old_contents: """Add User.name column
  
  Revision ID: ad456cec28f4
  Revises: d767d9266a19
  Create Date: 2016-11-21 03:03:08.967762
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'ad456cec28f4'
  down_revision = 'd767d9266a19'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      ### commands auto generated by Alembic - please adjust! ###
      op.add_column('myuser', sa.Column('name', sa.String(length=255), nullable=False))
      ### end Alembic commands ###
  
  
  def downgrade():
      ### commands auto generated by Alembic - please adjust! ###
      op.drop_column('myuser', 'name')
      ### end Alembic commands ###
  
new_contents: """Add User.name column
  
  Revision ID: ad456cec28f4
  Revises: d767d9266a19
  Create Date: 2016-11-21 03:03:08.967762
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'ad456cec28f4'
  down_revision = 'd767d9266a19'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      ### commands auto generated by Alembic - please adjust! ###
      op.add_column('myuser', sa.Column('name', sa.String(length=255), nullable=False, server_default=''))
      ### end Alembic commands ###
  
  
  def downgrade():
      ### commands auto generated by Alembic - please adjust! ###
      op.drop_column('myuser', 'name')
      ### end Alembic commands ###
  
subject: Add column default for User.name column