wms-admin/wms-module-system/src/main/resources/mapper/RuleRelationMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
<mapper namespace="top.wms.admin.system.mapper.RuleRelationMapper">


    <delete id="deleteByRuleId" parameterType="top.wms.admin.system.model.entity.RuleRelationDO">
        DELETE FROM equipment_rule_relation
        WHERE 1=1
        <!-- 判空规则：字段不为 null 且 不为空字符串（兼容字符串/数字类型） -->
        <if test="ruleId != null and ruleId != ''">
            AND rule_id = #{ruleId}
        </if>
        <if test="equipmentId != null and equipmentId != ''">
            AND equipment_id = #{equipmentId}
        </if>
        <if test="equipmentRuleId != null and equipmentRuleId != ''">
            AND equipment_rule_id = #{equipmentRuleId}
        </if>
    </delete>

</mapper>