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<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<!-- 配置关于用户收藏表的 MyBatis映射文件 -->
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<!-- namespace：必须与对应的接口全类名一致 id:必须与对应接口的某个对应的方法名一致 -->
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<mapper namespace="com.dao.FavDAO">
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<resultMap type="fav" id="favMap">
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<id property="favid" column="favid" />
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<result property="usersid" column="usersid" />
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<result property="articleid" column="articleid" />
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<result property="addtime" column="addtime" />
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<result property="username" column="username" />
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<result property="title" column="title" />
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<!-- 通过外键关联查询 返回封装Users对象 -->
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<association property="users" column="usersid" select="com.dao.UsersDAO.getUsersById" javaType="com.entity.Users" />
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<!-- 通过外键关联查询 返回封装Article对象 -->
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<association property="article" column="articleid" select="com.dao.ArticleDAO.getArticleById" javaType="com.entity.Article" />
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</resultMap>
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<!-- 用户收藏表 插入SQL语句 FavDAO通过ID(insertFav)调用此配置 -->
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<insert id="insertFav" parameterType="fav">
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insert into fav(favid , usersid , articleid , addtime ) values(#{favid} , #{usersid} , #{articleid} , #{addtime} )
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</insert>
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<!-- 用户收藏表 更新SQL语句 FavDAO通过ID(updateFav)调用此配置 -->
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<update id="updateFav" parameterType="fav">
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update fav set usersid=#{usersid} , articleid=#{articleid} , addtime=#{addtime} where favid=#{favid}
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</update>
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<!-- 用户收藏表 按主键删除SQL语句 FavDAO通过ID(deleteFav)调用此配置 -->
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<delete id="deleteFav" parameterType="String">
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delete from fav where favid = #{favid}
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</delete>
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<!-- 用户收藏表 查询全部用户收藏信息SQL语句 FavDAO通过ID(getAllFav)调用此配置 -->
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<select id="getAllFav" resultMap="favMap">
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select a.* , b.username , c.title from fav a , users b , article c where 1=1 and a.usersid = b.usersid and a.articleid = c.articleid order by favid desc
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</select>
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<!-- 用户收藏表 按主键(favid)查询SQL语句 FavDAO通过ID(getFavById)调用此配置 -->
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<select id="getFavById" parameterType="String" resultMap="favMap">
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select a.* , b.username , c.title from fav a , users b , article c where 1=1 and a.usersid = b.usersid and a.articleid = c.articleid and favid=#{favid} order by favid desc
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</select>
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<!-- 用户收藏表 按条件精确查询SQL语句 FavDAO通过ID(getFavByCond)调用此配置 -->
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<select id="getFavByCond" parameterType="fav" resultMap="favMap">
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select a.* , b.username , c.title from fav a , users b , article c where 1=1 and a.usersid = b.usersid and a.articleid = c.articleid
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<if test="usersid != null and '' != usersid">
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and a.usersid = #{usersid}
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</if>
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<if test="articleid != null and '' != articleid">
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and a.articleid = #{articleid}
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</if>
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<if test="addtime != null and '' != addtime">
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and a.addtime = #{addtime}
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</if>
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</select>
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<!-- 用户收藏表 按条件模糊查询SQL语句 FavDAO通过ID(getFavByLike)调用此配置 -->
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<select id="getFavByLike" parameterType="fav" resultMap="favMap">
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select a.* , b.username , c.title from fav a , users b , article c where 1=1 and a.usersid = b.usersid and a.articleid = c.articleid
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<if test="usersid != null and '' != usersid">
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and b.username like CONCAT('%', CONCAT(#{usersid}, '%'))
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</if>
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<if test="articleid != null and '' != articleid">
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and c.title like CONCAT('%', CONCAT(#{articleid}, '%'))
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</if>
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<if test="addtime != null and '' != addtime">
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and a.addtime like CONCAT('%', CONCAT(#{addtime}, '%'))
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</if>
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</select>
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</mapper>
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