$this->encodePrimaryKey($backup->id), 'activity_id' => $this->encodePrimaryKey($backup->activity_id), 'json_backup' => (string) $backup->json_backup ?: '', 'html_backup' => (string) $backup->html_backup ?: '', 'amount' => (float) $backup->amount, 'created_at' => (int)$backup->created_at, 'updated_at' => (int)$backup->updated_at, ]; } public function includeActivity(Backup $backup) { $transformer = new ActivityTransformer($this->serializer); return $this->includeItem($backup->activity, $transformer, Activity::class); } }