diff --git a/Gemfile b/Gemfile
index b4af2e714..603a3dbeb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,6 +23,7 @@ gem "russian"
 gem "grit"
 gem 'whenever', :require => false
 gem 'delayed_job'
+gem 'whenever', :require => false
 gem 'unicorn'
 
 group :production do
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 22378cc2d..5af2cd547 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -2,10 +2,10 @@
 class ApplicationController < ActionController::Base
   protect_from_forgery
   layout :layout_by_resource
+
   private
     def get_role(object_id, object_type, target_id, target_type)
-      rel=Relation.where(:object_id=>object_id, :object_type=>object_type, :target_id=>target_id, :target_type=>target_type).first
-      return (rel) ? rel.roles : nil
+      Relation.where(:object_id=>object_id, :object_type=>object_type, :target_id=>target_id, :target_type=>target_type).first.try(:roles)
     end
     
     def checkaccess
diff --git a/app/controllers/platforms_controller.rb b/app/controllers/platforms_controller.rb
index 9494dd461..b94ba4b5c 100644
--- a/app/controllers/platforms_controller.rb
+++ b/app/controllers/platforms_controller.rb
@@ -7,7 +7,20 @@ class PlatformsController < ApplicationController
   before_filter :get_paths, :only => [:new, :create]
 
   def index
-    @platforms = Platform.paginate(:page => params[:platform_page])
+    respond_to do |format|
+      format.html { @platforms = Platform.paginate(:page => params[:platform_page]) }
+      format.json do
+        @platforms = Platform.where(:distrib_type => 'mandriva', :visibility => 'open', :platform_type => 'main')
+        render :json => {
+          :platforms => @platforms.map do |p|
+                          {:name => p.name,
+                           :architectures => ['i586', 'x86_64'],
+                           :repositories => p.repositories.map(&:name),
+                           :url => "http://abs.rosalab.ru/downloads/platforms/#{p.name}/repository"}
+                        end
+        }
+      end
+    end
   end
 
   def show