Object of class Doctrine\ORM\PersistentCollection could not be converted to string
For manage a ManyToMany relation between User and Mission
in User.php:
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToMany(targetEntity="Your\SuperBundle\Entity\Mission", inversedBy="users", orphanRemoval=true)
* @ORM\JoinTable(name="user_mission")
*/
private $missions;
in Mission.php:
/**
* @var \Doctrine\Common\Collections\ArrayCollection
*
* @ORM\ManyToMany(targetEntity="Your\SuperBundle\Entity\User", mappedBy="missions", cascade={"all"}, orphanRemoval=true)
*/
private $users;
then for your form:
http://symfony.com/doc/current/reference/forms/types/collection.html for manage collection of Mission in your User form.
take a look at "type" and "allow_add"
Gianni Alessandro
I am an Aerospace Engineering, currently employed in a Part-147 as a Ground Instructor.
Updated on June 04, 2022Comments
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Gianni Alessandro almost 2 years
I made a web application with Symfony2, in which a User has an array correlation ManytoMany with the entity Mission. The User can upload the entity $product through a form, and one of the data passed by the form is the mission associated to the user.
When I try to upload the data, appears the error:
ContextErrorException: Catchable Fatal Error: Object of class Doctrine\ORM\PersistentCollection could not be converted to string in C:\BitNami\wampstack-5.4.23- 0\frameworks\symfony\vendor\doctrine\dbal\lib\Doctrine\DBAL\Statement.php line 103
It's clear that Doctrine don't know how to save the value of the mission.
How can I manage it?
I didn't know neither how to declare the mission object in my product entity. Now is simply like this:
/** * @var string * * @ORM\Column(name="mission", type="string", length=255) */ protected $mission;
UPDATE ---
My controller now is:
$form = $this->createFormBuilder($product) ->add('name', 'text') ->add('mission', 'entity', array('required' => true, 'multiple' => false, 'class' => 'AcmeManagementBundle:Mission', 'query_builder' => function($repository) { return $repository->createQueryBuilder('c')->orderBy('c.id', 'ASC'); },)) //... ->add('save', 'submit') ->getForm();
UPDATE ---
Now works, but I have a problem. When appears the form to upload the $product object, appears also the ->add('mission', 'entity'... In this field I can see all the mission stored, and not only the ones associated with the user. How should I change my controller? I tried to change my controller like this:
$product = new Product(); $product->setMission($this->getUser()->getMission());
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Gianni Alessandro over 10 yearsNow works, but I have a problem. When appears the form to upload the $product object, appears also the ->add('mission', 'entity'... In this field I can see all the mission stored, and not only the ones associated with the user. How should I change my controller? I tried with ->add('mission','collection' .. but appears error.
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Vincent Barrault over 10 yearsyou want to create a new mission, or choose one already created ?
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Admin over 9 yearsI have a similar problem here, Did it match for your problem? Thank you to help if you can.