text: from alembic import op
  import sqlalchemy as sa
  
  """empty message
  
  Revision ID: c0ab21bc488b
  Revises: 72dcf1946d3f
  Create Date: 2017-12-14 13:28:16.602934
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'c0ab21bc488b'
  down_revision = '72dcf1946d3f'
  
  
  def upgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.add_column('tou', sa.Column('active', sa.Boolean(),
                                     server_default='1', nullable=False))
      # ### end Alembic commands ###
  
  
  def downgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.drop_column('tou', 'active')
      # ### end Alembic commands ###
  