linq to entities

Question

我有两张名为
的三张桌子 语言，语言类型，员工

语言类型字段为 LId，LanguageType

语言领域 LId，EmpId，语言流畅

员工的字段是 EmpId，EmpName

语言类型和语言之间的关系一对一，语言和员工表格多对多。问题是当我用语言输入数据时会显示错误

A dependent property in a Referential Constraint is mapped 
to a store-generated column. Column: 'LId'."}.

即使数据是在语言类型中插入的，但在语言表中也没有。 lINQ查询是针对语言表的

public void AddEmpLanguage(Language language, long id)   
{ 
   using (var context = new HRMSEntities())
  {
       Language emp = new Language
       {
            EmpId = id,
            LanguageFluency = language.LanguageFluency,
        };
       context.Language.AddObject(emp);
   }
}

Answer 1

您可以尝试将语言直接添加到员工对象

public void AddEmpLanguage(Language language, long empId)   
{ 
    using (var context = new HRMSEntities())
    {
        Language lang = new Language
        {
            LanguageFluency = language.LanguageFluency,
        };
        var employee = context.Employees.Find(empId);
        /*          or context.Employees.FirstOrDefault(x=>x.ID == empId); */
        if(employee != null){
            employee.Languages.Add(lang);
        }
        context.SaveChanges();
    }
}