8000 [Form] Document "class constraints" for data class-less forms · Issue #18969 · symfony/symfony-docs · GitHub
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PrOF-kk opened this issue Oct 2, 2023 · 5 comments
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[Form] Document "class constraints" for data class-less forms #18969

PrOF-kk opened this issue Oct 2, 2023 · 5 comments
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@PrOF-kk
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PrOF-kk commented Oct 2, 2023 •
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Symfony supports using a Form without using a Data Class.
In that page it mentions how to validate individual fields using a constraint, however it's also possible to add constraints to the root form:

  • In the controller ->
$form = $this
    ->createFormBuilder(null, [
        'constraints' => [
            new Expression([
                'expression' => 'value["firstName"] == "john"',
            ])
        ]
    ])
    ->add('firstName')
    ->add('lastName')
    ->getForm();

(src)

  • In the FormType using configureOptions ->
public function configureOptions(OptionsResolver $resolver)
{
    $collectionConstraint = new Collection(array(
        'CardNumber' => array(
            new Assert\CardScheme(array(
                'schemes' => array('VISA', 'MASTERCARD', 'DISCOVER'),
                'message' => 'The credit card number you entered is invalid.'))
        ),
        'SecurityCode' => array(
            new Length(array('min' => 3, 'max' => 3))
        )
    ));

    $resolver->setDefaults(array(
        'data_class' => null,
        'constraints' => $collectionConstraint
    ));
}

(src)

(Note: Callback constraints are also allowed and have access to the whole form)
@carsonbot carsonbot added the Form label Oct 2, 2023
@OskarStark
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Interesting, I think this could be a great addition to the docs. Open for a PR against 5.4 branch?

cc @xabbuh

@xabbuh
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xabbuh commented Oct 14, 2023

I think it would be a good idea to expand the examples around this a bit.

@PrOF-kk
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PrOF-kk commented Oct 27, 2023

Here's the 2nd example brought into more modern PHP.

function configureOptions(OptionsResolver $resolver): void {
    $collectionConstraint = new Collection([
            'CardNumber' => [
                    new CardScheme([
                            'schemes' => ['VISA', 'MASTERCARD', 'DISCOVER'],
                            'message' => 'The credit card number you entered is invalid.'
                    ])
            ],
            'SecurityCode' => [
                    new Length(exactly: 3)
            ]
    ]);

    $resolver->setDefaults([
            'data_class' => null,
            'constraints' => $collectionConstraint
    ]);
}

Should I create a complete example formtype or two for this?

@OskarStark
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Friendly ping @alexandre-daubois if you want to help 🤓

@alexandre-daubois alexandre-daubois mentioned this issue Oct 28, 2023
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@alexandre-daubois
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I gave it a try!

@xabbuh xabbuh added the hasPR A Pull Request has already been submitted for this issue. label Oct 28, 2023
@MatTheCat MatTheCat mentioned this issue Dec 31, 2024
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@xabbuh xabbuh mentioned this issue Jan 8, 2025
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javiereguiluz added a commit that referenced this issue Jan 9, 2025
@javiereguiluz
minor #20547 [Form] wrap multiple constraints in a Collection constra…
36337e9 
…int to validate array-like data (xabbuh)

This PR was merged into the 6.4 branch.

Discussion
----------

[Form] wrap multiple constraints in a Collection constraint to validate array-like data

fixes symfony/symfony#59332, replaces #20487

see also #18969 (comment)

Commits
-------

6e71ed0 wrap multiple constraints in a Collection constraint to validate array-like data
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@OskarStark @xabbuh @alexandre-daubois @carsonbot @PrOF-kk
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