/**
* Get average rates of an article, returns null if no rate
*
* @param Article $article
* @return float|null
*/
public function getRatesAverage(Article $article)
{
$sum = 0;
$nbRates = $article->getRates()->count();
/** @var Rate $rate */
foreach ($article->getRates() as $rate) {
$sum += $rate->getValue();
}
return $nbRates > 0 ? $sum / $nbRates : null;
}
