ruoyi-community/ruoyi-generator/src/main/resources/mapper/community/CommunityCollectionMapper.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.generator.mapper.community.CommunityCollectionMapper">
    <select id="selectUserCollection" resultType="com.ruoyi.generator.vo.CommunityCollectionVo">
        select id,user_id,collection_name,collection_profile,images,collection_tag,is_delete,articleCount,pageViews,create_by,update_by,create_time,update_time,isFollow  from (
        SELECT a.id,
        a.user_id,
        a.collection_name,
        a.collection_profile,
        a.images,
        a.collection_tag,
        a.is_delete,
        COUNT(b.article_id) AS articleCount,
        a.heat AS pageViews,
        a.create_by,
        a.update_by,
        a.create_time,
        a.update_time,
        '0'  as isFollow
        FROM community_collection a
        LEFT JOIN community_collection_article b ON a.id = b.collection_id
        LEFT JOIN community_article c ON b.article_id = c.id
        WHERE a.user_id = #{userId}
        AND (a.is_delete != '1' OR a.is_delete IS NULL)
        <if test="articleId != null and articleId != ''">
            AND b.article_id = #{articleId}
        </if>
        GROUP BY a.id,
        a.user_id,
        a.collection_name,
        a.collection_profile,
        a.images,
        a.collection_tag,
        a.is_delete,
        a.create_by,
        a.update_by,
        a.create_time,
        a.update_time

        union all

        SELECT a.id,
        a.user_id,
        a.collection_name,
        a.collection_profile,
        a.images,
        a.collection_tag,
        a.is_delete,
        COUNT(b.article_id) AS articleCount,
        a.heat AS pageViews,
        a.create_by,
        a.update_by,
        a.create_time,
        a.update_time,
        '1'  as isFollow
        FROM community_collection a
        LEFT JOIN community_collection_article b ON a.id = b.collection_id
        LEFT JOIN community_article c ON b.article_id = c.id
        LEFT JOIN community_collection_user d ON d.collection_id = a.id
        WHERE d.user_id =  #{userId} AND  d.id  is not null
        AND (a.is_delete != '1' OR a.is_delete IS NULL)
        <if test="articleId != null and articleId != ''">
            AND b.article_id = #{articleId}
        </if>
        GROUP BY a.id,
        a.user_id,
        a.collection_name,
        a.collection_profile,
        a.images,
        a.collection_tag,
        a.is_delete,
        a.create_by,
        a.update_by,
        a.create_time,
        a.update_time
        ) A
        <if test="searchType == 1">
          order by  create_time desc
        </if>

        <if test="searchType == 2">
            order by  create_time asc
        </if>
        limit #{offset},#{limit}
    </select>


    <select id="selectCollectById" resultType="com.ruoyi.generator.vo.CommunityCollectionVo">
        select a.id,a.collection_name,a.collection_profile,a.images,a.collection_tag
        from community_collection a
                 left join community_collection_article b on a.id = b.collection_id
        where b.article_id = #{articleId} and (b.is_delete is null or b.is_delete != '1')
    </select>
</mapper>