activerecord - getting the most popular category

Vote count:

0

I have a model Category and class method tickets_num which return the number of tickets that belongs to this category: Category.first.tickets_num # => 2

class Category < ActiveRecord::Base
  has_many :tickets

  def tickets_num
    self.tickets.count
  end
end

I would like to do controller method "popular" which will return me 3 categories with the highest number of tickets_num , how can I do it in the most elegant way?

def popular
  @categories = Category.all.order(tickets_num).limit(3)
end

my method doesn't work.

asked 1 min ago

lipenco

183