private static function insert(Article $model)
{
$db = Database::getInstance('app');
$query = "INSERT INTO articles (title,content,post_date,articleImage,titleBG,contentBG) VALUES (:title, :content, :post_date, :articleImage, :titleBG, :contentBG);";
$result = $db->prepare($query);
$result->execute([':title' => $model->getTitle(), ':content' => $model->getContent(), ':post_date' => $model->getPost_date(), ':articleImage' => $model->getArticleImage(), ':titleBG' => $model->getTitleBG(), ':contentBG' => $model->getContentBG()]);
$model->setId($db->lastId());
}