added suppliers, weight to item

back-office/app/models/cart.rb

@@ -1,2 +1,6 @@
 class Cart < ActiveRecord::Base
+
+	has_many :item_in_carts
+	belongs_to :user
+
 end

back-office/app/models/item.rb

@@ -2,6 +2,9 @@ class Item < ActiveRecord::Base
   belongs_to :unit
   has_many :multi_media_descriptions
   belongs_to :sub_category
+  belongs_to :supplier
+
+  validates_presence_of :name, :description, :list_price, :current_input_price, :tags, :unit_id, :code, :sub_category_id, :weight, :supplier_id
+
 
-  validates_presence_of :name, :description, :list_price, :current_input_price, :tags, :unit_id, :code, :sub_category_id
 end

back-office/app/models/item_in_cart.rb

@@ -5,4 +5,8 @@ class ItemInCart < ActiveRecord::Base
   validates_uniqueness_of :item_id, scope: :cart_id
   validates :item_id, presence: true
   validates :cart_id, presence: true
+
+  def to_s
+  	item.name + " " + count.to_s + " " + price.to_s
+  end
 end

back-office/app/models/supplier.rb

@@ -0,0 +1,6 @@
+class Supplier < ActiveRecord::Base
+	has_many :items
+
+	validates_uniqueness_of :name
+	validates_presence_of :name
+end

back-office/app/models/user.rb

@@ -0,0 +1,10 @@
+class User < ActiveRecord::Base
+  has_many :carts
+  
+  validates_presence_of :first_name, :last_name, :password, :email, :password_confirmation
+
+  validates :email, :uniqueness => {:case_sensitive => false, :message => "Email already exists!"},
+    format: { with: /\A([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})\z/i, message: "invalid email" }
+
+  validates :password, confirmation: true, length: { in:6..20, too_short: 'password needs to be at least 6 characters long' }
+end