MVC viewmodel and a linq query - linq

Question

I finally (after 4 weeks) got a result for a MVC5 project and it went well.
Now I'm trying to "limit" the number of results and it's flagging an error:
'Stoopid' is a type, which is not valid in the given context
'Student' is a type, which is not valid in the given context
Here's the model:
namespace viewModelA
{
public class Teacher
{
public int TeacherId { get; set; }
public string Code { get; set; }
public string Name { get; set; }
}
public class Student
{
public int StudentId { get; set; }
public string Code { get; set; }
public string Name { get; set; }
public string EnrollmentNo { get; set; }
}
public class Stoopid
{
[Key]
public int StoopID { get; set; }
public DateTime stopDt { get; set; }
}
public class ViewModel
{
public IEnumerable<Teacher> Teachers { get; set; }
public IEnumerable<Student> Students { get; set; }
public IEnumerable<Stoopid> Stoopids { get; set; }
}
}
and this is the linq query - notice that Teacher is fine, but Student and Stoopid are NOT. And they are all in the same .cs file. Am I missing something?
var result = (from t in Teacher
join s in Student on t.TeacherId equals s.StudentId
join st in Stoopid on s.StudentId equals st.StoopID
where t.TeacherId == 2
select new
{
TeacherID= t.TeacherId,
Code = t.Code,
t.Name,
s.StudentId,
sCode =s.Code,
sName=s.Name,
stopDt= st.stopDt
})
Edit: I added the relevant code to the HomeController. I also ran this thru LINQPad5 and it works fine so I don't know what's the deal
HomeController

Answer 1

You're referencing the class names in your Linq query, which is why it is throwing that error. You need to reference the actual List objects instead.
var result = (from t in mymodel.Teachers
join s in mymodel.Students on t.TeacherId equals s.StudentId
join st in mymodel.Stoopids on s.StudentId equals st.StoopID
where t.TeacherId == 2
select new
{
TeacherID= t.TeacherId,
Code = t.Code,
t.Name,
s.StudentId,
sCode =s.Code,
sName=s.Name,
stopDt= st.stopDt
})