xml问价中查询数据中包含list,需要使用collection resultMap type="com.XXX.XXXX" id column="o_id" jdbcType="BIGINT" property="id" / result column="o_user_id" jdbcType="BIGINT" property="userId" / .... collection property
xml问价中查询数据中包含list,需要使用collection
<resultMap type="com.XXX.XXXX">
<id column="o_id" jdbcType="BIGINT" property="id" />
<result column="o_user_id" jdbcType="BIGINT" property="userId" />
....
<collection property="orderProductList" ofType="com.XXXXXX.XXXXX">
<id column="p_id" jdbcType="BIGINT" property="id" />
<result column="p_order_id" jdbcType="BIGINT" property="orderId" />
....
</collection>
</resultMap>
这样的查询系统封装的通用分页查询是不对的,所以需要自己sql中加入分页解决
<select resultMap="OrderListMap">
SELECT
you.nick_name,
yo.id o_id,
yo.user_id o_user_id
FROM
(
SELECT * FROM
youpin_order
WHERE
1 = 1
<if test="status != null">
and `status` = #{status}
</if>
<if test="page != null and limit != null">
LIMIT #{page},
#{limit}
</if>
) yo
LEFT JOIN XXX yop ON yo.id = yop.order_id
LEFT JOIN XXXX you ON yo.user_id = you.id
</select>
传入参数的时候需要计算
(offset - 1) * limit, limit
总结
以上所述是小编给大家介绍的mysql一对多关联查询分页错误问题的解决方法,希望对大家有所帮助,如果大家有任何疑问请给我留言,小编会及时回复大家的。在此也非常感谢大家对每日运维网站的支持!