old_contents: """empty message
  
  Revision ID: 44dab62dfff7
  Revises: 162b4fa5836a
  Create Date: 2016-09-21 15:30:43.609986
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '44dab62dfff7'
  down_revision = '162b4fa5836a'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      op.add_column('user', sa.Column('shape', sa.TEXT(), nullable=True))
  
  
  def downgrade():
      op.drop_column('user', 'shape')
  
new_contents: """add a shape for the user
  
  Revision ID: 44dab62dfff7
  Revises: 162b4fa5836a
  Create Date: 2016-09-21 15:30:43.609986
  
  """
  
  # revision identifiers, used by Alembic.
  revision = '44dab62dfff7'
  down_revision = '162b4fa5836a'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      op.add_column('user', sa.Column('shape', sa.TEXT(), nullable=True))
  
  
  def downgrade():
      op.drop_column('user', 'shape')
  
subject: add migration message