flowable_management/base-fast/src/main/resources/mapper/knowledge/KnowledgeMapper.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.boge.modules.knowledge.service.dao.KnowledgeMapper">

    <!-- 知识文档VO结果映射 -->
    <resultMap id="knowledgeVOMap" type="com.boge.modules.knowledge.service.dto.KnowledgeVO">
        <id column="id" property="id"/>
        <result column="title" property="title"/>
        <result column="subtitle" property="subtitle"/>
        <result column="content" property="content"/>
        <result column="summary" property="summary"/>
        <result column="category_id" property="categoryId"/>
        <result column="author_id" property="authorId"/>
        <result column="author_name" property="authorName"/>
        <result column="cover_image" property="coverImage"/>
        <result column="view_count" property="viewCount"/>
        <result column="like_count" property="likeCount"/>
        <result column="collect_count" property="collectCount"/>
        <result column="version" property="version"/>
        <result column="status" property="status"/>
        <result column="publish_time" property="publishTime"/>
        <result column="expire_time" property="expireTime"/>
        <result column="is_top" property="isTop"/>
        <result column="tags" property="tags"/>
        <result column="create_time" property="createTime"/>
        <result column="update_time" property="updateTime"/>
    </resultMap>

    <!-- 分页查询知识文档列表 -->
    <select id="queryPage" resultMap="knowledgeVOMap">
        SELECT
            k.id,
            k.title,
            k.subtitle,
            k.summary,
            k.category_id,
            k.author_id,
            u.username AS author_name,
            k.cover_image,
            k.view_count,
            k.like_count,
            k.collect_count,
            k.version,
            k.status,
            k.publish_time,
            k.expire_time,
            k.is_top,
            k.tags,
            k.create_time,
            k.update_time
        FROM knowledge k
        LEFT JOIN sys_user u ON k.author_id = u.user_id
        <where>
            <if test="query.title != null and query.title != ''">
                AND k.title LIKE CONCAT('%', #{query.title}, '%')
            </if>
            <if test="query.categoryId != null">
                AND k.category_id = #{query.categoryId}
            </if>
            <if test="query.authorId != null">
                AND k.author_id = #{query.authorId}
            </if>
            <if test="query.status != null and query.status != ''">
                AND k.status = #{query.status}
            </if>
            <if test="query.tag != null and query.tag != ''">
                AND FIND_IN_SET(#{query.tag}, k.tags)
            </if>
            <if test="query.isTop != null">
                AND k.is_top = #{query.isTop}
            </if>
        </where>
        ORDER BY
        <choose>
            <when test="query.orderBy == 'view_count'">
                k.view_count
            </when>
            <when test="query.orderBy == 'like_count'">
                k.like_count
            </when>
            <when test="query.orderBy == 'publish_time'">
                k.publish_time
            </when>
            <otherwise>
                k.create_time
            </otherwise>
        </choose>
        <choose>
            <when test="query.order == 'asc'">
                ASC
            </when>
            <otherwise>
                DESC
            </otherwise>
        </choose>
    </select>

    <!-- 根据ID查询知识文档详情 -->
    <select id="getKnowledgeDetail" resultMap="knowledgeVOMap">
        SELECT
            k.id,
            k.title,
            k.subtitle,
            k.content,
            k.plain_content,
            k.summary,
            k.category_id,
            k.author_id,
            u.username AS author_name,
            k.cover_image,
            k.view_count,
            k.like_count,
            k.collect_count,
            k.version,
            k.status,
            k.publish_time,
            k.expire_time,
            k.is_top,
            k.tags,
            k.create_time,
            k.update_time
        FROM knowledge k
        LEFT JOIN sys_user u ON k.author_id = u.user_id
        WHERE k.id = #{id}
    </select>

    <!-- 增加浏览量 -->
    <update id="increaseViewCount">
        UPDATE knowledge
        SET view_count = view_count + 1
        WHERE id = #{id}
    </update>

    <!-- 增加点赞数 -->
    <update id="increaseLikeCount">
        UPDATE knowledge
        SET like_count = like_count + 1
        WHERE id = #{id}
    </update>

    <!-- 减少点赞数 -->
    <update id="decreaseLikeCount">
        UPDATE knowledge
        SET like_count = CASE WHEN like_count > 0 THEN like_count - 1 ELSE 0 END
        WHERE id = #{id}
    </update>

</mapper>