update addorder available and max qty

app/models/menu_category.rb

@@ -9,6 +9,7 @@ class MenuCategory < ApplicationRecord
   validates_presence_of :name, :menu, :order_by
 
   default_scope { order('order_by asc') }
+  scope :active, -> {where("is_available = 1")}
 
   def self.destroyCategory(menu_category)
   	# find the sub menu item of current item