Rails error resource_name - routing and rendering development

Question

I try to display the login window for Devise gem, but I get an error: below is the code that I have:

This is mine views/users/shared/_links.html.erb:

<%- if controller_name != 'sessions' %>
  <%= link_to "Sign in", new_session_path(resource_name) %><br />
<% end -%>

<%- if devise_mapping.registerable? && controller_name != 'registrations' %>
  <%= link_to "Sign up", new_registration_path(resource_name) %><br />
<% end -%>

<%- if devise_mapping.recoverable? && controller_name != 'passwords' %>
  <%= link_to "Forgot your password?", new_password_path(resource_name) %><br />
<% end -%>

<%- if devise_mapping.confirmable? && controller_name != 'confirmations' %>
  <%= link_to "Didn't receive confirmation instructions?", new_confirmation_path(resource_name) %><br />
<% end -%>

<%- if devise_mapping.lockable? && resource_class.unlock_strategy_enabled?(:email) && controller_name != 'unlocks' %>
  <%= link_to "Didn't receive unlock instructions?", new_unlock_path(resource_name) %><br />
<% end -%>

<%- if devise_mapping.omniauthable? %>
  <%- resource_class.omniauth_providers.each do |provider| %>
    <%= link_to "Sign in with #{provider.to_s.titleize}", omniauth_authorize_path(resource_name, provider) %><br />
  <% end -%>
<% end -%>

And mine config/routes.rb:

Densidste::Application.routes.draw do
  match 'user/edit' => 'users#edit', :as => :edit_current_user

  match 'signup' => 'devise/users#new', :as => :signup

  match 'logout' => 'devise/sessions#destroy', :as => :logout

  devise_for :users do
    get "login", :to => "devise/sessions#new"
  end

  resources :sessions

  resources :users

  devise_for :users

  resources :aktivs

  resources :taggingposts

  resources :tags

  resources :kommentares

  resources :posts

  # You can have the root of your site routed with "root"
  # just remember to delete public/index.html.
  root :to => "public#index"
end

And in my application layout:

<%= render("users/shared/links") %>

I get the following error in part _links.html.erb:

NameError in Public#index

Showing C:/Rails/Densidste/app/views/users/shared/_links.erb where line #2 raised:

undefined local variable or method `resource_name' for #<#<Class:0x5db76c0>:0x5db6538>

Extracted source (around line #2):

1: <%- if controller_name != 'sessions' %>
2:   <%= link_to "Sign in", new_session_path(resource_name) %><br />
3: <% end -%>
4: 
5: <%- if devise_mapping.registerable? && controller_name != 'registrations' %>

Trace of template inclusion: app/views/public/index.html.erb

Rails.root: C:/Rails/Densidste

Finally, in my application controller, I have the following:

before_filter :resource_name
  def resource_name
    if user_signed_in?
      current_user.name
    else
      :user
    end
  end
end

Any help would be greatly appreciated, thanks!

Answer 1

resource_name , Devise. , , , (, , , ..), .

/ , . , , devise for, user, :

<%= link_to "Sign in", new_session_path(:user) %><br />

resource_name - Devise , . , , , , . rake routes | grep sessions , . :

<%= link_to "Sign in", new_user_session_path %><br />

Answer 2

, routes.rb sessions, .

, resources :sessions .

, . , new_session_path (format). devise new_session_path(resource_name). dev new_<resouce_name>_session_path. , , , , .

, , - :

devise_scope :user do 
  get 'login', :to => 'devise/sessions#new', :as => :new_session
  get 'logout', :to => 'devise/sessions#destroy', :as => :destroy_session
end

new_session destroy_session login logout .