def downgrade():
### commands auto generated by Alembic - please adjust! ###
op.alter_column('orders', 'createDate',
existing_type=mysql.DATETIME(),
nullable=True)
op.drop_column('goods', 'times')
op.drop_column('goods', 'poster')
op.drop_column('goods', 'address')
op.add_column('comments', sa.Column('goodID', mysql.INTEGER(display_width=11), autoincrement=False, nullable=False))
op.drop_constraint(None, 'comments', type_='foreignkey')
op.create_foreign_key('comments_ibfk_2', 'comments', 'goods', ['goodID'], ['goodID'])
op.alter_column('comments', 'commentatorID',
existing_type=mysql.INTEGER(display_width=11),
nullable=False)
op.drop_column('comments', 'goodsID')
### end Alembic commands ###
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