8000 Add an explanation about «constraints» validation by chindit · Pull Request #7664 · symfony/symfony-docs · GitHub
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Add an explanation about «constraints» validation #7664

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Add an explanation about «constraints» validation
chindit Mar 22, 2017
6d2a1e4
Rewords and minor fixes
javiereguiluz Mar 22, 2017
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Add an explanation about «constraints» validation 
Added an explanation about the use of «constraints» in Form Classes and the requirement of «ValidatorExtension» if «constraints» keyword is used.
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@chindit
chindit authored Mar 22, 2017
commit 70833ef53ad01b3fb4ed904b12b55989fd3afbeb
17 changes: 17 additions & 0 deletions validation.rst
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Expand Up @@ -454,6 +454,23 @@ for the constraint or play it safe by always passing in an array of options

.. _validator-constraint-targets:

Constraint in Form Classes
------------------

When creating your own form classes, you may want to add constraint directly in the formBuilder.
This is done by simply adding them as a parameter in your field options::

public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('myField', TextType::class, ['required' => true, 'constraints' => [new Length(['min' => 3])]])
}

Please note the *constraints* keyword will only be available if you have
added the *ValidatorExtention* to the formBuilder::

Forms::createFormFactoryBuilder()->addExtension(new ValidatorExtension(Validation::createValidator()))->getFormFactory();

Constraint Targets
------------------

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