 
  
   
  
   
  
   
  
  class Category < ApplicationRecord
	has_many :subcategories
	has_many :items
end
class Subcategory < ApplicationRecord
	belongs_to :category
	has_many :items
end
class Item < ApplicationRecord
	belongs_to :user
  belongs_to :category
  belongs_to :subcategory
end
class User < ApplicationRecord
	has_many :item
end