Question
We have the following model in EFCore set up using Table Per Hierarchy (simplified for clarity):
public class User {
public int Id { get; set; }
}
public class Student : User {
public Company Company { get; set; }
}
public class Teacher : User {
public Company School { get; set; }
}
I want to get all users (both Students and Teachers) with all references included. Basically I want to do the following in one query:
_context.Users.OfType<Teacher>().Include(x => x.School);
_context.Users.OfType<Student>().Include(x => x.Company);
Is there a way to do that?
Accepted Answer
From Ivan's comment, current (pre EFCore 2.1) solution is:
var users = _context.Users.Where(_filter_conditions_here).Skip().Take(_if_you_like_);
var userIds = users.Select(x => x.Id).ToList()
_context.Users.OfType<Teacher>().Where(x => userIds.Contain(x.Id)).Include(x => x.School).ToList();
_context.Users.OfType<Student>().Where(x => userIds.Contain(x.Id)).Include(x => x.Company).ToList();
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