Symfony CollectionType with no entity

Symfony CollectionType with no entity

By : Search Crush SEO
Date : November 18 2020, 03:01 PM
I hope this helps . First of all this has nothing to do with Symfony. This is a Doctrine thing. By the way, you have no overkill here, because your Model should make sense and be rational, to let you develop your codebase.
There exist so many situations in which, the programmer, designs a malformed Model, and gets into trouble, while goes through developing the codebase.
code :
class QuestionAndAnswer
     * @ORM\ManyToOne(targetEntity="QuestionAndAnswerPage", inversedBy="questionAndAnswers")
     private $questionAndAnswerPage;
class QuestionAndAnswerPage
     * @ORM\OneToMany(targetEntity="QuestionAndAnswer", mappedBy="questionAndAnswerPage")
     private $questionAndAnswers;

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Symfony form - Access Entity inside child entry Type in a CollectionType

Symfony form - Access Entity inside child entry Type in a CollectionType

By : Daniel C.
Date : March 29 2020, 07:55 AM
To fix the issue you can do The answer lies in using Event Listeners which listen for the PRE_SET_DATA event.
It will pass your closure a FormEvent class which contains both the form and the data being bound to it.
code :
public function buildForm(FormBuilderInterface $builder, array $options)
        function (FormEvent $event) use ($builder)
            $form = $event->getForm();
            $child = $event->getData();

            if ($child instanceof Child) {

                // Do what ever you like with $child entity data

Symfony CollectionType with "allow_add" not adding child entity to parent entity

Symfony CollectionType with "allow_add" not adding child entity to parent entity

By : Saqib Rehman
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , On Symfony 2.8, I got the following entities: , You missed by_reference => false in form collection definition
code :
->add('emails', CollectionType::class, [
    'label' => false,
    'entry_options' => array('label' => false),
    'entry_type' => EmailContactType::class,
    'allow_add' => true,
    'allow_delete' => true,
    'delete_empty' => true,
    'prototype' => true,
    'by_reference' => false; // <--- you missed this
How to use different input types for one entity CollectionType - Symfony 3

How to use different input types for one entity CollectionType - Symfony 3

By : Dr. Acula
Date : March 29 2020, 07:55 AM
To fix this issue You can build the form dynamically based on the answer type needed. See the docs page here. You'll have to add some logic in the event subscriber class to return an input of the correct type.
Symfony 3 - Form - CollectionType in Entity without Doctrine

Symfony 3 - Form - CollectionType in Entity without Doctrine

By : Gopinath
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I believe your error is caused because a form collection has not been implemented to handle SplObjectStorage as you would expect. You can create an issue for it at the symfony repository.
The error is caused when symfony is trying to populate the form collection by reading your products from ProductService this way:
code :
$products = $productService->getProducts();
$products->offsetExists(0); //here is the error.
        ->add('products', CollectionType::class, [
            'entry_type'   => ProductType::class,
            'property_path' => 'productsArray'

class ProductService

public function getProductsArray() {
    $prArray= [];
    foreach ($this->products as $value) {
        $prArray[] = $value;
    return $prArray;
CollectionType of EntityType Symfony Forms

CollectionType of EntityType Symfony Forms

By : Raphael Rivas
Date : March 29 2020, 07:55 AM
wish of those help I think this is not the best way to do that. You just have to add CollectionType to the FormType and update you ProductType class to handle if this is selected or not. May be you have to create a custom formtype for products for order only :-/ . All hard work are on the javascript side
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