change UI for all settings module

app/models/menu_category.rb

@@ -6,7 +6,8 @@ class MenuCategory < ApplicationRecord
   belongs_to :parent, :class_name => "MenuCategory", foreign_key: "menu_category_id", optional: true
   has_many :menu_items
 
-  validates_presence_of :name, :menu, :order_by
+  validates_presence_of :code, :name, :menu, :order_by
+  validates_uniqueness_of :code
 
   default_scope { order('order_by asc') }
   scope :active, -> {where("is_available = 1")}

app/models/menu_item.rb

@@ -13,8 +13,9 @@ class MenuItem < ApplicationRecord
   has_many :menu_item_sets
   has_many :item_sets, through: :menu_item_sets
 
-  validates_presence_of :name, :type, :min_qty, :taxable,:account_id
-
+  validates_presence_of :item_code, :name, :type, :min_qty, :taxable,:account_id
+  validates_uniqueness_of :item_code
+  
   default_scope { order('item_code asc') }
 
   scope :simple_menu_item, -> { where(type: 'SimpleMenuItem') }

app/models/menu_item_instance.rb

@@ -4,6 +4,8 @@ class MenuItemInstance < ApplicationRecord
   has_many :menu_instance_item_sets
   has_many :item_sets, through: :menu_instance_item_sets
   # before_create :generate_menu_item_instance_code
+  validates_presence_of :item_instance_code
+  # validates_uniqueness_of :item_instance_code
 
   def self.findParentCategory(item)
     if item.menu_category_id