Example #1
0
 function getBookId()
 {
     if (is_null($this->bookId) && !is_null($this->parent_id)) {
         $parent = Item::retrieveItem($this->parent_id);
         $bookId = $parent->getTabs()[0]->getFields()[0]->value;
         $this->setBookId($bookId);
     }
     return $this->bookId;
 }