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How to define a Symfony2 form (no object) with at least 1 of 2 fields?

I have a search form with two non-entity related fields. Let's say it's built like this:

$builder
    ->add('orderNumber', 'text', array('required' => false))
    ->add('customerNumber', 'text', array('required' => false))
    ;

I want users to be required to fill in at least one of the two fields.

What's the correct way to achieve this with Symfony 2.5?

Edit: is it possible to do this without adding a data class?

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2 answers


Thanks to @redbirdo's answer, I will lead to this code:

$builder
    ->add('orderNumber', 'text', array(
        'required' => false,
        'constraints' => new Callback(array($this, 'validate'))
    ))
    ->add('customerNumber', 'text', array('required' => false))
;


And the check method:

public function validate($value, ExecutionContextInterface $context)
{
    /** @var \Symfony\Component\Form\Form $form */
    $form = $context->getRoot();
    $data = $form->getData();

    if (null === $data['orderNumber'] && null === $data['customerNumber']) {
        $context->buildViolation('Please enter at least an order number or a customer number')
            ->addViolation();
    }
}
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When you use a form with an array of data rather than a base data class, you need to set validation constraints yourself and attach them to individual fields. See the Symfony documentation:

Forms → Use the form without a class → Adding Validation

for example



$builder
   ->add('orderNumber', 'text', array(
       'required' => false
       'constraints' => new NotBlank()
   ))
   ->add('customerNumber', 'text', array(
       'required' => false
       'constraints' => new NotBlank()
   ))
;

Note. As per the example documentation, "constraints" can be provided as a single constraint or an array of constraints.

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