ruby-on-rails - Rails error resource_name - 设计帮助路由和渲染

Question

我正在尝试呈现 Devise gem 的登录 View ，但出现错误，下面是我目前拥有的代码:

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 -%>

还有我的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") %>

我在 _links.html.erb 部分得到以下错误:

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 Controller 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

非常感谢任何帮助，谢谢!

Answer 1

resource_name 在 Devise 生成的 Controller 中定义。我不认为您可以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计 Controller 呈现的设计表单(注册、 session 、密码、确认等)。

如果您希望在每个页面中都有很少的登录/退出片段，您可能需要考虑自己编写这些链接。例如，如果你使用 devise 的对象是 user，你可以这样写:

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

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，您会知道您想要登录的已验证对象，因此您可以明确指定它。你也可以运行 rake routes | grep sessions 并查看路径的名称并直接使用它。例如:

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