = 'role'
IMPLIED_ROLE_TABLE = 'implied_role'
def upgrade(migrate_engine):
meta = sql.MetaData()
meta.bind = migrate_engine
role = sql.Table(ROLE_TABLE, meta, autoload=True)
implied_role = sql.Table(IMPLIED_ROLE_TABLE, meta, autoload=True)
fkeys = [
{'columns': [implied_role.c.prior_role_id],
'references': [role.c.id]},
{'columns': [implied_role.c.implied_role_id],
'references': [role.c.id]},
]
# NOTE(stevemar): We need to divide these into two separate loops otherwise
# they may clobber each other and only end up with one foreign key.
for fkey in fkeys:
migrate.ForeignKeyConstraint(columns=fkey['columns'],
refcolumns=fkey['references'],
name=fkey.get('name')).drop()
for fkey in fkeys:
migrate.ForeignKeyConstraint(columns=fkey['columns'],
refcolumns=fkey['references'],
name=fkey.get('name'),
ondelete="CASCADE").create()
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