Question

With SQL I would do the following…

SELECT G.* FROM GOAL G
INNER JOIN Plan P ON
P.planID = G.planID
INNER JOIN User U ON
U.userID = P.userID
WHERE U.userID = @userID

In my Controller (MVC4) "ActionResult Edit" Im doing the following, which is two queries, how could I do just one? The goal is to make sure the user is only able to do the “Edit” action on their own data vs. someone else’s goal.

var plan = db.Plan.Where(b => b.UserID == CurrentUserID).FirstOrDefault();
Goal goal = db.Goals
            .Where(b => b.PlanID == plan.ID)
            .FirstOrDefault();
return View(goal);

Model

public class Plan
{
    public int ID { get; set; }
    [Required]
    public int UserID { get; set; }
}
[Table("PlanGoal")]
public class Goal
{
    public int ID { get; set; }

    [Required]
    public int PlanID { get; set; } 
}

Answer 1

Or you could join Goals and Plan together instead of adding a property to your Goal class:

Goal goal = (from g in db.Goals
            from p in db.Plan
            where p.UserID == CurrentUserID
             && g.PlanID == p.ID
            select g).FirstOrDefault();