spzx/spzx-manager/src/main/resources/mapper/ProductDetailsMapper.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.atguigu.spzx.manger.mapper.ProductDetailsMapper">
    <!-- 用于select查询公用抽取的列 -->
    <sql id="columns">
        id,product_id,image_urls,create_time,update_time,is_deleted
    </sql>

    <!-- 保存数据 -->
    <insert id="save" useGeneratedKeys="true" keyProperty="id">
        insert into product_details (id, product_id, image_urls, create_time, update_time, is_deleted)
        values (#{id}, #{productId}, #{imageUrls}, now(), now(), 0)
    </insert>

    <!-- 修改商品的详情数据 -->
    <update id="updateById">
        update product_details set
        <if test="productId != null and productId != ''">
            product_id = #{productId},
        </if>
        <if test="imageUrls != null and imageUrls != ''">
            image_urls = #{imageUrls},
        </if>
        update_time = now()
        where
        id = #{id}
    </update>

    <!-- 根据商品的id删除商品的详情数据 -->
    <update id="deleteByProductId">
        update product_details
        set update_time = now(),
            is_deleted  = 1
        where product_id = #{productId}
    </update>

    <select id="selectByProductId" resultType="com.atguigu.spzx.model.entity.product.ProductDetails">
        select
        <include refid="columns"/>
        from product_details
        where
        product_id = #{productId}
    </select>
</mapper>