Question

I try to realize such a effect in a form of creating a new category : I add a ‘select list’ to the form to show all the category i have created ,so I tried:

> /**
>      * @var string $parent
>      *
>      * @ORM\ManyToOne(targetEntity="ProductCategory")
>      * @ORM\JoinColumn(name="product_category_id",
> referencedColumnName="id")  
>      */
>      
>     private $parent;

then i want to realize that:if the checkbox isRoot is selected ,the parent option is set “root”,so i wrote:

> if($entity->getIsRoot()){
>             $entity ->setParent('root');
>         }

However,it give me a exception:
Expected argument of type “object”, “string” given

what’s the matter? How to solve the problem.

Thanks in advance! 🙂

Answer 1

Looks like your problem is that the

->setParent()

expects an object of type Category.

Since you don’t want to select a parent category for root nodes, you should not set the parent.