Question

我有以下课程：

1- PurchaseMaster :Has collection >> PurchaseDetail
2- PurchaseDetail :Has Product
3- Product

我希望购买带有详细信息和产品的PurchaseMaster。我尝试使用undere查询但返回错误：

var purchaseMasterModel = _purchaseMasters
        .Include("StoreMasters.Details")
        .Include("ProductHeader")
        .FirstOrDefault(row => row.Code == code);

var purchaseMasterModel = _purchaseMasters
        .Include("StoreMasters.Details")
        .Include("StoreMasters.Details.ProductHeader")
        .FirstOrDefault(row => row.Code == code);

var purchaseMasterModel = _purchaseMasters
        .Include("StoreMasters.Details")
        .Include("Details.ProductHeader")
        .FirstOrDefault(row => row.Code == code);

我收到了这个错误：

指定的包含路径无效。 EntityType'DataLayer.Context.StoreDetail'不声明名为'ProductHeader'的导航属性。我的课程是这样的：

public class PurchaseMaster:BaseEntity
 {
  public virtual ICollection<PurchaseDetail> PurchaseDetails { get; set; }
 }



 public class PurchaseDetail:BaseEntity
   {
     public PurchaseMaster PurchaseMaster { get; set; }
     public Guid PurchaseMasterId { get; set; }
     public ProductHeader ProductHeader { get; set; }
     public Guid ProductHeaderId { get; set; }
    }

public class ProductHeader:BaseEntity
{
   public virtual ICollection<PurchaseDetail> PurchaseDetails { get; set; }
}

Answer 1

您已选择PurchaseMaster，因此不应指定StoreMaster。

您还必须使用属性名称。 ProductHeader有一个属性 PurchaseDetails ，但没有详细信息。

以下查询应该有效：

var purchaseMasterModel = _purchaseMasters
        .Include("PurchaseDetails")
        .Include("PurchaseDetails.ProductHeader")
        .FirstOrDefault(row => row.Code == code);

在实体框架中加载嵌套集合

1 个答案: