uninitialized constant error in rails 3 on newly created controller

Question

I added a Session controller to my application for user sign-in / sign-out, using

rails g controller Session new create destroy

then add the following lines to my route file:

resources :sessions, :only => [:new, :create, :destroy]
match '/signup', :to => 'users#new'
match '/signin', :to => 'sessions#new'
match '/signout', :to => 'sessions#destroy'

when I do rake routes in the console, the routes do show up, but when I launch the app in the browser, I got this error:

uninitialized constant SessionsController

Thanks in advance!

Answer 1

You created a Session controller, not a Sessions controller. Since it's singular, you want a singular route:

resource :session, :only => [:new, :create, :destroy]

Answer 2

I was running into this today, and found I had to do three things, 1) use resource (not resources); 2) supply the controller manually, and 3) manually set the url in form_for tags using the resource (may not apply for your case)...

# routes.rb
resource :session, :only => [:new, :create, :destroy], :controller => 'session'

#.../new.html.erb
<% form_for @session, :url => session_path do |f| %>

Specifying the controller matters if, like me, your controller name, file names, etc, are all singular.

This is apparently related to a bug in rails