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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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Rewords and minor fixes
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@javiereguiluz
javiereguiluz authored Mar 22, 2017
commit 6d2a1e41100431f3a7570d3d53ff68e736fd10c7
32 changes: 19 additions & 13 deletions validation.rst
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Expand Up @@ -449,27 +449,33 @@ If you're ever unsure of how to specify an option, either check the API document
for the constraint or play it safe by always passing in an array of options
(the first method shown above).

.. index::
single: Validation; Constraint targets

.. _validator-constraint-targets:

Constraint in Form Classes
------------------
Constraints 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::
Constraints can be defined while building the form via the ``constraints`` option
of the form fields::

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

Please note the *constraints* keyword will only be available if you have
added the *ValidatorExtention* to the formBuilder::
The ``constraints`` option is only available when adding the ValidatorExtention
to the formBuilder::

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

.. index::
single: Validation; Constraint targets

.. _validator-constraint-targets:

Constraint Targets
------------------
Expand Down