dating/src/main/resources/com/bao/dating/mapper/PostFavoriteMapper.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.bao.dating.mapper.PostFavoriteMapper">
    <!--添加动态收藏-->
    <insert id="addPostFavorite">
        insert into post_favorite values (null,#{userId},#{postId},#{createdAt})
    </insert>
    <!--删除动态收藏-->
    <delete id="deletePostFavorite">
        delete from post_favorite where post_id = #{postId}
    </delete>
    <!--查询当前已收藏所有用户-->
    <select id="selectUserIDByPostID" resultType="java.lang.Long">
        SELECT user_id FROM post_favorite WHERE post_id = #{postId}
    </select>

    <!--批量删除动态收藏-->
    <delete id="deleteFavoritesByPostIds">
        DELETE FROM post_favorite
        WHERE post_id IN
        <foreach collection="postIds" item="postId" open="(" close=")" separator=",">
            #{postId}
        </foreach>
    </delete>

</mapper>