iot-gateway/src/main/resources/mappers/noticeMappers/BulletinMapper.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.zsc.edu.gateway.modules.notice.repo.BulletinRepository">
    <resultMap id="BulletinMap" type="com.zsc.edu.gateway.modules.notice.vo.BulletinVo" autoMapping="true">
        <id column="id" jdbcType="BIGINT" property="id"/>
        <result column="title" jdbcType="VARCHAR" property="title"/>
        <result column="state" jdbcType="INTEGER" property="state"/>
        <result column="top" jdbcType="BOOLEAN" property="top"/>
        <result column="edit_time" jdbcType="TIMESTAMP" property="editTime"/>
        <result column="publish_time" jdbcType="TIMESTAMP" property="publishTime"/>
        <result column="close_time" jdbcType="TIMESTAMP" property="closeTime"/>
        <result column="content" jdbcType="VARCHAR" property="content"/>
        <result column="edit_user_id" jdbcType="BIGINT" property="editUserId"/>
        <result column="publish_user_id" jdbcType="BIGINT" property="publishUserId"/>
        <result column="close_user_id" jdbcType="BIGINT" property="closeUserId"/>
        <result column="edit_user_name" jdbcType="VARCHAR" property="editUsername"/>
        <result column="publish_user_name" jdbcType="VARCHAR" property="publishUsername"/>
        <result column="close_user_name" jdbcType="VARCHAR" property="closeUsername"/>
        <result column="file_name" jdbcType="VARCHAR" property="fileName"/>
        <result column="mime_type" jdbcType="VARCHAR" property="mimeType"/>
        <result column="upload_time" jdbcType="TIMESTAMP" property="uploadTime"/>
        <result column="url" jdbcType="VARCHAR" property="url"/>
        <result column="is_read" jdbcType="BOOLEAN" property="isRead"/>
    </resultMap>
    <select id="selectByBulletinId" resultMap="BulletinMap">
        select sb.*,a.id as attachment_id,a.file_name as attachment_file_name,a.mime_type as attachment_mime_type,a.url as attachment_url,a.upload_time as attachment_upload_time,sbu.is_read
        from sys_bulletin sb
                 left join sys_bulletin_attach sba on sb.id=sba.bulletin_id
                 left join attachment a on a.id=sba.attachment_id
                 left join sys_bulletin_user sbu on sb.id=sbu.bulletin_id
                 left join sys_user su on sbu.user_id=su.id
        where sb.id=#{bulletinId}
        order by sb.top DESC, sb.create_time DESC;

    </select>
</mapper>