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Mybatis中and和循环or混用操作(or转换成in)

Mybatis and和循环or混用

这次项目用到一个and和or混用的场景 , 因为用到多个or(循环), 没想到好的办法

最终转换成用 IN实现:

场景

用left join链接多个表, 多个条件and筛选, 其中状态(state)条件筛选出多个可选状态的条目,

本来想用and 和 or 但是 or的条件是个数组参数, 需要遍历states , 可能0个可能多个, 拼了半天没有成功 , 最后发现用 IN 和FOREACH就可以了

DAO层接口

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List<OrderInfoForm> selectOrdersByStatesSelective(

             @Param(value= "order" ) Order order ,

             @Param(value= "states" ) Integer [] states);

Mybatis实现

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< select id= "selectOrdersByStatesSelective" resultMap= "AllResultMap" >

     select

     <include refid= "All_Column_List" />

     from order_list

     LEFT JOIN product_method ON product_method.`code` = order_list.purchase_method

     LEFT JOIN product_color ON product_color.`code` = order_list.color

     LEFT JOIN product_guarantee ON product_guarantee.`code` = order_list.guarantee

     LEFT JOIN product_info ON order_list.product_id = product_info.id

     LEFT JOIN product_model ON product_info.model = product_model.`code`

     LEFT JOIN product_standard ON product_info.standard = product_standard.`code`

     LEFT JOIN product_state ON product_state.`code` = order_list.order_state

     LEFT JOIN product_apperance ON product_apperance.`code` = order_list.apperance

     LEFT JOIN product_brand ON product_brand.`code` = product_info.brand

     < where >

         <if test= "order.orderNum != null " >

             order_num like "%" #{ order .orderNum,jdbcType= VARCHAR } "%"

         </if>

         <if test= "order.operator != null " >

             and operator like "%" #{ order .operator,jdbcType= VARCHAR } "%"

         </if>

         <if test= "order.purchaseTime != null" >

             and purchase_time = #{ order .purchaseTime,jdbcType= DATE }

         </if>

         <if test= "order.orderState != null" >

             and order_state = #{ order .orderState,jdbcType= VARCHAR }

         </if>

         <if test= "order.serialNum != null" >

             and serial_num like "%" #{ order .serialNum,jdbcType= VARCHAR } "%"

         </if>

        

         <if test= "states != null and states.length >0" >

             <foreach collection= "states" item= "state" separator= "," open = " and order_state in (" close = ")" >

                 #{state,jdbcType= BIGINT }

             </foreach>

         </if>

     </ where >

   </ select >

这里的重点是:

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<if test= "states != null and states.length >0" >

             <foreach collection= "states" item= "state" separator= "," open = " and order_state in (" close = ")" >

                 #{state,jdbcType= BIGINT }

             </foreach>

</if>

把多个state的or关系转化为 states in (state1,state2,state3...)

in中用foreach循环

mybatis plus and 和or合并写法

记录一下and 和 or 混合使用

sql 语句实现

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SELECT   * FROM somc_operation_plan

WHERE ( title LIKE '%测试%' AND ( charge_user = 'xxx' OR execute_user = 'xxx' ) )

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LambdaQueryWrapper<SomcOperationPlan> queryWrapper = new LambdaQueryWrapper<>();

queryWrapper. like (StringUtils.isNotEmpty(operationPlan.getTitle()), SomcOperationPlan::getTitle, operationPlan.getTitle())

         . and (wrapper -> wrapper.eq(StringUtils.isNotEmpty(operationPlan.getChargeUser()), SomcOperationPlan::getChargeUser, operationPlan.getChargeUser()). or ().eq(StringUtils.isNotEmpty(operationPlan.getExecuteUser()), SomcOperationPlan::getExecuteUser, operationPlan.getExecuteUser()));

以上为个人经验,希望能给大家一个参考,也希望大家多多支持。

原文链接:https://blog.csdn.net/q5706503/article/details/86534687

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