Ojs\JournalBundle\Entity\Journal::addArticle PHP Method

    public function addArticle(Article $article)
    {
        if (!$this->articles->contains($article)) {
            $this->articles->add($article);
            $article->setJournal($this);
        }
        return $this;
    }

 /**
  * Set journal
  * @param  Journal $journal
  * @return $this
  */
 public function setJournal(Journal $journal)
 {
     $this->journal = $journal;
     $journal->addArticle($this);
     return $this;
 }