Added count to each model as badge

Author: Nikolay Moskvin

app/helpers/rails_admin/application_helper.rb

@@ -96,8 +96,10 @@ def navigation(nodes_stack, nodes, level = 0)
         url         = url_for(action: :index, controller: 'rails_admin/main', model_name: model_param)
         level_class = " nav-level-#{level}" if level > 0
         nav_icon = node.navigation_icon ? %(<i class="#{node.navigation_icon}"></i>).html_safe : ''
+        count = node.abstract_model.count
+        badge = %( <span class='badge'>#{count}</span>).html_safe
         li = content_tag :li, 'data-model' => model_param do
-          link_to nav_icon + capitalize_first_letter(node.label_plural), url, class: "pjax#{level_class}"
+          link_to badge + nav_icon + capitalize_first_letter(node.label_plural), url, class: "pjax#{level_class}"
         end
         li + navigation(nodes_stack, nodes_stack.select { |n| n.parent.to_s == node.abstract_model.model_name }, level + 1)
       end.join.html_safe

app/views/layouts/rails_admin/application.html.haml

@@ -18,7 +18,7 @@
         .col-sm-3.col-md-2.reset-left
           .sidebar-nav
             %ul.nav.nav-pills.nav-stacked= main_navigation
-            -# %ul.nav.nav-list= static_navigation
+            %ul.nav.nav-pills.nav-stacked= static_navigation
         .col-sm-9.col-sm-offset-3.col-md-10.col-md-offset-2
           .row
             .content{:'data-pjax-container' => true}= render template: 'layouts/rails_admin/pjax'