Question

在this snippet之后，我在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中我有以下内容：

def instantiate_controller_and_action_names
    @current_action         = action_name
    @current_controller = controller_name
end

在application_helper.rb中：

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

我想，我已经正确设置了所有设置。但是，它给我带来了这个奇怪的错误：

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"？任何指向我出错的地方都会受到赞赏。提前谢谢。

Answer 1

回答我自己的问题，可能对其他人有帮助，必须像这样更新我的section_link_to帮助：

定义了一个css类.current以突出显示当前链接。我的定义如下：

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

在application_controller.rb中，定义一个before_filter，用于设置当前控制器和动作名称。

def instantiate_controller_and_action_names
  @current_action = action_name
  @current_controller = controller_name
end

然后帮助者：

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

在帮助程序中，我正在检查current_controller和current_action是否等于正在呈现的链接。如果是，请将类.current添加到该链接并进行渲染。

现在我可以传递以下选项的哈希：

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

或者像这样使用生成的rails：

<%= section_link_to "Home", root_path %>

实现突出显示的当前链接遇到问题

1 个答案: