Rails link_to to generate URL with subdirectory

Question

In my routes file I have the line:

match 'documents/:category/:id' => 'documents#show'

allowing me to use URLs like:

*localhost:3000/documents/lesson_plans/day_01*

The URL works correctly, but I can't figure out how to generate it using link_to.

---

link_to 'day_01', document_path('/lesson_plans/day_01')

returns the error:

No route matches {:action=>"show", :controller=>"documents", :id=>"/lesson_plans/day_01"}

---

link_to 'day_01', document_path(:category => 'lesson_plans', :id => 'day_01')

works, but it generates the URL:

localhost:3000/documents/day_01?category=lesson_plans

which isn't clean enough.

---

Is there a way to generate the URL:

localhost:3000/documents/lesson_plans/day_01

Answer 1

<%= link_to "day_01", {:controller => :documents, :action => :show, :category => "lesson_plans", :id => "day_01"} %>

Answer 2

Give this a try:

match 'documents/:category/:id' => 'documents#show', :as => :document

and

= link_to 'day_01', document_path('day_01', :category => 'lesson_plans')

It should generate:

http://localhost:3000/documents/lesson_plans/day_01