Many to many in separate has_one controller

rubyonrails-talk
1

Hi.

I have a problem deciding the best way to manage a many_to_many relationship.

It define the relationships as so: [code] ## models # student model student has_many subjects :through => :enrollments

# subject model subject has_many students :through => :enrollments

# enrollments model belongs_to :student belongs_to :subject[/code] How can I have a separate controller to manage a students enrollments from one page? Imagine a student page with radio buttons defining their relationship with a subject, something like [enrolled, deferred, cancelled] for example. This would surely be a one_to_one relationship from a routing perspective. My idea was to define this extra controller but I'm quickly thinking I'm going the wrong way with this. [code] map.resources :student, :has_one => :curriculum, :except => [:new, :create][/code] Within the controller and the view, what would the form_for be for? There is no curriculum model, and I can't have a form_for a relationship (can I?).

Thanks in advance.

2

This is part of what has_many :through is for. You already have an enrollments model, so you can just create a controller for it, adding extra attributes where necessary (cancelled, etc.).

-eric