How do you scope ActiveRecord associations in Rails 3?

Question

I have a Rails 3 project. With Rails 3 came Arel and the ability to reuse one scope to build another. I am wondering if there is a way to use scopes when defining a relationsh

Answer 1

If you're just trying to get the user's orders, why don't you just use the relationship?

Presuming that the current user is accessible from the current_user method in your controller:

@my_orders = current_user.orders

This ensures only a user's specific orders will be shown. You can also do arbitrarily nested joins to get deeper resources by using joins

current_user.orders.joins(:level1 => { :level2 => :level3 }).where('level3s.id' => X)