caimei-mall/src/main/resources/mapper/ShoppingMapper.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.caimei.mapper.products.ShoppingMapper">
    <select id="findAllShop" resultType="com.caimei.entity.CmMallShop" parameterType="int">
        SELECT
          s.*
        FROM
          cm_mall_cart cmc
          LEFT JOIN cm_mall_organize_products cmop ON cmop.id = cmc.productID
          LEFT JOIN product p ON cmop.productID = p.productID
          LEFT JOIN shop s ON p.shopID = s.shopID
        WHERE
          cmc.userID = #{userID}
          AND cmc.delFlag = '0'
        GROUP BY
          s.shopID
        ORDER BY
          MAX(cmc.addTime) DESC
    </select>

    <select id="findAllProducts" resultType="com.caimei.entity.CmMallOrganizeProducts" parameterType="int">
        SELECT
          cmop.*,
          p.mainImage,
          p.name,
          p.unit,
          cmc.productCount
        FROM
          cm_mall_cart cmc
          LEFT JOIN cm_mall_organize_products cmop ON cmop.id = cmc.productID
          LEFT JOIN product p ON cmop.productID = p.productID
        WHERE
          p.shopID = #{shopID}
          AND cmc.userID = #{userID}
          AND cmc.delFlag = '0'
        ORDER BY
          cmc.addTime DESC
    </select>

    <update id="updateNumber" parameterType="com.caimei.entity.CmMallCart">
        UPDATE
          cm_mall_cart
        SET
          productCount = #{productCount}
        WHERE
          userID = #{userID}
          AND productID = #{productID}
    </update>

    <delete id="deleteCart" parameterType="com.caimei.entity.CmMallCart">
        DELETE FROM
          cm_mall_cart
        WHERE
          userID = #{userID}
          AND productID = #{productID}
    </delete>
</mapper>