phone_app/app/models/p_grade.rb

class PGrade < ApplicationRecord
  has_many :p_articles

  acts_as_sorting :fields => {
    :id => {:name => "id", :reorder => true},
    :grade => {:name => "Grade", :reorder => true},
    :actions => {:name => "Actions", :reorder => false},
  }

  ACTIVATED = true
end