如何在实体framefork 6中映射同一类的两个List属性

Question

我的班级

public class DocumentSale 
{
   public List<DocumentSale> FollowDocuments {get; set;}
   public List<DocumentSale> BaseDocuments {get; set;}
}

如何在实体框架上映射它？我收到错误

  

关系“DocumentSaleDocumentSales”的“FK_dbo.DocumentSaleDocumentSales_public.saledocument_DocumentSa”已经存在

我的数据库是postgres 9.4.9

Answer 1

你可以试试这样的事情

public class DocumentSale
{
    [Key]
    public int Id { get; set; }
    public int? FollowDocumentId { get; set; }
    public int? BaseDocumentId { get; set; }

    public virtual DocumentSale FollowDocument { get; set; }
    public virtual DocumentSale BaseDocument { get; set; }

    [ForeignKey(nameof(FollowDocumentId))]
    public virtual List<DocumentSale> FollowDocuments { get; set; }
    [ForeignKey(nameof(BaseDocumentId))]
    public virtual List<DocumentSale> BaseDocuments { get; set; }
}

Answer 2

这就是我所需要的：

public class DocumentSale 
{
   public List<DocumentSale> FollowDocuments {get; set;}
   public List<DocumentSale> BaseDocuments {get; set;}
}

  modelBuilder.Entity<DocumentSale>()
        .HasMany<DocumentSale>(c => c.baseDocuments)
        .WithMany(c => c.followUpDocuments)
        .Map(
        cs =>
            {
                cs.MapLeftKey("followdocid");
                cs.MapRightKey("basedocid");
                cs.ToTable("basefollow");
            }
        );