gistfile1.rb

class Activity < ActiveRecord::Base
  belongs_to :user
  belongs_to :target, :polymorphic => true
  
  #validates_presence_of :user, :activity_type, :target

  AUDITION_POSTED           = 1 #target --> audition
  AUDITION_FEEDBACK_UPDATED = 2 #target --> audition
  AUDITION_VIEWED           = 3 #target --> video
  NEW_PART                  = 4 #target --> part
  
  class << self
    def add(user, activity_type, target)
      return false if user.blank? or activity_type.blank? or target.blank?
      activity = Activity.new(:user => user, :activity_type => activity_type, :target => target)
      activity.save!
    end
    
    #TODO : maybe do it a a delayed job
    def batch_add(users, activity_type, target)
      return false if users.blank? or activity_type.blank? or target.blank?
      inserts = []
      users.each {|user| inserts.push "('#{user.id}', '#{activity_type}', '#{target.id}', '#{target.class}', NOW())" }

      sql = "INSERT INTO activities (`user_id`, `activity_type`, `target_id`, `target_type`, `created_at`) VALUES #{inserts.join(", ")}"
      ActiveRecord::Base.connection.execute sql
    end
    
  end
  
end