projekteuler/app/models/problem.rb

class Problem < ActiveRecord::Base
  # TODO Check whether there is a better relation for this
  belongs_to :translation
  delegate :title, :content, to: :translation

  has_many :translations, inverse_of: :problem
  
  self.per_page = 50

  def is_translated?
    !!self.translation
  end


  def original_url
    "https://projecteuler.net/problem=#{self.id}"
  end

  def self.update_count(new_count)
    old_count = Problem.count
    raise ArgumentError, "new count has to be larger than old count" if new_count < old_count

    new_count.times do |i|
      Problem.where(id: i + 1).first_or_create!
    end
  end
end