AIgod_shixi_java/src/main/resources/mapper/RecommendationMapper.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="org.hlrj.duobao_demo.mapper.RecommendationMapper">

    <!-- 通用查询映射结果 -->
    <resultMap id="BaseResultMap" type="org.hlrj.duobao_demo.entity.Recommendation">
        <id column="id" property="id" />
        <result column="image_url" property="imageUrl" />
        <result column="title" property="title" />
        <result column="author" property="author" />
        <result column="publish_time" property="publishTime" />
        <result column="likes" property="likes" />
        <result column="comments" property="comments" />
        <result column="shares" property="shares" />
        <result column="source" property="source" />
        <result column="head" property="head"/>
    </resultMap>

    <!--点赞操作-->
    <update id="addLike" parameterType="org.hlrj.duobao_demo.entity.Recommendation">
            update Recommendation
            <set>
                <if test="imageUrl !=null and imageUrl!=''">
                    image_url=#{imageUrl},
                </if>
                <if test="title !=null and title!=''">
                    title=#{title},
                </if>
                <if test="author !=null and author!=''">
                    author=#{author},
                </if>
                <if test="publishTime !=null and publishTime!=''">
                    publish_time=#{publishTime},
                </if>
                <if test="comments !=null and comments!=''">
                    comments=#{comments},
                </if>
                <if test="shares !=null">
                    shares=#{shares},
                </if>
                <if test="source !=null">
                    source=#{source},
                </if>
                <if test="head !=null and head!=''">
                    head=#{head}
                </if>
                likes = likes + 1
            </set>
            where id = #{id}

    </update>
    <!--更新操作-->
    <update id="updateRecommendation" parameterType="org.hlrj.duobao_demo.entity.Recommendation">
        update Recommendation
        <set>
            <if test="imageUrl !=null and imageUrl!=''">
                image_url=#{imageUrl},
            </if>
            <if test="title !=null and title!=''">
                title=#{title},
            </if>
            <if test="author !=null and author!=''">
                author=#{author},
        </if>
            <if test="publishTime !=null and publishTime!=''">
                publish_time=#{publishTime},
        </if>
            <if test="likes !=null">
                likes=#{likes},
        </if>
            <if test="comments !=null and comments!=''">
                comments=#{comments},
        </if>
            <if test="shares !=null">
                shares=#{shares},
            </if>
            <if test="source !=null">
                source=#{source},
            </if>
            <if test="head !=null and head!=''">
                head=#{head}
            </if>


        </set>
        where id = #{id}

    </update>

</mapper>