The method "isInternational" in class "App\Entity\Conference" requires 0 arguments, but should accept only 1..

[VitaliyMarkelov]

Having followed the instructions up to https://symfony.com/doc/6.4/the-fast-track/en/9-backend.html
You can now add/modify/delete conferences directly from the admin backend. Play with it and add at least one conference.
I have encountered a problem. In the attempt to save first conference I got an error, stack trace is below. The method concerned is this:

    public function isInternational(): ?bool
    {
        return $this->isInternational;
    }

any advice is appreciated.

Symfony\Component\PropertyAccess\Exception\NoSuchPropertyException:
The method "isInternational" in class "App\Entity\Conference" requires 0 arguments, but should accept only 1..

at C:\PROJECTS\guestbook\vendor\symfony\property-access\PropertyAccessor.php:539
at Symfony\Component\PropertyAccess\PropertyAccessor->writeProperty(array(object(Conference)), 'isInternational', false)
(C:\PROJECTS\guestbook\vendor\symfony\property-access\PropertyAccessor.php:120)
at Symfony\Component\PropertyAccess\PropertyAccessor->setValue(object(Conference), object(PropertyPath), false)
(C:\PROJECTS\guestbook\vendor\symfony\form\Extension\Core\DataAccessor\PropertyPathAccessor.php:75)
at Symfony\Component\Form\Extension\Core\DataAccessor\PropertyPathAccessor->setValue(object(Conference), false, object(Form))
(C:\PROJECTS\guestbook\vendor\symfony\form\Extension\Core\DataAccessor\ChainAccessor.php:48)
at Symfony\Component\Form\Extension\Core\DataAccessor\ChainAccessor->setValue(object(Conference), false, object(Form))
(C:\PROJECTS\guestbook\vendor\symfony\form\Extension\Core\DataMapper\DataMapper.php:73)
at Symfony\Component\Form\Extension\Core\DataMapper\DataMapper->mapFormsToData(object(RecursiveIteratorIterator), object(Conference))
(C:\PROJECTS\guestbook\vendor\symfony\form\Form.php:551)
at Symfony\Component\Form\Form->submit(array(), true)
(C:\PROJECTS\guestbook\vendor\symfony\form\Extension\HttpFoundation\HttpFoundationRequestHandler.php:110)
at Symfony\Component\Form\Extension\HttpFoundation\HttpFoundationRequestHandler->handleRequest(object(Form), object(Request))
(C:\PROJECTS\guestbook\vendor\symfony\form\Form.php:420)
at Symfony\Component\Form\Form->handleRequest(object(Request))
(C:\PROJECTS\guestbook\vendor\easycorp\easyadmin-bundle\src\Controller\AbstractCrudController.php:305)
at EasyCorp\Bundle\EasyAdminBundle\Controller\AbstractCrudController->new(object(AdminContext))
(C:\PROJECTS\guestbook\vendor\symfony\http-kernel\HttpKernel.php:181)
at Symfony\Component\HttpKernel\HttpKernel->handleRaw(object(Request), 1)
(C:\PROJECTS\guestbook\vendor\symfony\http-kernel\HttpKernel.php:76)
at Symfony\Component\HttpKernel\HttpKernel->handle(object(Request), 1, true)
(C:\PROJECTS\guestbook\vendor\symfony\http-kernel\Kernel.php:197)
at Symfony\Component\HttpKernel\Kernel->handle(object(Request))
(C:\PROJECTS\guestbook\vendor\symfony\runtime\Runner\Symfony\HttpKernelRunner.php:35)
at Symfony\Component\Runtime\Runner\Symfony\HttpKernelRunner->run()
(C:\PROJECTS\guestbook\vendor\autoload_runtime.php:29)
at require_once('C:\PROJECTS\guestbook\vendor\autoload_runtime.php')
(C:\PROJECTS\guestbook\public\index.php:5)

[MatTheCat]

Does your Conference entity expose a setter for isInternational? Can you paste its code here?

[VitaliyMarkelov]

It does, at least all methods related to $isInternational are the same as in repo:

<?php

namespace App\Entity;

use App\Repository\ConferenceRepository;
use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\ORM\Mapping as ORM;

#[ORM\Entity(repositoryClass: ConferenceRepository::class)]
class Conference
{
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column]
    private ?int $id = null;

    #[ORM\Column(length: 255)]
    private ?string $city = null;

    #[ORM\Column(length: 4)]
    private ?string $year = null;

    #[ORM\Column]
    private ?bool $isInternational = null;

    /**
     * @var Collection<int, Comment>
     */
    #[ORM\OneToMany(targetEntity: Comment::class, mappedBy: 'conference', orphanRemoval: true)]
    private Collection $comments;

    public function __construct()
    {
        $this->comments = new ArrayCollection();
    }


	public function __toString(): string
    {
        return $this->city.' '.$this->year;
    }

    public function getId(): ?int
    {
        return $this->id;
    }

    public function getCity(): ?string
    {
        return $this->city;
    }

    public function setCity(string $city): static
    {
        $this->city = $city;

        return $this;
    }

    public function getYear(): ?string
    {
        return $this->year;
    }

    public function setYear(string $year): static
    {
        $this->year = $year;

        return $this;
    }

    public function isInternational(): ?bool
    {
        return $this->isInternational;
    }

    public function setInternational(bool $isInternational): static
    {
        $this->isInternational = $isInternational;

        return $this;
    }

    /**
     * @return Collection<int, Comment>
     */
    public function getComments(): Collection
    {
        return $this->comments;
    }

    public function addComment(Comment $comment): static
    {
        if (!$this->comments->contains($comment)) {
            $this->comments->add($comment);
            $comment->setConference($this);
        }

        return $this;
    }

    public function removeComment(Comment $comment): static
    {
        if ($this->comments->removeElement($comment)) {
            // set the owning side to null (unless already changed)
            if ($comment->getConference() === $this) {
                $comment->setConference(null);
            }
        }

        return $this;
    }
}

[MatTheCat]

I guess your setter should be setIsInternational (and not setInternational) as your property is called isInternational?

[michaljusiega]

And be careful, when property has equal-name accessor-method (setter/getter). In your case you have isInternational method like your property $isInternational. See #54488 for more.

[VitaliyMarkelov]

@MatTheCat I guess the same, but tutorial's class doesn't have it either. Anyway, I wiped this and started from scratch. Thank you for your help.

[VitaliyMarkelov]

@michaljusiega I would never use such a risky name for a property myself, but this isn't my idea, it is official SF book's one ).