filter by categories added

app/controllers/hps_learnings_controller.rb

@@ -2,7 +2,7 @@ class HpsLearningsController < ApplicationController
   def index
     table_fields = ["hps_learning.course_pic", "hps_learning.title", :category, "hps_learning.runtime", "hps_learning.lectures"].collect{|x| {"head" => t(x.to_sym)}}
     classes = []
-    HpsClass.all.desc(:created_at).each do |hpsclass|
+    HpsClass.filter_by_categories.desc(:created_at).each do |hpsclass|
       if hpsclass.hps_lectures.count > 0
         thumb = hpsclass.course_pic.thumb.url.nil? ? "http://www.placehold.it/150x150/EFEFEF/AAAAAA" : hpsclass.course_pic.thumb.url
         classes << {

app/views/admin/hps_learnings/index.html.erb

@@ -12,7 +12,7 @@
         <% if !clas.course_pic.url.nil? %>
           <td><img width="150px" src="<%= clas.course_pic.thumb.url %>" /></td>
         <% else %>
-          <td>&nbsp;</td>
+          <td><img src="http://www.placehold.it/150x150/EFEFEF/AAAAAA" width="150px"></td>
         <% end %>
         <td>
           <a href="<%= admin_hps_learning_path(clas.id, :page => params[:page]) %>"> <%= clas.title %> </a>