Question

我使用EF的代码第一种方法。我有以下三个类：

public class Inquiry
{
    public Guid Id { get; set; }
    public string Title { get; set; }
    public string Description { get; set; }
    public virtual ApplicationUser CreatedBy { get; set; }
    public virtual Contractor Contractor { get; set; }
    public IList<ApplicationUser> InquiryUsers { get; set; }
    public IList<InquiryComment> Comments { get; set; }
    public IList<HydroTechEmail> Emails { get; set; } 
    public InquiryState State { get; set; }
    public List<string> Attachments { get; set; } 
    public DateTime? TimeOfCreation { get; set; }
    public DateTime? TimeOfModification { get; set; }
}

public class HydroTechEmail    
{
    public Guid Id { get; set; }
    public string Subject { get; set; }
    public string Content { get; set; }
    public string FromDisplayName { get; set; }
    public string FromAddress { get; set; }
    public List<string> ToDisplayName { get; set; }
    public List<string> ToAddress { get; set; }
    public HydroTechEmailState State { get; set; }
    public DateTime? ReceivedTime { get; set; }
    public virtual List<HydroTechEmailAttachment> Attachments { get; set; }
    public virtual ApplicationUser ApplicationUser { get; set; }
}

public class ApplicationUser
{
    public Guid Id {get;set;}
    public string Firstname {get;set;}
    public string Lastname {get;set;}
}

我认为EF将为关系调查生成一些中间类 - ＆gt;许多电子邮件和查询 - ＆gt;许多应用用户。相反，它在ApplicationUser和HydroTechEmail类中创建了一个外键到Inquiry类。我应该如何创建这一对多的关系？奇怪的是，对于Comments，它创建了一个名为InquiryComments的中间表。

Answer 1

实体框架只会为多对多关系生成中间表。

对于一对多关系，不会创建任何中间表，因为没有必要。

EF一对多的关系

1 个答案: