Product SKU Inventory DTOs (Dto/SkusDto.cs)

Pager and transfer objects for mall SKUs, filtered by product id or code and including joined product name and code. Reuse for inventory list and SKU save APIs.

// Source: https://github.com/izhaorui/Zr.Admin.NET | License: MIT | Copyright 2021 zrry
// Provided via justclaw.it.com; keep this notice with the code.

namespace ZR.Mall.Model.Dto
{
    /// <summary>
    /// 商品库存查询对象
    /// </summary>
    public class ShoppingSkusQueryDto : PagerInfo
    {
        /// <summary>
        /// 商品ID（按商品筛选）
        /// </summary>
        public long? ProductId { get; set; }

        /// <summary>
        /// 商品编码（按商品编码检索 SKU，业务上通常按编码定位具体商品）
        /// </summary>
        public string ProductCode { get; set; }
    }

    /// <summary>
    /// 商品库存输入输出对象
    /// </summary>
    public class SkusDto
    {
        public long? SkuId { get; set; }

        [Required(ErrorMessage = "商品ID不能为空")]
        public long ProductId { get; set; }

        /// <summary>
   

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