Question

我在MVC应用程序中收到此错误：

One or more validation errors were detected during model generation:

System.Data.Edm.EdmEntityType: : EntityType 'CustomerModel' has no key defined. Define the key for this EntityType.
System.Data.Edm.EdmEntitySet: EntityType: EntitySet �Customer� is based on type �CustomerModel� that has no keys defined.

我的客户模型如下所示：

public class CustomerModel
{
    public string Name { get; set; }
    public int CustomerID { get; set; }
    public string Address { get; set; }
}

public class CustomerContext : DbContext
{
    public DbSet<CustomerModel> Customer { get; set; }
}

Answer 1

默认情况下，Entity Framework假定您的模型类中存在一个名为Id的键属性。您的密钥属性称为CustomerID，因此Entity Framework无法找到它。

将密钥属性的名称从CustomerID更改为Id，或使用密钥属性修饰CustomerID属性：

public class CustomerModel
{
    public string Name { get; set; }

    [Key]
    public int CustomerID { get; set; }

    public string Address { get; set; }
}

public class CustomerContext : DbContext
{
    public DbSet<CustomerModel> Customer { get; set; }
}

MVC没有密钥定义

1 个答案: