01 - user-constand-and-virtual-fields.rb

class User < ActiveRecord::Base
  Statuses = {inactive: 0, active: 1, suspended: 2, deleted: 3}
  
  def self.statuses_for_select
    {
      "Active" => Statuses[:active],
      "Inactive" => Statuses[:inactive],
      "suspended" => Statuses[:suspended],
      "Deleted" => Statuses[:deleted]
    }
  end

  def status_name
      return "Active" if self.is_active?
      return "Inactive" if self.is_inactive?
      return "Deleted" if self.is_deleted?
      return "Suspended" if self.is_suspended?
      return "NA" # Didnt you put a default value for this column?
  end

  def is_active?
      self.status == Statuses[:active]
  end

  def is_inactive?
      self.status == Statuses[:inactive]
  end

  def is_deleted?
      self.status == Statuses[:deleted]
  end

  def is_suspended?
      self.status == Statuses[:suspended]
  end
  
end