EF Fluent API 遇到困难

Question

我有 4 个这样的表：

public class Table1
{
 public int Id {get;set;}
 public string Name {get;set;}
}

public class Table2
{
 public int Id {get;set;}
 public string Name {get;set;}
 public int Table1Id {get;set;}
 public virtual Table1 {get; set;}
}

public class Table3
{
 public int Id {get;set;}
 public string Name {get;set;}
 public int Table2Id {get;set;}
 public virtual Table2 {get; set;}
}

public class Table4
{
 public int Id {get;set;}
 public string Name {get;set;}
 public int Table3Id {get;set;}
 public virtual Table3 {get; set;}
}

而我的 fluent API 是这样的：

modelBuilder.Entity<Table2>().HasRequired(x => x.Table1).WithMany().WillCascadeOnDelete(false);
modelBuilder.Entity<Table3>().HasRequired(x => x.Table2).WithMany().WillCascadeOnDelete(false);
modelBuilder.Entity<Table4>().HasRequired(x => x.Table3).WithMany().WillCascadeOnDelete(false);

当我尝试播种表时，我收到此错误：

INSERT 语句与 FOREIGN KEY 约束“FK_Table4_Table3_Table3Id. 数据库 MyDb 中发生冲突，表“dbo.Table3”，列“Id”。语句已终止。”

我看不到哪里出错了

Answer 1

这样做...

modelBuilder.Entity<Table2>()
    .HasRequired(t => t.Table1)
    .WithMany() // t => t.AllTable2s)
    .HasForeignKey(t => t.Table1ID);

...最重要的是make it compile！ :)（例如 public virtual Table1 {get; set;} 变成 public virtual Table1 Table1 {get; set;}