Rails Url Generation Error -

i have 2 models section , newsitem

section.rb

class section < activerecord::base    has_many :newsitems end 

newsitem.rb

class newsitem < activerecord::base   belongs_to :section end 

in section controller have this:

class sectionscontroller < inheritedresources::base    defaults collection_name: 'sections', instance_name: 'section'     def newsitems       @newsitem = @section.newsitems    end end 

in routes.rb

resources :sections    resources :newsitems 

in view i'm this:

<% @newsitem.order('created_at desc').each |newsitem|  %>     <div class="newsitem-block">         <%= newsitem.created_at.strftime("%d.%m.%y") %>         <h1><%= link_to newsitem.title, newsitem %></h1>     </div> <% end %> 

but rails show me error

no route matches {:type=>nil, :action=>"show", :controller=>"newsitems", :id=>nil, :format=>nil} missing required keys: [:id, :id] 

rake routes:

                       newsitems      /offices(/:type)/:id/newsitems(.:format)                          newsitems#index {:type=>nil}                                  post     /offices(/:type)/:id/newsitems(.:format)                          newsitems#create {:type=>nil}                     new_newsitem      /offices(/:type)/:id/newsitems/new(.:format)                      newsitems#new {:type=>nil}                    edit_newsitem      /offices(/:type)/:id/newsitems/:id/edit(.:format)                 newsitems#edit {:type=>nil}                         newsitem      /offices(/:type)/:id/newsitems/:id(.:format)                      newsitems#show {:type=>nil}                                  patch    /offices(/:type)/:id/newsitems/:id(.:format)                      newsitems#update {:type=>nil}                                  put      /offices(/:type)/:id/newsitems/:id(.:format)                      newsitems#update {:type=>nil}                                  delete   /offices(/:type)/:id/newsitems/:id(.:format)                      newsitems#destroy {:type=>nil} 

what's wrong?

try:

<h1><%= link_to newsitem.title, [newsitem] %></h1> 

or

<h1><%= link_to newsitem.title, newsitem_path(newsitem) %></h1>