old_contents: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  # Copyright (C) 2013 PolyBeacon, Inc.
  #
  # 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.
  
  """Initial database
  
  Revision ID: caa0c1b6be2
  Revises: None
  Create Date: 2013-08-03 17:41:42.991217
  
  """
  
  from alembic import op
  from sqlalchemy import Boolean
  from sqlalchemy import Column
  from sqlalchemy import DateTime
  from sqlalchemy import Integer
  from sqlalchemy import String
  from sqlalchemy import Text
  from sqlalchemy import UniqueConstraint
  
  revision = 'caa0c1b6be2'
  down_revision = None
  
  agent = (
      'agent',
      Column('id', Integer, primary_key=True, index=True, autoincrement=True),
      Column('created_at', DateTime),
      Column('project_id', String(length=255)),
      Column('updated_at', DateTime),
      Column('user_id', String(length=255)),
      Column('uuid', String(length=255), unique=True),
  )
  
  queue_member = (
      'queue_member',
      Column('id', Integer, primary_key=True, index=True, autoincrement=True),
      Column('created_at', DateTime),
      Column('agent_uuid', String(255)),
      Column('queue_uuid', String(255)),
      Column('updated_at', DateTime),
  
      UniqueConstraint('agent_uuid', 'queue_uuid'),
  )
  
  queue = (
      'queue',
      Column('id', Integer, primary_key=True, index=True, autoincrement=True),
      Column('created_at', DateTime),
      Column('description', Text),
      Column('disabled', Boolean),
      Column('name', String(length=80)),
      Column('project_id', String(length=255)),
      Column('updated_at', DateTime),
      Column('user_id', String(length=255)),
      Column('uuid', String(length=255), unique=True),
  )
  
  tables = [agent, queue_member, queue]
  
  
  def upgrade():
      for table in sorted(tables):
          op.create_table(*table)
  
  
  def downgrade():
      for table in sorted(tables):
          op.drop_table(table[0])
  
new_contents: # vim: tabstop=4 shiftwidth=4 softtabstop=4
  
  # Copyright (C) 2013 PolyBeacon, Inc.
  #
  # 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.
  
  """Initial database
  
  Revision ID: caa0c1b6be2
  Revises: None
  Create Date: 2013-08-03 17:41:42.991217
  
  """
  
  from alembic import op
  from sqlalchemy import Boolean
  from sqlalchemy import Column
  from sqlalchemy import DateTime
  from sqlalchemy import ForeignKeyConstraint
  from sqlalchemy import Integer
  from sqlalchemy import String
  from sqlalchemy import Text
  from sqlalchemy import UniqueConstraint
  
  revision = 'caa0c1b6be2'
  down_revision = None
  
  agent = (
      'agent',
      Column('id', Integer, primary_key=True, index=True, autoincrement=True),
      Column('created_at', DateTime),
      Column('project_id', String(length=255)),
      Column('updated_at', DateTime),
      Column('user_id', String(length=255)),
      Column('uuid', String(length=255), unique=True),
  )
  
  queue_member = (
      'queue_member',
      Column('id', Integer, primary_key=True, index=True, autoincrement=True),
      Column('created_at', DateTime),
      Column('agent_uuid', String(255)),
      Column('queue_uuid', String(255)),
      Column('updated_at', DateTime),
  
      ForeignKeyConstraint(['agent_uuid'], ['agent.uuid'], ),
      ForeignKeyConstraint(['queue_uuid'], ['queue.uuid'], ),
      UniqueConstraint('agent_uuid', 'queue_uuid'),
  )
  
  queue = (
      'queue',
      Column('id', Integer, primary_key=True, index=True, autoincrement=True),
      Column('created_at', DateTime),
      Column('description', Text),
      Column('disabled', Boolean),
      Column('name', String(length=80)),
      Column('project_id', String(length=255)),
      Column('updated_at', DateTime),
      Column('user_id', String(length=255)),
      Column('uuid', String(length=255), unique=True),
  )
  
  tables = [agent, queue_member, queue]
  
  
  def upgrade():
      for table in sorted(tables):
          op.create_table(*table)
  
  
  def downgrade():
      for table in sorted(tables):
          op.drop_table(table[0])
  
subject: add FK constraints to initial migration