entity framework – 外键组件…不是类型的声明属性

我有以下模型

public class FilanthropyEvent : EntityBase, IDeleteable { public int Id { get; set; } public string Name { get; set; } public DateTime EventDate { get; set; } public string Description { get; set; } public decimal Target { get; set; } public decimal EntryFee { get; set; } public bool Deleted { get; set; } public ICollection EventAttendees { get; set; } } public class Attendee : EntityBase, IDeleteable { public int Id { get; set; } public string Email { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public bool MailingList { get; set; } public bool Deleted { get; set; } public ICollection EventAttendees { get; set; } } 

事件和参与者是多对多的关系，但我需要关联的另一个属性，所以我创建了一个关联实体

  public class EventAttendee : EntityBase { public int FilanthropyEventId { get; set; } public int AttendeeId { get; set; } public bool InActive { get; set; } public virtual Attendee Attendee { get; set; } public virtual FilanthropyEvent FilanthropyEvent { get; set; } } 

这些是每个FilanthropyEvent和Attendee的配置

 public class FilanthropyEventConfiguration : EntityTypeConfiguration { public FilanthropyEventConfiguration() { HasKey(x => x.Id); Property(x => x.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity); HasMany(x => x.EventAttendees).WithRequired(x => x.FilanthropyEvent).HasForeignKey(x => x.FilanthropyEvent); } } public AttendeeConfiguration() { HasKey(x => x.Id); Property(x => x.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity); HasMany(x => x.EventAttendees).WithRequired(x => x.Attendee).HasForeignKey(x => x.AttendeeId); } public class EventAttendeesConfiguration : EntityTypeConfiguration { public EventAttendeesConfiguration() { HasKey(x => new {x.FilanthropyEventId, x.AttendeeId}); } } 

当我尝试通过包管理器控制台中的update-database命令初始化数据库时，出现以下错误。

System.InvalidOperationException：外键组件“FilanthropyEvent”不是“EventAttendee”类型的声明属性。 validation它是否未从模型中明确排除，并且它是有效的原始属性。

我意识到我可能在EventAttendeesConfiguration类中缺少一个映射，但是建立这种关系的正确映射是什么？

Answer 1

这段代码

 HasMany(x => x.EventAttendees) .WithRequired(x => x.FilanthropyEvent) .HasForeignKey(x => x.FilanthropyEvent); 

应该

 HasMany(x => x.EventAttendees) .WithRequired(x => x.FilanthropyEvent) .HasForeignKey(x => x.FilanthropyEventId);