backend_code/target/classes/mapper/template/SmartVisitorMapper.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="com.template.mapper.SmartVisitorMapper">
    <resultMap type="com.template.model.vo.VisitorPageVo" id="visitorPageMap">
        <result property="id" column="id"/>
        <result property="userId" column="user_id"/>
        <result property="userName" column="user_name"/>
        <result property="createTime" column="create_time"/>
        <result property="statu" column="statu"/>
        <result property="visitorTime" column="visitor_time"/>
        <result property="visitReason" column="visit_reason"/>
    </resultMap>

    <select id="queryVisitorPage" resultType="com.template.model.vo.VisitorPageVo" resultMap="visitorPageMap">
        select sv.id,sv.user_id,su.name as user_name,sv.create_time,sv.statu,sv.visitor_time,sv.visit_reason from
        smart_visitor sv
        left join smart_user su on su.deleted = 0 and sv.user_id = su.id
        where sv.deleted = 0
        <if test="userId != null and userId != ''">
            and sv.user_id = #{userId}
        </if>

        <if test="statu != null and statu != ''">
            and sv.statu = #{statu}
        </if>
    </select>


</mapper>