LINQ Include on a one-to-many with .Where() not working?

Question

I\'m trying to query Users including each user\'s Interests, but only where an Interest meets certain criteria:

  return db.Users.Include(u => u.Interest         


        

Answer 1

To include only some of the interests you won't be able to use the Include method, as it doesn't support this. You'll need to manually join the Interests with the Users:

var query = from user in db.Users
    join interest in db.Interests.Where(s => s.TenantId == tenantId)
    on user.InterestId equals interest.Id //todo:  will need to be updated
    into interests;
    select new { user, interests};