# comments migration
class CreateComments < ActiveRecord::Migration
  def change
    create_table :comments do |t|
      t.text    :text
      t.integer :user_id
      t.integer :commentable_id
      t.string  :commentable_type

      t.timestamps
    end

    add_index :comments, [:commentable_type, :commentable_id]
  end
end

# comment model

module ActivityFusion
  class Comment < ActiveRecord::Base
    belongs_to :commentable, polymorphic: true
  end
end