How can I call different controllers from routes.rb - ruby-on-rails-3

Question

I'm just struggling a few hours with a problem, that seems rather easy, but not for me and not for google :)
I put some routes via
scope :path => '/:mandate_key', :controller => :tasks do
get '/' => :index #mandate_path
match '/import' => "import#index"
match '/clearance' => "clearance#index"
end
So far, so ugly! I'm looking for a way to call different controllers (import and clearance) dependent on the second param. Something like this:
scope :path => '/:mandate_key', :controller => :tasks do
get '/' => :index
scope :path => ':task_key', :controller => %{'task_key'}
get '/' => :index
end
end
where :task_key should be recognized as params[:task_key] and the called controller should be the value of params[:task_key]
So if a click a link like http://some.url/a_mandate_key/import it should call the ImportController.
I'm sure that the solution will be simple, but finding is hard!

Answer 1

Sometimes one is looking for a highly complicated solution, but it could be so much easier:
scope :path => '/:mandate_key' do
get '/' => "tasks#index" #mandate_path
get '/import' => "import#index"
get '/clearance' => "clearance#index"
end
Calling http://localhost/mandate the controller 'mandate' is called an params[:mandate_key] provides 'mandate'
Calling http://localhost/mandate/import the controller 'import' is called an params[:controller] provides 'import'
Trying the easy way is often the best way :)
Thanks for your help, Bohdan!

Answer 2

you might add in the bottom of your routes match ':controller(/:action(/:id))' so any unknown url will be dispatched this way
How about
scope :path => '/:mandate_key', :controller => :tasks do
get '/' => :index #mandate_path
end
....
match ':mandate_key/:controller(/:action)'
first scope will match routes /:mandate_key/tasks and the second one /:mandate_key/:controller or /:mandate_key/:controller/:action however second part should be defined in the bottom of your routes.rb file otherwise it'll match wrong routes