(Symfony3/php7) Cannot use object of type AppBundle\Entity as array

Question

I have an error: "Cannot use object of type AppBundle\Entity as array", and it makes no sense for me, imo it's okay.

if ($form->isSubmitted() && $form->isValid()) {
            $user = $form->getData();
            $repository = $this->getDoctrine()->getRepository(User::class);
            $findUser = $repository->findOneBy(['username' => $form->getData()['username']]);
            if ($findUser) {
                return $this->redirectToRoute('login');
            }

Error Cannot use object of type AppBundle\Entity\User as array is at line with "$findUser ="

Can someone explain my why isn't it working?

Symfony 3.3, PHP 7

by the way, if any answers to your questions ever helped you, it would be useful for others to mark those answers as the right ones. I'm not talking about my answer, I'm talking about all of your questions, that still go "unanswered". — Kevin Kopf
– Kevin Kopf, Commented Dec 27, 2017 at 0:34
@AlexKarshin sorry, I have no idea how to mark a comment as a right answer :p Many of my questions have unhelpful answers, so I am not marking them as right ones. — shaelex
– shaelex, Commented Dec 28, 2017 at 9:26

Kevin Kopf · Accepted Answer · 2017-12-25 22:17:45Z

5

This example here explains everything:

$form->handleRequest($request);

if ($form->isSubmitted() && $form->isValid()) {
    // $form->getData() holds the submitted values
    // but, the original `$task` variable has also been updated
    $task = $form->getData();

    ...
}

Thus, $form->getData() holds the entity. So, if your User entity has a username attribute, you should call it as $form->getData()->getUsername() or whatever getter you have there.

answered Dec 25, 2017 at 22:17

Kevin Kopf

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Asmir Zahirovic · Accepted Answer · 2017-12-26 09:38:48Z

3

Usualy when you get error like this you have to check data type. If variable is array you can access it only as array using $variable['index'];, if it is object you can access it using $variable->index;. Best way to figure out variable type is to use print_r($variable); or var_dump($variable); and it will output variable type for you. In your case you will use print_r($form->getData()); or var_dump($form->getData());. If you use wrong way to get data from variable (array/object) you will receive (Cannot use object of type) error.

If it is array (in your case it isn't):

$form->getData()['username'];

If it is object:

$form->getData()->username;

if your framework has getters and setters:

$form->getData()->getUsername();

edited Dec 26, 2017 at 9:38

answered Dec 25, 2017 at 22:16

Asmir Zahirovic

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1 Comment

MZaragoza Over a year ago

Can you please explain your answer so it’s not a code only answer

Wolen · Accepted Answer · 2017-12-25 23:20:01Z

1

It seems you doesn't see differences between objects and arrays. Let's say you have an object (class) Car and that object has a property e.g. type set to 'Van'. Now you want to get this type. How you do it? Using -> symbol.

$car = new Car();
echo $car->type; //Van

Now we have an array $car with named index type set to Muscle.

$car = ['type' => 'Muscle'];
echo $car['type']; //Muscle

You cannot treat Object as Array and vice versa. You have Entity (which is just a class, object) so you have to treat it like an object.

So if you have Entity User you access its properties using -> not [].

answered Dec 25, 2017 at 23:20

Wolen

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