<?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.ruoyi.project.benyi.mapper.ByTrainVideoMapper">
    
    <resultMap type="ByTrainVideo" id="ByTrainVideoResult">
        <result property="id"    column="id"    />
        <result property="title"    column="title"    />
        <result property="information"    column="information"    />
        <result property="lecturer"    column="lecturer"    />
        <result property="lecturername"    column="lecturername"    />
        <result property="videourl"    column="videourl"    />
        <result property="filetype"    column="filetype"    />
        <result property="type"    column="type"    />
        <result property="classtype"    column="classtype"    />
        <result property="createuserid"    column="createuserid"    />
        <result property="createtime"    column="createtime"    />
        <result property="avgscore"    column="avgscore"    />
    </resultMap>

    <sql id="selectByTrainVideoVo">
        select id, title, information, lecturer,(select name from by_lecturer where lecturer=by_lecturer.id) as lecturername, videourl,filetype, type, classtype, createuserid, createtime,
        (select avg(score) from by_train_video_score where by_train_video_score.videoid=by_train_video.id) avgscore
        from by_train_video
    </sql>

    <select id="selectByTrainVideoList" parameterType="ByTrainVideo" resultMap="ByTrainVideoResult">
        <include refid="selectByTrainVideoVo"/>
        <where>  
            <if test="title != null  and title != ''"> and title like concat('%', #{title}, '%')</if>
            <if test="information != null  and information != ''"> and information = #{information}</if>
            <if test="lecturer != null "> and lecturer = #{lecturer}</if>
            <if test="videourl != null  and videourl != ''"> and videourl = #{videourl}</if>
            <if test="filetype != null  and filetype != ''"> and filetype = #{filetype}</if>
            <if test="type != null  and type != ''"> and type like concat('', #{type}, '%')</if>
            <if test="classtype != null  and classtype != ''"> and classtype = #{classtype}</if>
            <if test="createuserid != null "> and createuserid = #{createuserid}</if>
            <if test="createtime != null "> and createtime = #{createtime}</if>
        </where>
    </select>
    
    <select id="selectByTrainVideoById" parameterType="Long" resultMap="ByTrainVideoResult">
        <include refid="selectByTrainVideoVo"/>
        where id = #{id}
    </select>
        
    <insert id="insertByTrainVideo" parameterType="ByTrainVideo" useGeneratedKeys="true" keyProperty="id">
        insert into by_train_video
        <trim prefix="(" suffix=")" suffixOverrides=",">
            <if test="title != null  and title != ''">title,</if>
            <if test="information != null  and information != ''">information,</if>
            <if test="lecturer != null ">lecturer,</if>
            <if test="videourl != null  and videourl != ''">videourl,</if>
            <if test="filetype != null  and filetype != ''">filetype,</if>
            <if test="type != null  and type != ''">type,</if>
            <if test="classtype != null  and classtype != ''">classtype,</if>
            <if test="createuserid != null ">createuserid,</if>
            <if test="createtime != null ">createtime,</if>
         </trim>
        <trim prefix="values (" suffix=")" suffixOverrides=",">
            <if test="title != null  and title != ''">#{title},</if>
            <if test="information != null  and information != ''">#{information},</if>
            <if test="lecturer != null ">#{lecturer},</if>
            <if test="videourl != null  and videourl != ''">#{videourl},</if>
            <if test="filetype != null  and filetype != ''">#{filetype},</if>
            <if test="type != null  and type != ''">#{type},</if>
            <if test="classtype != null  and classtype != ''">#{classtype},</if>
            <if test="createuserid != null ">#{createuserid},</if>
            <if test="createtime != null ">#{createtime},</if>
         </trim>
    </insert>

    <update id="updateByTrainVideo" parameterType="ByTrainVideo">
        update by_train_video
        <trim prefix="SET" suffixOverrides=",">
            <if test="title != null  and title != ''">title = #{title},</if>
            <if test="information != null  and information != ''">information = #{information},</if>
            <if test="lecturer != null ">lecturer = #{lecturer},</if>
            <if test="videourl != null  and videourl != ''">videourl = #{videourl},</if>
            <if test="filetype != null  and filetype != ''">filetype = #{filetype},</if>
            <if test="type != null  and type != ''">type = #{type},</if>
            <if test="classtype != null  and classtype != ''">classtype = #{classtype},</if>
            <if test="createuserid != null ">createuserid = #{createuserid},</if>
            <if test="createtime != null ">createtime = #{createtime},</if>
        </trim>
        where id = #{id}
    </update>

    <delete id="deleteByTrainVideoById" parameterType="Long">
        delete from by_train_video where id = #{id}
    </delete>

    <delete id="deleteByTrainVideoByIds" parameterType="String">
        delete from by_train_video where id in 
        <foreach item="id" collection="array" open="(" separator="," close=")">
            #{id}
        </foreach>
    </delete>
    
</mapper>