created item groups and link banners and their associations and fixed bugs with join tables

back-office/app/controllers/item_groups_controller.rb

@@ -0,0 +1,4 @@
+class ItemGroupsController < ApplicationController
+  active_scaffold :"item_group" do |conf|
+  end
+end

back-office/app/controllers/link_banners_controller.rb

@@ -0,0 +1,4 @@
+class LinkBannersController < ApplicationController
+  active_scaffold :"link_banner" do |conf|
+  end
+end

back-office/app/controllers/special_offers_controller.rb

@@ -1,4 +0,0 @@
-class SpecialOffersController < ApplicationController
-  active_scaffold :"special_offer" do |conf|
-  end
-end

back-office/app/helpers/item_groups_helper.rb

@@ -0,0 +1,2 @@
+module ItemGroupsHelper
+end

back-office/app/helpers/link_banners_helper.rb

@@ -0,0 +1,2 @@
+module LinkBannersHelper
+end

back-office/app/helpers/special_offers_helper.rb

@@ -1,2 +0,0 @@
-module SpecialOffersHelper
-end

back-office/app/models/item.rb

@@ -3,7 +3,7 @@ class Item < ActiveRecord::Base
   has_many :multi_media_descriptions
   belongs_to :sub_category
   belongs_to :supplier
-  belongs_to :special_offer
+  has_and_belongs_to_many :item_groups, :join_table => 'item_item_groups'
 
   validates_presence_of :name, :description, :list_price, :current_input_price, :tags, :unit_id, :code, :sub_category_id, :weight, :supplier_id
 

back-office/app/models/item_group.rb

@@ -0,0 +1,4 @@
+class ItemGroup < ActiveRecord::Base
+	has_and_belongs_to_many :items, :join_table => 'item_item_groups'
+
+end

back-office/app/models/link_banner.rb

@@ -1,5 +1,5 @@
-class SpecialOffer < ActiveRecord::Base
-	belongs_to :item
+class LinkBanner < ActiveRecord::Base
+	
 	belongs_to :category
 	belongs_to :section
 	belongs_to :sub_category