创建新表EF编码的困惑 - 首先一对多

Question

我正在创建EF Code-First MVC应用程序。当我第一次开始时，我首先用我知道我需要的表格创建数据库。现在我遇到了需要添加另一个表格的情况。在过去，我通常先做EF Database-First，然后在SSMS中创建表格并更新我的EDMX，但我想扩展我的知识并开始执行Code-First项目。

因此，我需要创建的表格被称为Event，该表格将链接到已创建的另一个表格，称为ApplicantInformation。

关系是1事件可以有许多申请人信息 - Event 1 ... * ApplicantInformation。

下面是我创建了我Event类：

public class Event 
{ 
    [Key] 
    public int Id { get; set; } 
    public string EventName { get; set; } 
    public bool Active { get; set; } 
} 

这里是我ApplicantInformation类：

[Table("ApplicantInformation")] 
public partial class ApplicantInformation 
{ 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")] 
    public ApplicantInformation() 
    { 
     Events = new HashSet<Event>(); 
    } 
    public int ID { get; set; } 

    public string FirstName { get; set; } 

    public string LastName { get; set; } 

    public int City { get; set; } 

    public int State { get; set; } 
    public string EmailAddress { get; set; } 

    public bool Active { get; set; } 
    public DateTime DateEntered { get; set; } 
    public int EventId { get; set; } 

    [ForeignKey("EventId")] 
    public Event Event { get; set; } 

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")] 
    public virtual ICollection<Event> Events { get; set; } 
} 

当我add-migration我看到这一点：

public override void Up() 
    { 
     CreateTable(
      "dbo.Events", 
      c => new 
       { 
        Id = c.Int(nullable: false, identity: true), 
        EventName = c.String(), 
        Active = c.Boolean(nullable: false), 
        ApplicantInformation_ID = c.Int(), // where does this come from? 
       }) 
      .PrimaryKey(t => t.Id) 
      .ForeignKey("dbo.ApplicantInformation", t => t.ApplicantInformation_ID) // where did ApplicantInformation_ID come from? 
      .Index(t => t.ApplicantInformation_ID); // again, where did this property come from? 

     AddColumn("dbo.ApplicantInformation", "EventId", c => c.Int(nullable: false)); 
     CreateIndex("dbo.ApplicantInformation", "EventId"); 
     AddForeignKey("dbo.ApplicantInformation", "EventId", "dbo.Events", "Id", cascadeDelete: true); 
     DropColumn("dbo.ApplicantInformation", "CareerEvent"); 
    } 

我的问题（如果你没有阅读评论），是在哪里从哪里来？我显然没有把这个属性放在我的Event类中？

任何帮助表示赞赏。

UPDATE

这样我就可以得到我的ApplicantInformation类摆脱ICollection<Event>和构造的，它仍然是一个一对多的关系？

public class Event 
{ 
    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")] 
    public Event() 
    { 
     ApplicantInformations = new HashSet<ApplicantInformation>(); 
    } 

    [Key] 
    public int Id { get; set; } 
    public string EventName { get; set; } 
    public bool Active { get; set; } 

    [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2227:CollectionPropertiesShouldBeReadOnly")] 
    public virtual ICollection<ApplicantInformation> ApplicantInformations { get; set; } 
} 

[Table("ApplicantInformation")] 
public partial class ApplicantInformation 
{ 
    public int ID { get; set; } 

    public string FirstName { get; set; } 

    public string LastName { get; set; } 

    public int City { get; set; } 

    public int State { get; set; } 
    public string EmailAddress { get; set; } 

    public bool Active { get; set; } 
    public DateTime DateEntered { get; set; } 
    public int EventId { get; set; } 

    [ForeignKey("EventId")] 
    public Event Event { get; set; } 
} 

迁移：

public override void Up() 
    { 
     CreateTable(
      "dbo.Events", 
      c => new 
       { 
        Id = c.Int(nullable: false, identity: true), 
        EventName = c.String(), 
        Active = c.Boolean(nullable: false), 
       }) 
      .PrimaryKey(t => t.Id); 

     AddColumn("dbo.ApplicantInformation", "EventId", c => c.Int(nullable: false)); 
     CreateIndex("dbo.ApplicantInformation", "EventId"); 
     AddForeignKey("dbo.ApplicantInformation", "EventId", "dbo.Events", "Id", cascadeDelete: true); 
     DropColumn("dbo.ApplicantInformation", "CareerEvent"); 
    } 

Answer 1

每伊万在评论部分：

我明白，但你可能已经把错误的收集上错了地方。规则很简单 - 您将集合导航属性放在一侧，并在多侧放置参考导航属性。您描述期望的关系的方式，收集应该是公众ICollection Applicants {get;组;在Event类中。

这正是我的问题。