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94 lines
3.7 KiB
94 lines
3.7 KiB
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE mapper
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PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
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"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
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<!-- 评论表数据映射文件 -->
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<mapper namespace="com.example.mapper.CommentMapper">
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<!-- 定义评论表基础字段列表 -->
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<sql id="Base_Column_List">
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id,user_id,business_id,goods_id,time,content
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</sql>
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<!-- 查询所有评论（关联查询商家、商品和用户信息） -->
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<select id="selectAll" resultType="com.example.entity.Comment">
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select comment.*,
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business.name as businessName, <!-- 商家名称 -->
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goods.img as goodsImg, <!-- 商品图片 -->
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goods.name as goodsName, <!-- 商品名称 -->
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goods.price as goodsPrice, <!-- 商品价格 -->
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goods.unit as goodUnit, <!-- 商品单位 -->
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user.name as userName <!-- 用户昵称 -->
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from comment
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left join business on comment.business_id = business.id <!-- 关联商家表 -->
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left join goods on comment.goods_id = goods.id <!-- 关联商品表 -->
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left join user on comment.user_id = user.id <!-- 关联用户表 -->
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<where>
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<if test="id != null"> and id= #{id}</if>
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<if test="userId != null"> and user_id = #{userId}</if>
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<if test="businessId != null"> and comment.business_id = #{businessId}</if>
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<if test="goodsId != null"> and goods_id = #{goodsId}</if>
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<if test="time != null"> and time = #{time}</if>
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<if test="content != null"> and content like concat('%', #{content}, '%') </if> <!-- 评论内容模糊搜索 -->
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</where>
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</select>
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<!-- 根据ID查询单个评论 -->
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<select id="selectById" resultType="com.example.entity.Comment">
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select
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<include refid="Base_Column_List" />
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from comment
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where id = #{id}
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</select>
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<!-- 根据ID删除评论 -->
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<delete id="deleteById">
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delete from comment
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where id = #{id}
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</delete>
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<!-- 新增评论 -->
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<insert id="insert" parameterType="com.example.entity.Comment" useGeneratedKeys="true">
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insert into comment
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<trim prefix="(" suffix=")" suffixOverrides=",">
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<if test="id != null">id,</if>
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<if test="userId != null">user_id,</if>
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<if test="businessId != null">business_id,</if>
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<if test="goodsId != null">goods_id,</if>
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<if test="time != null">time,</if>
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<if test="content != null">content,</if>
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</trim>
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<trim prefix="values (" suffix=")" suffixOverrides=",">
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<if test="id != null">#{id},</if>
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<if test="userId != null">#{userId},</if>
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<if test="businessId != null">#{businessId},</if>
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<if test="goodsId != null">#{goodsId},</if>
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<if test="time != null">#{time},</if>
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<if test="content != null">#{content},</if>
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</trim>
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</insert>
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<!-- 根据ID修改评论信息 -->
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<update id="updateById" parameterType="com.example.entity.Comment">
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update comment
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<set>
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<if test="userId != null">
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user_id = #{userId},
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</if>
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<if test="businessId != null">
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business_id = #{businessId},
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</if>
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<if test="goodsId != null">
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goods_id = #{goodsId},
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</if>
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<if test="time != null">
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time = #{time},
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</if>
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<if test="content != null">
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content = #{content}, <!-- 评论内容 -->
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</if>
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</set>
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where id = #{id}
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</update>
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</mapper> |