Question

I’m working through Ryan Bates’ Railscast #124: Beta Invitations. I’ve got all the code in place, but I haven’t been able to actually get things working. When I try to send an invite email, I get this message.

    Routing Error       
    No route matches [POST] "/invitations"

If I pluralize the resource’s name in Routes.rb, I get a different routing error.

    Routing Error
    uninitialized constant InvitationsController

What am I doing wrong?

Here’s my Routes.rb file.

  resources :users, :invitation
  resources :sessions, :only => [:new, :create, :destroy]

  match '/hunts', :to => 'hunts#index'

  match '/signup/',  :to => 'users#new'
  match '/signin',  :to => 'sessions#new'
  match '/signout', :to => 'sessions#destroy'
  match '/contact', :to => 'pages#contact'
  match '/about',   :to => 'pages#about' 
  match '/help',    :to => 'pages#help'

  root :to => "pages#home"
  match ':controller(/:action(/:id(.:format)))'
end

And my Invitation Controller.

class InvitationController < ApplicationController

  def new
    @invitation = Invitation.new
  end

  def create
    @invitation = Invitation.new(params[:invitation])
    @invitation.sender = current_user
    if @invitation.save
      if logged_in?
        Mailer.deliver_invitation(@invitation, signup_url(@invitation.token))
        flash[:notice] = "Thank you, invitation sent."
        redirect_to root_path
      else
        flash[:notice] = "Thank you, we will notify when we are ready."
        redirect_to root_path
      end
    else
      render :action => 'new'
    end
  end

end

Update: Here’s the info requested.
Views/invitation/html.erb

    <%= form_for @invitation do |f| %>
      <p>
        <%= f.label :recipient_email, "Friend's email address" %><br />
        <%= f.text_field :recipient_email %>
      </p>
      <p><%= f.submit "Invite!" %></p>
    <% end %>

Answer 1

rake routes is a very useful tool which you can use to see all the routes defined for your application.

You have added resources :invitation which defines the following routes

invitation_index GET    /invitation(.:format)          invitation#index
                 POST   /invitation(.:format)          invitation#create
  new_invitation GET    /invitation/new(.:format)      invitation#new
 edit_invitation GET    /invitation/:id/edit(.:format) invitation#edit
      invitation GET    /invitation/:id(.:format)      invitation#show
                 PUT    /invitation/:id(.:format)      invitation#update
                 DELETE /invitation/:id(.:format)      invitation#destroy

Note that you are calling the InvitationController‘s actions.

So nothing is wrong with your route -> controller mapping.

You are just posting to a non-existent route. When you pluralize the route’s name, you end up having a non-existent controller (InvitationsController).

Just change the URL you’re posting to and you’re good to go.