spring-boot-realworld-example-app/src/main/resources/mapper/ArticleFavoriteMapper.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="io.spring.infrastructure.mybatis.mapper.ArticleFavoriteMapper">
    <insert id="insert">
        insert into article_favorites (article_id, user_id) values (#{articleFavorite.articleId}, #{articleFavorite.userId})
    </insert>
    <delete id="delete">
        delete from article_favorites where article_id = #{favorite.articleId} and user_id = #{favorite.userId}
    </delete>
    <select id="find" resultMap="articleFavorite">
        select
          AF.article_id articleFavoriteArticleId,
          AF.user_id articleFavoriteUserId
          from article_favorites AF
          where AF.article_id = #{articleId} and AF.user_id = #{userId}
    </select>
    <resultMap id="articleFavorite" type="io.spring.core.favorite.ArticleFavorite">
        <result column="articleFavoriteArticleId" property="articleId"/>
        <result column="articleFavoriteUserId" property="userId"/>
    </resultMap>
</mapper>