无法在 LINQ to > 实体查询中构造实体或 > 复杂类型“ChildAccessory”

Question

我想我理解以下错误，但我不知道如何解决它，

"ClassName": "System.NotSupportedException", "Message": "实体或 无法在 LINQ 中构造复杂类型“ChildAccessory”以 实体查询。",

我应该创建一个 DTO 并从存储库中返回它来解决问题还是有更好的解决方法？

我正在尝试获取子配件，但也包括父表中的默认配件。

public class ChildAccessoryRepository: IChildAccessoryRepository {
 private readonly EquipmentContext _context;

 public DirectoryEquipmentRepository(EquipmentContext context) {
  _context = context;
 }

 public IEnumerable < ChildAccessory > GetChildAccessories(Guid clientReference) {
  var accessories = from a in _context.Accessory
  join ca in _context.ChildAccessory
  on new {
   AccessoryId = a.Id, ClientReference = clientReference
  }
  equals new {
   ca.AccessoryId, ca.ClientReference
  }
  into ca_join
  from ca in ca_join.DefaultIfEmpty()
  where
  ca.IsActive == true ||
   ca.IsActive == null
  //select ca;
                         select new ChildAccessory
                                   {
                                       AccessoryId = ca.AccessoryId,
                                       SomeOtherColumn = ca.SomeOtherColumn,
                                       Accessory = ca.Accessory,
                                   });

 }
}

Answer 1

ChildAccessory 有无参数构造函数吗？