ruoyi-admin/src/main/resources/mapper/system/SysActivityMapper.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.ruoyi.authentication.mapper.SysActivityMapper">
    <resultMap id="ActivityMap" type="com.ruoyi.authentication.domain.SysActivity">
        <id property="activityId" column="activity_id"/>
        <result property="activityName" column="activity_name"/>
        <result property="rewardBonus" column="reward_bonus"/>
        <result property="conditionValue" column="condition_value"/>
        <result property="startTime" column="start_time"/>
        <result property="endTime" column="end_time"/>
        <result property="status" column="status"/>
        <result property="activityType" column="activity_type"/>
    </resultMap>

    <resultMap id="LeaderboardMap" type="com.ruoyi.authentication.domain.SysActivity$LeaderboardEntry">
        <result property="userId" column="user_id"/>
        <result property="userName" column="user_name"/>
        <result property="score" column="score"/>
    </resultMap>

    <select id="selectActivityList" resultMap="ActivityMap">
        select activity_id, activity_name, reward_bonus, condition_value, start_time, end_time, status, activity_type
        from activity
        where 1=1
        <if test="activityType != null and activityType != ''">and activity_type = #{activityType}</if>
        <if test="status != null">and status = #{status}</if>
    </select>

    <select id="selectActivityById" resultMap="ActivityMap">
        select activity_id, activity_name, reward_bonus, condition_value, start_time, end_time, status, activity_type
        from activity
        where activity_id = #{activityId}
    </select>

    <select id="selectLeaderboard" resultMap="LeaderboardMap">
        select u.user_id, u.user_name, s.score
        from sys_user u
                 join user_score s on u.user_id = s.user_id
        order by s.score desc
            limit 100
    </select>
</mapper>