EF Core 使用 Include Join 但 ForeignKey 不是另一个 table 上的主键

EF Core Join using Include but ForeignKey is not Primary Key on the other table

我正在尝试将我的 Table 与另一端的 ForeignKey 和 PrimaryKey 关联起来。但是现在我将使用一个外键,它不是上述 table 的主键。我正在使用 [InverseProperty] 但我认为它有一个错误,因为我已经四处寻找了几个小时,他们都说了同样的事情。

文件 Table:

public class Document
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int DocumentId { get; set; }
    public int ProjectId { get; set; }
    public int DepartmentId { get; set; }
    public int AuthorId { get; set; }

    [NotMapped]
    public virtual User Author { get; set; }
}

用户

public class User
{
    [Key]
    public int UserId { get; set; }
    public int AuthUserId { get; set; }
    public string DisplayName { get; set; }

    [NotMapped]
    [ForeignKey("AuthorId")]
    public virtual Document Document { get; set; }
}

上下文:

modelBuilder.Entity<User>(entity =>
        {
            entity.HasOne(u => u.Document)
            .WithMany("AuthorId");
        });

我正在尝试使用他们 的解决方案,但没有成功。

任何帮助将不胜感激。谢谢!

But now i will be using a ForeignKey which is not the primary for the said table.

为此,您可以使用 EF Core Alternate Keys 功能。但首先更正你的模型 class 设置如下:(如你所说,一个 User 将有多个 Document

public class Document
{
    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int DocumentId { get; set; }
    public int ProjectId { get; set; }
    public int DepartmentId { get; set; }
    public int AuthorId { get; set; }

    public User Author { get; set; }
}

public class User
{
    [Key]
    public int UserId { get; set; }
    public int AuthUserId { get; set; }
    public string DisplayName { get; set; }


    public ICollection<Document> Documents { get; set; }
}

然后在Fluent API配置如下:

modelBuilder.Entity<Document>()
        .HasOne(p => p.Author)
        .WithMany(b => b.Documents)
        .HasForeignKey(p => p.AuthorId)
        .HasPrincipalKey(b => b.AuthUserId); // <-- here you are specifying `AuthUserId` as `PrincipalKey` in the relation which is not primary key