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Editorial Team
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Asked: 2026-06-11T23:24:35+00:00

I added validation to a form and found that in some cases it is

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I added validation to a form and found that in some cases it is losing the invalid data I am feeding it and saving 0s instead. The output at the bottom shows that if I post the latitude as ‘zzzzzz‘, which is clearly not a number nor between -90 and 90, the form is declared as valid and saved with the value 0.

How can that happen given that I have declared the input must be a number?

ProxyType.php buildForm():

$builder
        ->add('siteName', null, array('label' => 'Site name'))
        ....
        ->add('latitude', 'number', array('label' => 'Latitude'))
        ->add('longitude', 'number', array('label' => 'Longitude'))
        ....
    ;

ProxyController.php createAction:

    ....
    $postData = $request->request->get('niwa_pictbundle_proxytype');
    $this->get('logger')->info('Posted latitude = '.$postData['latitude']);

    $form    = $this->createForm(new ProxyType(), $entity);
    $form->bindRequest($request);

    if ($form->isValid()) {
        $this->get('logger')->info('Form declared valid : latlong ('.$entity->getLatitude().','.$entity->getLongitude().')');
        ....

validation.yml:

Acme\PictBundle\Entity\Proxy:
properties: 
    longitude:
        - Min: { limit: -180 }
        - Max: { limit: 180 }
    latitude:
        - Max: { limit: 90 }
        - Min: { limit: -90 }

Output:

[2012-09-28 02:05:30] app.INFO: Posted latitude = zzzzzz [] []
[2012-09-28 02:05:30] app.INFO: Form declared valid : latlong (0,0) [] []
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1 Answer

  1. Editorial Team

    What’s happening is you’re not using a number validation, but rather bounding the form field to be a number, thus when you bind the request to the form it transforms the string into a number (which for any string which starts without a number will be 0). A form field being a number means it expects to come as a number, or rather, there should be some validation in the front-end of such thing or the front-end should not allow a non-number to be set.

    I think what you seem to want is a form field of type text with a number validation.

    For actual validation use the constraint type (additional to your min and max values).

    http://symfony.com/doc/current/book/validation.html

    http://symfony.com/doc/current/reference/constraints/Type.html

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