Refactoring Conference/Event media to new media object

close #420

db/migrate/20140801170430_move_event_media_to_commercial.rb

@@ -0,0 +1,28 @@
+class MoveEventMediaToCommercial < ActiveRecord::Migration
+  class TempEvent < ActiveRecord::Base
+    self.table_name = 'events'
+  end
+
+  class TempCommercial < ActiveRecord::Base
+    self.table_name = 'commercials'
+    attr_accessible :commercial_id, :commercial_type, :commercialable_id, :commercialable_type
+  end
+
+  def change
+    # Move all the settings to the new object
+    TempEvent.all.each do |event|
+      unless TempCommercial.exists?(commercialable_id: event.id, commercialable_id: 'Conference')
+        unless event.media_id.blank? || event.media_type.blank?
+          TempCommercial.create(commercial_id: event.media_id,
+                                commercial_type: event.media_type,
+                                commercialable_id: event.id,
+                                commercialable_type: 'Event')
+        end
+      end
+    end
+
+    # Then remove all the columns
+    remove_column :events, :media_id
+    remove_column :events, :media_type
+  end
+end