new_contents: """Update Calendar index.
  
  Revision ID: 1c73ca99c03b
  Revises: 1d7a72222b7c
  Create Date: 2015-02-26 00:50:52.322510
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '1c73ca99c03b'
  down_revision = '1d7a72222b7c'
  
  from alembic import op
  
  
  def upgrade():
      op.drop_constraint('calendar_ibfk_1', 'calendar', type_='foreignkey')
      op.drop_constraint('uuid', 'calendar', type_='unique')
      op.create_index('uuid', 'calendar',
                      ['namespace_id', 'provider_name', 'name', 'uid'], unique=True)
      op.create_foreign_key('calendar_ibfk_1',
                            'calendar', 'namespace',
                            ['namespace_id'], ['id'])
  
  
  def downgrade():
      op.drop_constraint('calendar_ibfk_1', 'calendar', type_='foreignkey')
      op.drop_constraint('uuid', 'calendar', type_='unique')
      op.create_index('uuid', 'calendar',
                      ['namespace_id', 'provider_name', 'name'], unique=True)
      op.create_foreign_key('calendar_ibfk_1',
                            'calendar', 'namespace',
                            ['namespace_id'], ['id'])
  
subject: Revert "forgot to remove migration"