实体框架-CF-外键映射到不同的列

Question

I'm using ASP.NET Identity in my project so my AspNetUser table looks somewhat like this:

public class AspNetUser
{
    [Key, Index(IsUnique = true), DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public Guid Id { get; set; }

    [Index(IsUnique = true), DatabaseGenerated(DatabaseGeneratedOption.None)]
    public int InternalId { get; set; }

    // Navigation properties
    public virtual ICollection<RequestHistory> RequestHistories { get; set; }
}

I've added InternalId to use as foreign key in my custom tables because i don't like using Guids everywhere. So, let's take this table for example:

public class RequestHistory
{
    [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int Id { get; set; }

    public int? UserId { get; set; }

    // Navigation properties
    [ForeignKey("UserId")]
    public virtual AspNetUser User { get; set; }
}

Looks good so far, RequestHistory should have navigation property to AspNetUser running on RequestHistory.UserId = AspNetUser.InternalId and vice versa. But when i try to run my project i get an error saying:

RequestHistory_User_Target_RequestHistory_User_Source: : The types of all properties in the Dependent Role of a referential constraint must be the same as the corresponding property types in the Principal Role. The type of property 'UserId' on entity 'RequestHistory' does not match the type of property 'Id' on entity 'AspNetUser' in the referential constraint 'RequestHistory_User'.

Which makes sense because EF is propably trying to match them using the default behaviour but how can i force this association to use InternalId as foreign key from AspNetUser table?

Answer 1

您需要在RequestHistory上将外键设置为InternalId而不是UserId。