ruby on rails - No route matches {:action=>"show", :controller=>"forum"} missing required keys: [:id] -

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i'm trying route thredded /forum link on nav bar bug holding me back. not sure if installation issue or pathing one. thanks!

routes.rb

rails.application.routes.draw   resources :links   mount thredded::engine => '/forum' # creates about_path   resources :forum   devise_for :users   root "pages#home"   "about" => "pages#about" end

home page / _header.html.erb

<nav class="navbar navbar-static-top navbar-default" role="navigation">   <div class="container">     <!-- brand , toggle grouped better mobile display -->     <div class="navbar-header">       <button type="button" class="navbar-toggle collapsed" data-toggle="collapse" data-target="#bs-example-navbar-collapse-1" aria-expanded="false">         <span class="sr-only">toggle navigation</span>         <span class="icon-bar"></span>         <span class="icon-bar"></span>         <span class="icon-bar"></span>       </button>       <%= link_to "rowlund", root_path, class: "navbar-brand" %>       <nav class="navbar navbar-default navbar-fixed-bottom">         <div class="container">         </div>       </nav>     </div>      <!-- collect nav links, forms, , other content toggling -->            </li>         </ul>         <ul class="nav navbar-nav navbar-right">           <li><%= link_to "home", root_path %></li>           <li><%= link_to "forum", forum_path%></li>           <li><%= link_to "about", about_path %></li>           <% if user_signed_in? %>             <li><%= link_to "account settings", edit_user_registration_path %> </li>             <li><%= link_to "log out", destroy_user_session_path, method:     :delete %></li>           <% else %>             <li><%= link_to "log in", new_user_session_path %></li>           <% end %>         </ul>        </li>       </ul>     </div><!-- /.navbar-collapse -->   </div><!-- /.container --> </nav>

if run rake routes or rake routes | grep forum, should find following route in list of routes.

forum    /forums/:id(.:format)          forums#show

the route /forums/:id maps forums#show , need pass in id in url. eg:

forums_path(3) => /forums/3 forums_path(forum.find(1)) => /forums/1

in code, you're not passing id forum_path.that why you're getting error missing required keys: [:id]

since don't have particular forum object map in navbar links, should better map link index action. change following link

<li><%= link_to "forum", forum_path %></li>

to 

<li><%= link_to "forum", forums_path %></li>

note forums_path maps forums#index


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