如何使Rails中的链接散列？

def project_topic_ajax(id, topic)
   \"http://www.site.com/#/project/#{id}/#{topic.name}/#{topic.id}\"
end

<%= link_to \"View on Site\", \"##{project_topic_url(@project.id, @topic)}\" %>

<%= link_to \"View on Site\", \"http://www.site.com/##{project_topic_url(@project.id, @topic)}\" %>

<%= link_to \'View on Site \', [project_topic_url(@project.id, @topic).gsub(/#{project_topic_path(@project.id, @topic)}/, \"\"), project_topic_path(@project.id, @topic)].joins(\"#\") %>

MyRails::Application.routes.draw do
  scope :hash, :path => \"/#\" do
    resources :project do
      resources :topic
      # ...
    end
    # ...
  end
end

rake routes