Comments on: Conditional Form Validation with Zend_Form

By: Adamquadmon

Adamquadmon — Mon, 15 Feb 2010 14:41:22 +0000

after a lot of tries I give up with this validator and simple put in the preValidation() method:

if ($data['datatype'] == ‘radio’) {
$this->option_1->setRequired(true);
}

where datatype is my parent field and radio is the value that need the check if child option_1 field value is not empty.

What do you think about?

By: jeremy

jeremy — Fri, 15 Jan 2010 11:41:43 +0000

Yeah, that allowEmpty can be a bear. Glad to hear it’s working for you.

By: Neil

Neil — Fri, 15 Jan 2010 08:49:43 +0000

Great Script.
Thanks
Had a bit of trouble with it at first as I hadn’t read the write up properly and missed the bit about setting the allowEmpty flag on the validated element. Very simple to use once this is in place.

By: omar

omar — Tue, 13 Oct 2009 14:36:09 +0000

The problem i had was that my custom validator was not being called when the value of the input (select) was empty. I couldnt use setRequired() because in some cases (dependent upon another form value) i want to process empty values.
The solution was to do the following:

$organiser_member = new Zend_Form_Element_Text(’organiser_member’);
$organiser_member->setLabel(’* Organiser:’);

// Force empty values through the custom validator!
$organiser_member->setRequired(false);
$organiser_member->setAllowEmpty(false);

// Add the custom validator
$organiser_member->addPrefixPath(’BC_Validate’, ‘BC/Validate’, ‘validate’);
$organiser_member->addValidator(’EventOrganiser’, false);
$form->addElement($organiser_member);

Now the custom validator is always called, whether the input ‘organiser_member’ is set or not.

By: Mark

Mark — Mon, 14 Sep 2009 21:57:33 +0000

Another way to solve this problem is oveload method Zend_Form::isValid for example:
public function isValid($data)
{
// First validation
$result = parent::isValid($data);

// Add optional second validator if first pass form is ok
if ($result == true and $this->getValue(’type’)==’MEM’) {
$element = $this->getElement(’type’);
$element->addValidator(new Zend_Validate_Date());
$result = parent::isValid($data);
}

return $result;
}

By: Phil

Phil — Tue, 21 Jul 2009 23:01:32 +0000

I want something exactly like this, but I don’t think I’ll be able to use yours. It seems to implement the letter of Zend_Validate_Interface, but not the spirit. ZVI requires the function isValid($value). You implemented that with isValid($value, $context=null). It technically implements the interface, but whenever you call that function with a null context, it errors out. So you can’t use this with something like Zend_Filter_Input that hides the isValid call from you.

By: Lauxa

Lauxa — Thu, 18 Jun 2009 12:27:15 +0000

My situation is a little different because the customer wants to be able to change validators field by field at runtime. I wrote a “Not Duplicate” custom validator that depends on a form_fieldDuplicate() routine being in the model. To do conditional validators I’ll either have to hard code this validator or set up a way to select the parent field, perhaps in a dropdown. Either way, thanks for the article.

By: How to Get Six Pack Fast

How to Get Six Pack Fast — Wed, 15 Apr 2009 16:38:34 +0000

I can tell that this is not the first time at all that you write about the topic. Why have you chosen it again?

By: jeremy

jeremy — Mon, 19 Jan 2009 13:15:24 +0000

@Andreas I've never dealt with that before, so I don't have a good answer for you. I suggest heading over to Nabble and asking the ZF community for some recommendations.

By: Andreas~

Andreas~ — Mon, 19 Jan 2009 13:04:49 +0000

Hey all,

thanks for that nice validator I was looking longtime for. Great job. I have one more question: If i try to use it for an file_upload element. It does not work. The Problem ist that the $context is null. so that there is no array where you can check if the contextkey is in. If I send a file -> the $context is the well known $file array…. So till now I could not realize to find this solution above if a file upload is required when the radio button is set to “Upload a File”. Any Ideas? Especially i found out that the isValid method is not started when no file is choosen. Thanks for some comments A~