问题描述
我有一个EF对象:
public class User
{
[Key, Column("userid", TypeName = "int")]
public Int32 UserId { get; set; }
[Column("username", TypeName = "varchar")]
public String UserName { get; set; }
[Column("password", TypeName = "varchar")]
public String Password { get; set; }
[Column("name", TypeName = "varchar")]
public String Name { get; set; }
[Column("surname", TypeName = "varchar")]
public String Surname { get; set; }
[Column("email", TypeName = "varchar")]
public String Email { get; set; }
[Column("dob", TypeName = "datetime")]
public Nullable<DateTime> Dob { get; set; }
[Column("notes", TypeName = "nvarchar")]
public String Notes { get; set; }
[Column("masterentity", TypeName = "varchar")]
public String MasterEntity { get; set; }
[Column("propertyid", TypeName = "int")]
public Nullable<Int32> PropertyId { get; set; }
[Column("boardmember", TypeName = "bit")]
public Boolean BoardMember { get; set; }
[Column("occupiesunit", TypeName = "bit")]
public Boolean OccupiesUnit { get; set; }
[Column("systemuser", TypeName = "bit")]
public Boolean SystemUser { get; set; }
[Column("isactive", TypeName = "bit")]
public Boolean IsActive { get; set; }
#region Foreing Keys
[ForeignKey("MasterEntity")]
public virtual Entity CurrentMasterEntity { get; set; }
#endregion
}
客户端我试图将模型序列化成JSON对象,如下所示:
In client side Im trying to serialize the model into a JSON object like this:
var jsonUser = @(Html.Raw(Json.Encode(this.Model)));
我收到以下错误:
A circular reference was detected while serializing an object of type ....
我意识到,如果我删除 Foreing Keys Fluent API
What I realize is that if I remove the Foreing Keys Fluent API
[ForeignKey("MasterEntity")]
public virtual Entity CurrentMasterEntity { get; set; }
然后它工作完美。所以似乎与其他实体有关系的实体或对象不能使用JSON序列化。
Then it works perfect. So seems that the Entities or Objects that has relations with other Entity cant be serialized using JSON.
任何人都有一个很好的解决方法? IS EF 5.0要解决这个问题?
Anyone has a good approach of solving this? IS EF 5.0 going to solve this issue?
非常感谢。
推荐答案
只要不存在任何循环引用,您可以将序列化关系的实体。这意味着如果您有 A
指向 B
和 B
指向 A
,它不会做。我怀疑你的 CurrentMasterEntity
将永远等于实体本身,或者可以有一个圆形图(A是B到B,B是master到A),所以您有数据错误或双向导航(大多数情况下,它的格式为 Entity Parent
和 ICollection< Entity> Children
)。如果这是数据错误,只需修复它。如果您有双向导航,您将必须选择一个将被序列化的属性,并使用 [ScriptIgnore]
标记另一个属性,以便不会
You can serialize entities with relations as long as there is no circular references between them. This means that if you have A
pointing to B
, and B
pointing back to A
, it won't do. I doubt that your CurrentMasterEntity
would ever be equal to entity itself, or that there ever could be a circular graph (A is master to B, B is master to A), so you have either a data error or bi-directional navigation (most often it comes in form Entity Parent
and ICollection<Entity> Children
). If that is a data error, just fix it. If you have bidirectional navigation you will have to choose one property that will be serialized, and mark other one with [ScriptIgnore]
so it won't be serialized.
但是如果您不需要客户端 CurrentMasterEntity
,只需将其标记为上述 [ScriptIgnore]
。
But if you don't really need CurrentMasterEntity
on client side, just mark it with aforementioned [ScriptIgnore]
.
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