text: """empty message
  
  Revision ID: j4d9g3scvf4s
  Revises: k8f2j557gt12
  Create Date: 2019-03-13 13:17:34.1435233
  
  """
  
  # revision identifiers, used by Alembic.
  revision = 'j4d9g3scvf4s'
  down_revision = 'k8f2j557gt12'
  
  from alembic import op
  import sqlalchemy as sa
  
  
  def upgrade():
      # commands auto generated by Alembic - please adjust! ###
      op.add_column('blueprints', sa.Column('expiry_time', sa.DateTime(), nullable=True))
      # end Alembic commands ###
  
  
  def downgrade():
      # commands auto generated by Alembic - please adjust! ###
      op.drop_column('blueprints', 'expiry_time')
      # end Alembic commands ###
  