Tabela de notificações

notifications.rb

create_table "notifications", :force => true do |t|
  t.integer  "notified_id",                                              :null => false
  t.string   "notified_type",      :limit => 7,                          :null => false
  t.integer  "notifier_id",                                              :null => false
  t.string   "notifier_type",      :limit => 7,                          :null => false
  t.integer  "target_id",                       :default => 0,           :null => false
  t.string   "target_type",        :limit => 9, :default => "Undefined", :null => false
  t.string   "target_aggregation",              :default => "",          :null => false
  t.string   "action_type",        :limit => 8,                          :null => false
  t.boolean  "read",                            :default => false,       :null => false
  t.datetime "created_at",                                               :null => false
end

add_index "notifications", ["notified_id", "notified_type", "notifier_id", "notifier_type", "target_id", "target_type", "action_type"], :name => "index_notifications", :unique => true
add_index "notifications", ["notified_id", "notified_type"], :name => "index_notifications_on_notified_id_and_notified_type"
add_index "notifications", ["notifier_id", "notifier_type"], :name => "index_notifications_on_notifier_id_and_notifier_type"
add_index "notifications", ["read"], :name => "index_notifications_on_read"