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C# 实体框架-外键组件&x2026;不是类型的声明属性_C#_.net_Entity Framework_Ef Code First_Code First - Fatal编程技术网

C# 实体框架-外键组件&x2026;不是类型的声明属性

C# 实体框架-外键组件&x2026;不是类型的声明属性,c#,.net,entity-framework,ef-code-first,code-first,C#,.net,Entity Framework,Ef Code First,Code First,我有下面的型号 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 Targe

我有下面的型号

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<EventAttendee> 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<EventAttendee> EventAttendees { get; set; }
}
这些是每个FilanthropyEvent和Attendee的配置

public class FilanthropyEventConfiguration : EntityTypeConfiguration<FilanthropyEvent>
{
       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<EventAttendee>
{
    public EventAttendeesConfiguration()
    {
        HasKey(x => new {x.FilanthropyEventId, x.AttendeeId});
    }
}
公共类FilanthropyEventConfiguration:EntityTypeConfiguration
{
公共文件配置()
{
HasKey(x=>x.Id);
属性(x=>x.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
HasMany(x=>x.EventAttenders)。WithRequired(x=>x.FilanthropyEvent)。HasForeignKey(x=>x.FilanthropyEvent);
}
}
公共配置()
{
HasKey(x=>x.Id);
属性(x=>x.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
HasMany(x=>x.EventAttendes)。WithRequired(x=>x.Attendee)。HasForeignKey(x=>x.AttendeeId);
}
公共类事件与会者配置:EntityTypeConfiguration
{
公共事件与会者配置()
{
HasKey(x=>new{x.filantropyeventid,x.attendeid});
}
}
当我尝试通过package manager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”不是类型“EventAttendee”上声明的属性。验证它是否未从模型中明确排除,并且它是一个有效的基元属性

我意识到我可能在
EventAttendeesConfiguration
类中缺少映射,但是建立这种关系模型的正确映射是什么呢?

此代码

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

HasMany(x => x.EventAttendees)
.WithRequired(x => x.FilanthropyEvent)
.HasForeignKey(x => x.FilanthropyEventId);
Blimey(…)
--应为异常类型。我也做了同样的事
Doh(…)
:(我想这是一个常见的愚蠢错误,也是这样做的,我责备复制和粘贴:)
HasMany(x => x.EventAttendees)
.WithRequired(x => x.FilanthropyEvent)
.HasForeignKey(x => x.FilanthropyEventId);