old_contents: # Copyright 2014 OpenStack Foundation
  #
  #    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.
  #
  
  """FWaaS router insertion
  
  Revision ID: 540142f314f4
  Revises: 4202e3047e47
  Create Date: 2015-02-06 17:02:24.279337
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '540142f314f4'
  down_revision = '4202e3047e47'
  
  from alembic import op
  from oslo_db import exception
  import sqlalchemy as sa
  
  SQL_STATEMENT = (
      "insert into firewall_router_associations "
      "select "
      "f.id as fw_id, r.id as router_id "
      "from firewalls f, routers r "
      "where "
      "f.tenant_id=r.%s"
  )
  
  
  def upgrade():
      op.create_table('firewall_router_associations',
          sa.Column('fw_id', sa.String(length=36), nullable=False),
          sa.Column('router_id', sa.String(length=36), nullable=False),
          sa.ForeignKeyConstraint(['fw_id'], ['firewalls.id'],
              ondelete='CASCADE'),
          sa.ForeignKeyConstraint(['router_id'], ['routers.id'],
              ondelete='CASCADE'),
          sa.PrimaryKeyConstraint('fw_id', 'router_id'),
      )
  
      # Depending on when neutron-fwaas is installed with neutron, this script
      # may be run before or after the neutron core tables have had their
      # tenant_id columns renamed to project_id. Account for both scenarios.
      try:
          op.execute(SQL_STATEMENT % 'tenant_id')
      except exception.DBError:
          op.execute(SQL_STATEMENT % 'project_id')
  
new_contents: # Copyright 2014 OpenStack Foundation
  #
  #    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.
  #
  
  """FWaaS router insertion
  
  Revision ID: 540142f314f4
  Revises: 4202e3047e47
  Create Date: 2015-02-06 17:02:24.279337
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '540142f314f4'
  down_revision = '4202e3047e47'
  
  from alembic import op
  import sqlalchemy as sa
  from sqlalchemy.engine import reflection
  
  SQL_STATEMENT = (
      "insert into firewall_router_associations "
      "select "
      "f.id as fw_id, r.id as router_id "
      "from firewalls f, routers r "
      "where "
      "f.tenant_id=r.%s"
  )
  
  
  def upgrade():
      op.create_table('firewall_router_associations',
          sa.Column('fw_id', sa.String(length=36), nullable=False),
          sa.Column('router_id', sa.String(length=36), nullable=False),
          sa.ForeignKeyConstraint(['fw_id'], ['firewalls.id'],
              ondelete='CASCADE'),
          sa.ForeignKeyConstraint(['router_id'], ['routers.id'],
              ondelete='CASCADE'),
          sa.PrimaryKeyConstraint('fw_id', 'router_id'),
      )
  
      # Depending on when neutron-fwaas is installed with neutron, this script
      # may be run before or after the neutron core tables have had their
      # tenant_id columns renamed to project_id. Account for both scenarios.
      bind = op.get_bind()
      insp = reflection.Inspector.from_engine(bind)
      columns = insp.get_columns('firewall_router_associations')
      if 'tenant_id' in [c['name'] for c in columns]:
          op.execute(SQL_STATEMENT % 'tenant_id')
      else:
          op.execute(SQL_STATEMENT % 'project_id')
  
subject: Fix db migration after project_id changes