Question

I’m trying to send a variable through a link_to, without using url query in Ruby on Rails, from one controller’s index view to be used on another controller’s index.

Basically, I need to pass the Turma.id (school class id), to the Elementos_turma(peoples in the class) controller, so I can use it and filter the index: ElementosTurma.find(:all, :conditions => { :turma_id => xxxxx } ), to show the peoples of the selected class.

It it possible?
Maybe without using a session variable?
Maybe sending the variable to a method on the 1st controller, to send it the other controller? (if so how? not very RoR wise… 🙂 )

Answer 1

No need for a special method to get the info you need, the magic of routes will do.

In your routes.db file, you should be able to define something like this,

map.resources :class, :has_many => :students

Then if you run ‘rake routes’ you should see a routes similar to this

class_students GET /classes/:class_id/students(.:format)  {:controller=>"students", :action=>"index"}

You can call that path in your view like so

class_students_path(class_id)

Then in your controller you will have access to params[:class_id]

The name of the route isn’t very pretty, but this should work.

EDIT————————————–

According to your comment, you can’t use map.resources for some reason or another…

 map.class_students '/:class_id/students', :controller => 'students', :action => 'index'

That will produce the same route available in your view, same param in your controller.

That being said, I don’t know how a server bug could prohibit you from using map.resources