text: # Copyright 2015 mirantis Inc.
  # 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.
  
  """add public column for share
  
  Revision ID: 30cb96d995fa
  Revises: ef0c02b4366
  Create Date: 2015-01-16 03:07:15.548947
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '30cb96d995fa'
  down_revision = 'ef0c02b4366'
  
  from alembic import op
  from oslo_log import log
  import sqlalchemy as sa
  
  LOG = log.getLogger(__name__)
  
  
  def upgrade():
      try:
          op.add_column('shares', sa.Column('is_public', sa.Boolean,
                                            default=False))
      except Exception:
          LOG.error("Column shares.is_public not created!")
          raise
  
  
  def downgrade():
      try:
          op.drop_column('shares', 'is_public')
      except Exception:
          LOG.error("Column shares.is_public not dropped!")
          raise
  