dianshang-houduan/src/main/resources/mappers/TeachingClassStudentMapper.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.sztzjy.linkCommerce.mapper.TeachingClassStudentMapper">
  <resultMap id="BaseResultMap" type="com.sztzjy.linkCommerce.entity.TeachingClassStudent">
    <id column="id" jdbcType="VARCHAR" property="id" />
    <result column="teaching_class_id" jdbcType="VARCHAR" property="teachingClassId" />
    <result column="student_user_id" jdbcType="VARCHAR" property="studentUserId" />
    <result column="admin_class_id" jdbcType="VARCHAR" property="adminClassId" />
    <result column="status" jdbcType="VARCHAR" property="status" />
    <result column="join_reason" jdbcType="VARCHAR" property="joinReason" />
    <result column="join_time" jdbcType="TIMESTAMP" property="joinTime" />
    <result column="exit_time" jdbcType="TIMESTAMP" property="exitTime" />
    <result column="create_time" jdbcType="TIMESTAMP" property="createTime" />
  </resultMap>

  <sql id="Base_Column_List">
    id, teaching_class_id, student_user_id, admin_class_id, status, join_reason, join_time, exit_time, create_time
  </sql>

  <select id="countByTeachingClassId" parameterType="java.lang.String" resultType="java.lang.Long">
    select count(*) from teaching_class_student
    where teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
  </select>

  <select id="countByStudentUserIdAndTeachingClassId" resultType="java.lang.Long">
    select count(*) from teaching_class_student
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
  </select>

  <select id="countByStudentUserIdExcludingTeachingClass" resultType="java.lang.Long">
    select count(*) from teaching_class_student
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
    <if test="teachingClassId != null and teachingClassId != ''">
      and teaching_class_id != #{teachingClassId,jdbcType=VARCHAR}
    </if>
  </select>

  <select id="selectByTeachingClassId" parameterType="java.lang.String" resultMap="BaseResultMap">
    select <include refid="Base_Column_List" />
    from teaching_class_student
    where teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
  </select>

  <select id="selectActiveByStudentUserId" parameterType="java.lang.String" resultMap="BaseResultMap">
    select <include refid="Base_Column_List" />
    from teaching_class_student
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
    order by join_time desc, create_time desc
    limit 1
  </select>

  <select id="selectByStudentUserIdAndTeachingClassId" resultMap="BaseResultMap">
    select <include refid="Base_Column_List" />
    from teaching_class_student
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
    order by create_time desc
    limit 1
  </select>

  <insert id="insertSelective" parameterType="com.sztzjy.linkCommerce.entity.TeachingClassStudent">
    insert into teaching_class_student
    <trim prefix="(" suffix=")" suffixOverrides=",">
      <if test="id != null">id,</if>
      <if test="teachingClassId != null">teaching_class_id,</if>
      <if test="studentUserId != null">student_user_id,</if>
      <if test="adminClassId != null">admin_class_id,</if>
      <if test="status != null">status,</if>
      <if test="joinReason != null">join_reason,</if>
      <if test="joinTime != null">join_time,</if>
      <if test="exitTime != null">exit_time,</if>
      <if test="createTime != null">create_time,</if>
    </trim>
    <trim prefix="values (" suffix=")" suffixOverrides=",">
      <if test="id != null">#{id,jdbcType=VARCHAR},</if>
      <if test="teachingClassId != null">#{teachingClassId,jdbcType=VARCHAR},</if>
      <if test="studentUserId != null">#{studentUserId,jdbcType=VARCHAR},</if>
      <if test="adminClassId != null">#{adminClassId,jdbcType=VARCHAR},</if>
      <if test="status != null">#{status,jdbcType=VARCHAR},</if>
      <if test="joinReason != null">#{joinReason,jdbcType=VARCHAR},</if>
      <if test="joinTime != null">#{joinTime,jdbcType=TIMESTAMP},</if>
      <if test="exitTime != null">#{exitTime,jdbcType=TIMESTAMP},</if>
      <if test="createTime != null">#{createTime,jdbcType=TIMESTAMP},</if>
    </trim>
  </insert>

  <update id="exitActiveByStudentUserIdExceptClass">
    update teaching_class_student
    set status = 'EXITED',
        exit_time = CURRENT_TIMESTAMP
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
      and teaching_class_id != #{teachingClassId,jdbcType=VARCHAR}
  </update>

  <update id="updateMembershipToActive">
    update teaching_class_student
    set status = 'IN_PROGRESS',
        admin_class_id = #{adminClassId,jdbcType=VARCHAR},
        join_reason = #{joinReason,jdbcType=VARCHAR},
        join_time = CURRENT_TIMESTAMP,
        exit_time = null
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
  </update>

  <delete id="deleteByTeachingClassId" parameterType="java.lang.String">
    delete from teaching_class_student
    where teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
  </delete>

  <update id="deleteByStudentUserIdAndTeachingClassId">
    update teaching_class_student
    set status = 'EXITED',
        exit_time = CURRENT_TIMESTAMP
    where student_user_id = #{studentUserId,jdbcType=VARCHAR}
      and teaching_class_id = #{teachingClassId,jdbcType=VARCHAR}
      and status = 'IN_PROGRESS'
  </update>
</mapper>