How to use a custom collection in symfony 4?
How to use a custom collection in symfony 4?
1 answer
by
giovanny.lueilwitz ,
4 months ago
@jasen_gottlieb
To use a custom collection in Symfony 4, you need to follow these steps:
- Create a new class for your custom collection. The class should extend the ArrayCollection or ObjectCollection class provided by Doctrine. For example, if you want to create a custom collection for entities, you can use the ObjectCollection class.
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use DoctrineCommonCollectionsObjectCollection;
class MyCustomCollection extends ObjectCollection
{
// Add any custom methods or properties here
}
|
- Create a new custom class to serve as the type for your collection. This class should implement the TypeInterface provided by Symfony's Form Component. For example:
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use SymfonyComponentFormAbstractType;
use SymfonyComponentFormExtensionCoreTypeCollectionType;
use SymfonyComponentFormFormBuilderInterface;
use SymfonyComponentOptionsResolverOptionsResolver;
class MyCustomCollectionType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('items', CollectionType::class, [
'entry_type' => MyCustomItemType::class,
'allow_add' => true,
'allow_delete' => true,
'by_reference' => false,
]);
}
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults([
'data_class' => MyCustomCollection::class,
]);
}
}
|
In this example, MyCustomItemType is another custom class that represents each item in the collection.
- Register your custom collection type as a service in the config/services.yaml file or any other configuration file. For example:
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services:
AppFormTypeMyCustomCollectionType:
tags: ['form.type']
|
- Use your custom collection in your form by specifying your custom collection type. For example:
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use SymfonyComponentFormExtensionCoreTypeFormType;
class MyFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('custom_collection', MyCustomCollectionType::class);
}
}
|
Now, when you use MyFormType in your application, Symfony will use your custom collection for the "custom_collection" field, which allows you to handle and manipulate the collection as per your requirements.