Question

我有一种不寻常的情况，我们正在使用EF从现有的数据存储迁移到Sql。对于一个实体，我具有类似于以下的属性：

public class User : Entity
{
  [NotMapped] //this is the original collection from old data store
  public IList<Foo> Things
  {
    get { return _things.ToList().AsReadonly(); }
    set { _things = value.ToList(); }
  }

  //this is the new ef presentation of the original collection
  public ICollection<Foo> TheThings
  {
    get { return _things; }
    set { _things = value.ToList(); }
  }

  [NotMapped]
  //this is the original collection from old data store,
  //but just a List<string>
  public IList<string> OtherThings
  {
    get { return _otherThings.AsReadonly(); }
    set { _things = _otherThings.ToList(); }
  }

  //this is the new ef presentation of the original collection,
  //I can't store a List<string> in sql so I have to wrap it in a class
  public ICollection<ThingWrapper> TheOtherThings
  {
    get { return _otherThings.Select(x => new ThingWrapper(x)).ToList(); }
    set { _otherThings= value.Select(x => x.Value).ToList(); }
  }
}

public class ThingWrapper : Entity
{
  public ThingWrapper(string value) { this.Value = value; }
  public string Value { get; set; }
  public virtual User User { get; set; }
}

public class Foo : Entity
{
  public SomeOtherComplexType AThing { get; set; }
  public virtual User User { get; set; }
}


var user = DbSet<User>.Include(x => x.TheThings).Include(x => x.TheOtherThings).SingleOrDefault(x => x.Id == someId);

在上面的示例中，我最终得到的用户对象的“ TheThings”集合正确填充，但“ TheOtherThings”集合为空。因此Foo类可以正常返回，而ThingWrapper类则不能。

我的问题是为什么？

具有多个子集合的实体未填充所有子集合

0 个答案: