private function populate()
 {
     $sport = new Article();
     $sport->setTitle('Sport');
     $sport->setCode('test');
     $this->dm->persist($sport);
     $cars = new Article();
     $cars->setTitle('Cars');
     $cars->setCode('code');
     $this->dm->persist($cars);
     $thomas = new RelativeSlug();
     $thomas->setTitle('Thomas');
     $thomas->setArticle($sport);
     $this->dm->persist($thomas);
     $jen = new RelativeSlug();
     $jen->setTitle('Jen');
     $jen->setArticle($sport);
     $this->dm->persist($jen);
     $john = new RelativeSlug();
     $john->setTitle('John');
     $john->setArticle($cars);
     $this->dm->persist($john);
     $single = new RelativeSlug();
     $single->setTitle('Single');
     $this->dm->persist($single);
     $this->dm->flush();
 }
 private function populate()
 {
     $art0 = new Article();
     $art0->setTitle('My Title');
     $art0->setCode('The Code');
     $this->dm->persist($art0);
     $this->dm->flush();
     $this->dm->clear();
 }