Question

运行我的应用程序时出现以下错误：

在模型生成期间检测到一个或多个验证错误：

GuideMedApp.Models.NetworkPrescriber_Patients ::多重性   与角色中的引用约束冲突   ＆＃39; NetworkPrescriber_Patients_Source＆＃39;谈恋爱   ＆＃39; NetworkPrescriber_Patients＆＃39 ;.因为所有的属性   依赖角色是不可为空的，主要角色的多样性   必须是＆＃39; 1＆＃39;。

我试图在实体和NetworkPrescriber＆＃39;之间建立关系。和'＆＃39;患者＆＃39;。 Patient实体有2个指向NetworkPrescriber表的外键。

以下是模型的定义方式：

病人

[Table("Patient")]
public partial class Patient
{
    public long PatientID { get; set; }

    public long? NetworkPrescriberID { get; set; }

    public long? SecondaryNetworkPrescriberID { get; set; }

    public virtual NetworkPrescriber NetworkPrescriber { get; set; }

    public virtual NetworkPrescriber NetworkPrescriber1 { get; set; }

}

NetworkPrescriber

[Table("NetworkPrescriber")]
public partial class NetworkPrescriber
{
    public NetworkPrescriber()
    {
        Patients = new HashSet<Patient>();
        Patients1 = new HashSet<Patient>();

    }

    public long NetworkPrescriberID { get; set; }

    public virtual ICollection<Patient> Patients { get; set; }

    public virtual ICollection<Patient> Patients1 { get; set; }

}

模型配置如下：

    modelBuilder.Entity<NetworkPrescriber>()
                .HasMany(e => e.Patients)
                .WithOptional(e => e.NetworkPrescriber)
                .HasForeignKey(e => e.NetworkPrescriberID);

    modelBuilder.Entity<NetworkPrescriber>()
                .HasMany(e => e.Patients1)
                .WithOptional(e => e.NetworkPrescriber1)
                .HasForeignKey(e => e.SecondaryNetworkPrescriberID);

错误表明模型的定义方式与如何使用流畅的API进行配置之间存在不匹配但我看不到任何错误。如何修复此错误？

Answer 1

尝试添加此配置：

modelBuilder.Entity<Patient>()
   .Property(p => p.NetworkPrescriberID).IsOptional();
modelBuilder.Entity<Patient>()
  .Property(p => p.SecondaryNetworkPrescriberID).IsOptional();

多重性与引用约束Error相冲突

1 个答案: