实体框架代码优先 - 同一个表中的两个外键不起作用

Question

我有两个来自同一个表的外键，如下所示：

public class OfferTemplate {    ...
 [ForeignKey("CompanyAgentBuyer_CompanyAgentID")]
 [InverseProperty("OfferTemplatesAsBuyer")]
 public virtual CompanyAgent CompanyAgentBuyer { get; set; }

 [ForeignKey("CompanyAgentBroker_CompanyAgentID")]
 [InverseProperty("OfferTemplatesAsBroker")]
 public virtual CompanyAgent CompanyAgentBroker { get; set; }

 public int CompanyAgentBuyer_CompanyAgentID { get; set; }
 public int? CompanyAgentBroker_CompanyAgentID { get; set; }
 ...
}    

在模型上我得到了这个设置：

modelBuilder.Entity<OfferTemplate>()
            .HasRequired(ca => ca.CompanyAgentBuyer)
            .WithMany(t => t.OfferTemplatesAsBuyer)
            .HasForeignKey(ca => ca.CompanyAgentBuyer_CompanyAgentID)
            .WillCascadeOnDelete(false);

modelBuilder.Entity<OfferTemplate>()
           .HasOptional(ca => ca.CompanyAgentBroker)
           .WithMany(t => t.OfferTemplatesAsBroker)
           .HasForeignKey(ca => ca.CompanyAgentBroker_CompanyAgentID)
           .WillCascadeOnDelete(false);

到目前为止一切正常，除非我进行查询：

var templates = from user in context.UsersInformation
                            from cTemplate in context.OfferTemplates
                            where user.User.Equals(userID) && cTemplate.Company == user.Company
                            select cTemplate;

var x = templates.FirstOrDefault().CompanyAgentBuyer;

正在正确填充ID属性（CompanyAgentBuyer_CompanyAgentID＆amp; CompanyAgentBroker_CompanyAgentID）时，未填充实例（如本例中的x）。我尝试使用Include方法，但它也没有用。我缺少什么想法？

Answer 1

我最终将模型更改为：

        modelBuilder.Entity<CompanyAgent>()
            .HasMany(e => e.OfferTemplatesAsBroker)
            .WithOptional(e => e.CompanyAgentBroker)
            .HasForeignKey(e => e.CompanyAgentBroker_CompanyAgentID);

        modelBuilder.Entity<CompanyAgent>()
            .HasMany(e => e.OfferTemplatesAsBuyer)
            .WithRequired(e => e.CompanyAgentBuyer)
            .HasForeignKey(e => e.CompanyAgentBuyer_CompanyAgentID)
            .WillCascadeOnDelete(false);

现在它正在运作。