has_many, through to has_many

I have a situation where I need to get Courses for a particular User. Courses are associated with Divisions that in turn are related to the user by a has_many, through relationship. Ideally, I’d like to stay within the framework and do something like this:

@courses = @user.divisions.courses

Or if I’m looking for a particular course I could do this:

@course = @user.divisions.courses.find(Params[:id])

Is this completely outside of the framework?

Here is the model setup I have:

class User < ActiveRecord::Base

has_many :schedulers

has_many :divisions, :through => :schedulers
end

class Scheduler < ActiveRecord::Base

belongs_to :division
belongs_to :user

end

class Division < ActiveRecord::Base

has_many :schedulers

has_many :users, :through => :schedulers

has_many :courses

end

class Course < ActiveRecord::Base
belongs_to :division

belongs_to :department
end

I managed to get a list of all Courses by adding a function in the User model, but this isn’t ideal for a few reasons, the most important being if I only need to find one Course, I’m forced to retrieve all of the courses and then perform an @
courses.select{yada yada}. There must be a Better Way™! Any ideas?

Hey, thanks for the reply.

It’s a validation check to make sure that the url isn’t spoofed by the user. We don’t want one user editing a course that isn’t associated to them:
www.example.com/course/edit/6

Changed to
www.example.com/course/edit/16