遇到突出显示当前链接呈现的问题

Question

以下this snippet，我已经在我的rails应用程序中进行了设置，以突出显示当前正在呈现的链接。

<div class="env-alt rtl"> 
    <%= section_link("Home", :controller => 'welcome') %> | 
    <% if user_signed_in? %> 
     <%= section_link("Map", :controller => 'pois') %> | 
     <%= section_link("News", :controller => 'news', :ref => 'home') %> | 
     <%= section_link("Documents", :controller => 'documents', :ref => 'home') %> | 
     <%= section_link("Organisations", :controller => 'organisations', :ref => 'home') %> | 
     <%= section_link("Dashboard", :controller => 'welcome', :action => 'dashboard') %> | 
    <%#= link_to "Sign out", destroy_user_session_path, :id => 'sign_out' %> 
    <% else %> 
    <%= link_to "Sign up", new_user_registration_path, :id => 'sign_up' %> | 
    <%= link_to "Sign in", new_user_session_path, :id => 'sign_in' %> 
    <% end %> 
</div> 

在application_controller.rb我有以下几点：

def instantiate_controller_and_action_names 
    @current_action   = action_name 
    @current_controller = controller_name 
end 

在application_helper.rb：

def section_link(name, options) 
    action  = options[:action] || 'index' 
    controller = options[:controller] 

    if action.eql?(@current_action) and controller.eql?(@current_controller) 
     link_to(name, options, :class => 'youarehere') 
    else 
    link_to(name, options) 
    end 
end 

我觉得，我把一切都设置正确。但是，在我抛出这个奇怪的错误：

Showing /home/syed/work/projects/mapunity/environment/app/views/shared/links/_user.erb where line #2 raised: 

No route matches {:controller=>"devise/welcome"} 

Extracted source (around line #2): 

1: <div class="env-alt rtl"> 
2: <%= section_link("Home", :controller => 'welcome') %> | 
3: <% if user_signed_in? %> 
4: <%= section_link("Map", :controller => 'pois') %> | 
5: <%= section_link("News", :controller => 'news', :ref => 'home') %> | 

为什么会自动添加:controller => "devise/welcome"？任何指向我出错的指针将不胜感激。提前致谢。

Answer 1

回答我的问题，可能会有所帮助别人，必须更新我的section_link_to助手这样的：

定义的CSS类.current突显当前的链接。我的定义是这样的：

.current { 
    font-size: 12pt; 
    text-decoration: none; 
} 

在application_controller.rb，定义哪些将设置电流控制器和动作名称的的before_filter。

def instantiate_controller_and_action_names 
    @current_action = action_name 
    @current_controller = controller_name 
end 

然后助手：

def section_link_to(name, url_options, html_options = {}) 
    if url_options.is_a?(Hash) 
    action = url_options[:action] || 'index'   
    controller = url_options[:controller] 

    if action.eql?(@current_action) and controller.eql?(@current_controller) 
     link_to(name, url_options, html_options, :class => 'current') 
    else 
     link_to(name, url_options, html_options) 
    end 
    else 
    if url_options.length > 1 
     controller = url_options.delete('/') 
     if controller.include?('?') 
     controller = controller.split('?')[0] 
     end 
    else 
     controller = 'welcome' 
    end 

    if controller == @current_controller 
     if html_options.has_key?(:class) 
     css_options = html_options.fetch(:class) 
     css_options << ' current' 

     html_options.merge!({ :class => css_options }) 
     else 
     html_options.merge!({ :class => 'current' }) 
     end 

     link_to(name, url_options, html_options) 
    else 
     link_to(name, url_options, html_options) 
    end 
    end 
end 

在帮手，我检查current_controller和current_action是否等于所呈现的链接。如果是，请将类.current添加到该链接并进行渲染。

现在我可以通过或者是像哈希选项：

<%= section_link_to "Home", :controller => 'welcome %> 

或者使用产生的轨道是这样的：

<%= section_link_to "Home", root_path %>