C＃LINQ包含

Question

I have a problem with Include() in Entity Framework.

I have some entities

public partial class Travel_RequestEmployee
{
 public virtual Traveler Traveler { get; set; }
}

public abstract partial class Traveler{
}

public partial class Traveler_Employee : Traveler
{
 public virtual Employee Employee { get; set; }
}

I want to Include Employee Properties from Travel_RequestEmployee . Is there a way to get Include() working like this?

_context.Travel_RequestEmployee.Include(x => 
x.Traveler.OfType<Traveler_Employee>().Include(e => e.Employee));

Please help me?

Answer 1

You are using the wrong type.

public partial class Travel_RequestEmployee
{
 public virtual Traveler_Employee Traveler { get; set; }
}

notice the switch to Traveler_Employee. Traveler is a base class.