Zend: Form validation: value was not found in the haystack error

Question

I have a form with 2 selects. Based on the value of the first select, it updates the values of the second select using AJAX. Doing this makes the form not being valid. So, I made the next change:

        $form=$this->getAddTaskForm(); //the form

        if(!$form->isValid($_POST)) {
            $values=$form->getValues();

            //get the options and put them in $options

                $assignMilestone=$form->getElement('assignedMilestone');
                $assignMilestone->addMultiOptions($options);

        }

        if($form->isValid($_POST)) {
               //save in the database
            }else {
               //redisplay the form
            }  

Basically, I check if it is valid and it isn't if the user changed the value of the first select. I get the options that populated the second select and populate the form with them. Then I try to validate it again. However this doesn't work. Anybody can explain why? The same "value was not found in the haystack" is present.

Answer 1

You could try to deactivate the validator:

in your Form.php

$field = $this->createElement('select', 'fieldname');
$field->setLabel('Second SELECT');
$field->setRegisterInArrayValidator(false);
$this->addElement($field);

The third line will deactivate the validator and it should work.

Answer 2

You can also disable the InArray validator using 'disable_inarray_validator' => true:

For example:

    $this->add( array(
        'name'     => 'progressStatus',
        'type'     => 'DoctrineModule\Form\Element\ObjectSelect',
        'options' => array(
            'disable_inarray_validator' => true,
        ),

    )); 

Answer 3

Additionaly you should add you own InArray Validator in order to protect your db etc.

In Zend Framework 1 it looks like this:

$this->addElement('select', $name, array(
            'required' => true,
            'label' => 'Choose sth:',
            'filters' => array('StringTrim', 'StripTags'),
            'multiOptions' => $nestedArrayOptions,
            'validators' => array(
                array(
                    'InArray', true, array(
                        'haystack' => $flatArrayOptionsKeys,
                        'messages' => array(
                            Zend_Validate_InArray::NOT_IN_ARRAY => "Value not found"
                        )
                    )
                )
            )
        ));

Where $nestedArrayOptions is you multiOptions and $flatArrayOptionsKeys contains you all keys.