text: """change column names
  
  Revision ID: 120dbba24611
  Revises: 89e2dd975e0a
  Create Date: 2021-06-21 01:45:47.267915
  
  """
  from alembic import op
  import sqlalchemy as sa
  
  
  # revision identifiers, used by Alembic.
  revision = '120dbba24611'
  down_revision = '89e2dd975e0a'
  branch_labels = None
  depends_on = None
  
  
  def upgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.alter_column('myblogs', 'user_id',
                 existing_type=sa.INTEGER(),
                 nullable=True)
      # ### end Alembic commands ###
  
  
  def downgrade():
      # ### commands auto generated by Alembic - please adjust! ###
      op.alter_column('myblogs', 'user_id',
                 existing_type=sa.INTEGER(),
                 nullable=False)
      # ### end Alembic commands ###
  