text: class CreateRealActivityStream < ActiveRecord::Migration
    def change
      drop_table :activities
  
      create_table :activities, id: :uuid do |t|
        t.string    :type
        t.uuid      :actor_id
        t.string    :actor_type
        t.uuid      :subject_id
        t.string    :subject_type
        t.uuid      :target_id
        t.string    :target_type
        t.timestamp :created_at
      end
    end
  end
  