主人的快速提问。
我有2个EF模型类:
public class School
{
public int Id { get; set; }
[DisplayName("School")]
public string Name { get; set; }
public List<Teacher> Teachers { get; set; }
public List<Note> Notes { get; set; }
}
public class Teacher
{
public int Id { get; set; }
[DisplayName("Öğretmen")]
public string Name { get; set; }
public int SchoolId { get; set; }
public School School { get; set; }
public List<Note> Notes { get; set; }
}
基本上我想在代码优先创建一对多的关系。
但是当我尝试这样做时,我收到了这个错误:
介绍FOREIGN KEY约束&#39; FK_dbo.Teachers_dbo.Schools_SchoolId&#39;在桌子上&#39;教师&#39;可能会导致循环或多个级联路径。指定ON DELETE NO ACTION或ON UPDATE NO ACTION,或修改其他FOREIGN KEY约束。
我在哪里弄错了?
修改
public class Note
{
public int Id { get; set; }
[Required,DisplayName("Başlık"), StringLength(50)]
public string Title { get; set; }
[Required,DisplayName("Açıklama"), StringLength(4000)]
public string Description { get; set; }
public string File { get; set; }
public DateTime UploadDate { get; set; }
public bool IsApproved { get; set; }
public int SchoolId { get; set; }
public int OwnerId { get; set; }
public int TeacherId { get; set; }
//Keys
public School School { get; set; }
public Teacher Teacher { get; set; }
public List<Comment> Comments { get; set; }
}
我没有收到此模型和密钥的任何错误..
答案 0 :(得分:1)
删除从Note到School的关系,反之亦然。你可以通过与笔记有关系的老师来学校。
它会产生你的问题。