自定义类型作为主键 [英] Custom Type as Primary Key
问题描述
我目前在Visual Studio 2015上使用EF6代码优先。
我正在使用希望将用户定义类型用作主键的数据库。
I'm currently working with EF6 code-first on Visual Studio 2015. I'm working on a database that I want to use user-defined types as primary keys.
这是我想要的一个简单示例:
This is a simple example of what I want:
public class ObjectIdType
{
public string id { get; set; }
}
这是用户定义的类型。
public class ClasseProva
{
[Key][DatabaseGenerated(DatabaseGeneratedOption.None)]
public ObjectIdType Id { get; set; }
}
这将是我要使用的实体我的自定义类型为PrimaryKey。
And this will be the entity where I want to use my custom type as PrimaryKey.
当我执行此示例操作时,尝试创建控制器时发生错误,错误是:属性类型无效密钥类型。
When I do this like the example an error occur when I try to create the controller, the error is: The property type is not a valid key type.
我发现您只能将标量类型用作PK,但是我想知道是否让我的ObjectIdType继承自String会起作用吗?
我试图这样做(显然不起作用):
I found that you just can use scalar types as PK, but i'm wondering if I make my ObjectIdType inherit from String it will work? I tried to do it like this (obviously don't work):
public class ObjectIdType : String
{
public string id { get; set; }
}
有没有办法将我的ObjectIdType定义为从String继承?还是有任何方法可以使用户定义的类型为PK?
Is there any way to define my ObjectIdType as inheritance from String? Or there is any way to make a user-defined type a PK?
推荐答案
将我的ObjectIdType定义为继承自String的方法?
Is there any way to define my ObjectIdType as inheritance from String?
否。
或者有什么方法可以使用户定义类型为PK?
Or there is any way to make a user-defined type a PK?
不是100%肯定,但是我认为您不能这样做。
Not 100% sure, but i think you can not do that.
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