Added related contents to budget investments

app/controllers/budgets/investments_controller.rb

@@ -41,6 +41,7 @@ module Budgets
     def show
       @commentable = @investment
       @comment_tree = CommentTree.new(@commentable, params[:page], @current_order)
+      @related_contents = Kaminari.paginate_array(@investment.relationed_contents).page(params[:page]).per(5)
       set_comment_flags(@comment_tree.comments)
       load_investment_votes(@investment)
       @investment_ids = [@investment.id]

app/views/budgets/investments/_investment_show.html.erb

@@ -76,6 +76,7 @@
         <p><%= investment.price_explanation %></p>
       <% end %>
 
+      <%= render 'relationable/related_content', relationable: @investment %>
     </div>
 
     <aside class="small-12 medium-3 column">