Método que exporta arquivo CSV no FuelPHP

ExportCSVFuelPHP.php

<?php
class Controller_Newsletters extends Controller{
	public function action_export_csv()
	{
		$newsletters = Model_Newsletter::find('all');

		$listNewsletters = array();

		foreach ($newsletters as $newsletter) {
			array_push($listNewsletters, array(
				'name' 	=> $newsletter->name,
				'email'	=> $newsletter->email
			)); 
		}

		$csvContent = Format::forge($listNewsletters)->to_csv(null,null, false, array('nome', 'email'));

		if(File::exists(DOCROOT.'/files/csv/NewsletterMembers.csv')){
			File::delete(DOCROOT.'/files/csv/NewsletterMembers.csv');
		}

		File::create(DOCROOT.'files/csv', 'NewsletterMembers.csv', $csvContent);

		File::download(DOCROOT.'files/csv/NewsletterMembers.csv');

		exit();
	}
}