Rails错误resource_name - devise帮助路由和渲染

我正在尝试渲染 Devise gem 的登录视图，但出现错误，下面是我当前拥有的代码：

这是我的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 my 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

在我的应用程序布局中：

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

我收到以下错误_links.html.erb部分的：

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

最后，在我的应用程序控制器中，我有以下内容：

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

任何帮助将不胜感激，谢谢！

resource_name在设计生成的控制器中定义。我认为您不能在应用程序布局中包含这些共享链接，我认为它们旨在用于由设备控制器呈现的设备表单（注册、会话、密码、确认等）。

如果您希望每个页面中都有少量的登录/退出片段，您可能需要考虑自己编写这些链接。例如，如果您正在使用设备的对象是user，你可以这样写：

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

the resource_name只是您正在使用的资源的 Devise 抽象。我希望如果您建立此链接，您知道which您想要登录的经过身份验证的对象的数量，因此您可以明确指定它。你也可以跑rake routes | grep sessions看看路径的名称是什么并直接使用它。例如：

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