text: # Copyright 2013 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.
  #
  
  """
  Upgrade/downgrade operations for 'community' extensions
  """
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade_l3():
      op.create_table(
          'routers',
          sa.Column('tenant_id', sa.String(length=255), nullable=True),
          sa.Column('id', sa.String(length=36), nullable=False),
          sa.Column('name', sa.String(length=255), nullable=True),
          sa.Column('status', sa.String(length=16), nullable=True),
          sa.Column('admin_state_up', sa.Boolean(), nullable=True),
          sa.Column('gw_port_id', sa.String(length=36), nullable=True),
          sa.ForeignKeyConstraint(['gw_port_id'], ['ports.id'], ),
          sa.PrimaryKeyConstraint('id')
      )
  
      op.create_table(
          'externalnetworks',
          sa.Column('network_id', sa.String(length=36), nullable=False),
          sa.ForeignKeyConstraint(['network_id'], ['networks.id'],
                                  ondelete='CASCADE'),
          sa.PrimaryKeyConstraint('network_id')
      )
  
      op.create_table(
          'floatingips',
          sa.Column('tenant_id', sa.String(length=255), nullable=True),
          sa.Column('id', sa.String(length=36), nullable=False),
          sa.Column('floating_ip_address', sa.String(length=64), nullable=False),
          sa.Column('floating_network_id', sa.String(length=36), nullable=False),
          sa.Column('floating_port_id', sa.String(length=36), nullable=False),
          sa.Column('fixed_port_id', sa.String(length=36), nullable=True),
          sa.Column('fixed_ip_address', sa.String(length=64), nullable=True),
          sa.Column('router_id', sa.String(length=36), nullable=True),
          sa.ForeignKeyConstraint(['fixed_port_id'], ['ports.id'], ),
          sa.ForeignKeyConstraint(['floating_port_id'], ['ports.id'], ),
          sa.ForeignKeyConstraint(['router_id'], ['routers.id'], ),
          sa.PrimaryKeyConstraint('id')
      )
  
  
  def upgrade_quota(options=None):
      if not (options or {}).get('folsom_quota_db_enabled'):
          return
  
      op.create_table(
          'quotas',
          sa.Column('id', sa.String(length=36), nullable=False),
          sa.Column('tenant_id', sa.String(255), index=True),
          sa.Column('resource', sa.String(255)),
          sa.Column('limit', sa.Integer()),
          sa.PrimaryKeyConstraint('id')
      )
  
  
  def downgrade_l3():
      for table in ('floatingips', 'routers', 'externalnetworks'):
          op.drop_table(table)
  
  
  def downgrade_quota(options=None):
      if (options or {}).get('folsom_quota_db_enabled'):
          op.drop_table('quotas')
  