UserSubjectMappingMapper.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.meishu.mapper.UserSubjectMappingMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="com.meishu.model.UserSubjectMappingDO">
        <id column="id" property="id" />
        <result column="create_date" property="createDate" />
        <result column="update_date" property="updateDate" />
        <result column="user_id" property="userId" />
        <result column="class_type" property="classType" />
        <result column="subject_id" property="subjectId" />
        <result column="subject_name" property="subjectName" />
    </resultMap>

    <!-- 通用查询结果列 -->
    <sql id="Base_Column_List">
        create_date,
        update_date,
        id, user_id, class_type, subject_id, subject_name
    </sql>

    <select id="querySubjectTeachers" parameterType="integer" resultType="com.meishu.model.AdministerDO">
        SELECT
            t2.*
        FROM
            user_subject_mapping t
            LEFT JOIN administer t2 ON t.user_id = t2.id
        WHERE
            t.delete_date is null
            and t2.delete_date IS NULL
            AND t.subject_id = #{subjectId}
    </select>

</mapper>