$tag = $this->get('wallabag_core.tag_repository')->findOneBySlug($request->query->get('tag'));
$entries = $repository->findAllByTagId(
$this->getUser()->getId(),
$tag->getId()
);
$tag = $this->get('wallabag_core.tag_repository')->findOneBySlug($request->query->get('tag'));
$entries = $repository->findAllByTagId(
$this->getUser()->getId(),
$tag->getId()
);