b19a6deb869d_stack_request_coltype_change.py 文件源码

def downgrade():
    """Downgrade the database to an older revision."""
    # commands auto generated by Alembic - please adjust! ###
    # op.alter_column('stack_analyses_request', 'requestJson',
    #            existing_type=postgresql.JSON(astext_type=postgresql.JSON()),
    #            type_=sa.VARCHAR(length=4096),
    #            existing_nullable=False)
    op.execute('ALTER TABLE stack_analyses_request ALTER COLUMN "requestJson" TYPE varchar(4098) '
               'using CAST("requestJson" as varchar(4098))')
    # end Alembic commands ###