我正在制定一些守则,通过EF4.3使用单桌遗产。
有一个名为“用户”的实体和另一个名为“行政”的实体。管理从用户那里继承。
<强 > 用户级
public class User
{
public int Id {get;set;}
public string Username {get;set;}
}
<强度 > 管理等级
public class Admin : User { }
EF 生成数据库表格时带有 disriminator 列。当添加 Admin 记录时, disriminator="Admin" 和用户记录中将具有 disriminator="用户" 。
我的问题是,如果我想将 用户 输入和 Admin ,我如何更新 Disriminator 栏?
我尝试从一个对象类型到另一个对象类型,并使用 EF 保存,但这并不改变争议列。 我如何改变它?
谢谢你的帮助
对象永远无法更改其类型。 如果您打算更改用户的“ 管理员” 设置( 合理), 您应该使用属性/ 财产而不是类型名称来进行此项操作 。
例如,您可以在 User 对象与 Administator 对象之间有关联,而不是希望 replace User 对象与 Administator 子类型有关联。
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