VietTH: Update convention

app/decorators/category_decorator.rb

@@ -2,6 +2,6 @@ class CategoryDecorator < Draper::Decorator
   delegate_all
 
   def title
-    object.title || 'Uncategory'
+    return object.title || 'Uncategory'
   end
 end
\ No newline at end of file

app/decorators/product_decorator.rb

@@ -2,6 +2,6 @@ class ProductDecorator < Draper::Decorator
   delegate_all
 
   def price
-    object.price || 'Contact'
+    return object.price || 'Contact'
   end
 end
\ No newline at end of file

app/models/category.rb

 class Category < ActiveRecord::Base
   default_scope ->{ order(:title) }
 
+  JSON_DEFAULT = %i(id title)
+
   has_many :products, dependent: :destroy
 
   enum category_type: %i(system amazon)
 
-  JSON_DEFAULT = %i(id title)
 end
\ No newline at end of file