Invalid type given. String expected - Zend Framework 2 - zend-form

Question

Im working on Zend Framework 2 especially with Zend Forms. I have declared a Select dropdown box in
Form:
$selectElement = new Element\Select('selectElement');
$selectElement->setAttribute('title', 'Select a Value')
->setAttribute('id', 'id');
$data = array(
array(
//Fetching the values from database
),
);
$selectElement->setAttribute('multiple', 'multiple')
->setValueOptions($data);
$this->add($selectElement);
InputFilter:
$inputFilter->add($factory->createInput(array(
'name' => 'selectElement',
'required' => false,
'filters' => array(
array(
'name' => 'Int'
),
),
)));
I have used Zend Debug to get the values which are in the selectElement dropbox in this fashion:
$dataSelectElements = $this->getRequest()->getPost('selectElement');
\Zend\Debug\Debug::dump($dataSelectElements);
Debug Result:
array(4) {
[0] => string(2) "20"
[1] => string(2) "22"
[2] => string(2) "23"
[3] => string(2) "75"
}
Basically Im getting the id's from the selectElement form to store it in the database. Right now Im getting a notice and zend form error:
Notice Error:
Notice: Array to string conversion in ..\zendframework\zendframework\library\Zend\Filter\Int.php on line 29
And a form invalid error:
array(1) {
[0] => array(1) {
["selectElement "] => array(1) {
["explodeInvalid"] => string(35) "Invalid type given. String expected"
}
}
}
Is there a solution to over come this problem. Any help would be appreciated.

Answer 1

The Int filter will attempt to make an Integer out of your array of data, which is not going to work.
Previously I've used the Callback filter, which can be used to loop through the data and check if each value is an Int.
For example:
'filters' => array(
array(
'name' => 'Callback',
'options' => array(
'callback' => function($values) {
return array_filter($values, function($value) {
return ((int)$value == $value);
});
}
)
),
),

Answer 2

I did bit differently, something like this
form
class Companyform extends Form
{
public function __construct()
{
// we want to ignore the name passed
parent::__construct('company');
$this->setAttribute ('method', 'post');
$this->setAttribute ('class', 'form-horizontal');
$this->add ( array (
'name' => 'parentID',
'type' => 'Zend\Form\Element\Select',
'attributes' => array(
'id' => 'parentID',
'type' => 'select',
'placeholder' => "Parent Company",
),
'options' => array(
'label' => 'Parent Company'
)
));
$this->add(array(
'name' => 'btnsubmit',
'attributes' => array(
'id' => 'btnsubmit',
'type' => 'submit',
'value' => 'Add',
'class' => 'btn btn-primary'
),
));
}
}
controller
public function addAction()
{
$request = $this->getRequest();
$companyList = $this->_getCompanyList();
$form = new Companyform();
$form->get('parentID')->setAttribute('options',$companyList);
if ($request->isPost())
{
$company = new Company();
$form->setInputFilter($company->getInputFilter());
$form->setData($request->getPost());
if ($form->isvalid())
{
}
}
}
public function _getCompanyList()
{
$companies = $this->Em()->getEntityManager()->getRepository('XXXX\Entity\Company')->findBy(array('isDeleted'=>'0'));
$companyIDList = array();
$companyIDList[0] = "No Parent";
foreach ($companies as $company)
{
$companyIDList[$company->id] = $company->companyName;
}
return $companyIDList;
}
Entity class
protected $inputFilter;
public function setInputFilter(InputFilterInterface $inputFilter)
{
throw new \Exception("Not used");
}
public function getInputFilter()
{
if (!$this->inputFilter) {
$inputFilter = new InputFilter();
$factory = new InputFactory();
$inputFilter->add($factory->createInput(array(
'name' => 'companyName',
'required' => true,
'filters' => array(
array('name' => 'StripTags'),
array('name' => 'StringTrim'),
),
'validators' => array(
array(
'name' => 'StringLength',
'options' => array(
'encoding' => 'UTF-8',
'min' => 2,
'max' => 255,
),
),
),
)));
$this->inputFilter = $inputFilter;
}
return $this->inputFilter;
}
You may need to add following library in entity
use Zend\InputFilter\InputFilter;
use Zend\InputFilter\Factory as InputFactory;
use Zend\InputFilter\InputFilterAwareInterface;
use Zend\InputFilter\InputFilterInterface;

Answer 3

In ZendFramework 2, when you creating a (add) element from your Form file, Check the attribute: inarrayvalidator is true.
$this->add(array(
'name' => 'select_name',
'type' => 'select',
'id' => 'select_name',
'options' => array(
'label' => 'Select Name',
),
'attributes' => array(
'id' => 'select_id',
'inarrayvalidator' => true,
),
));
I hope, this works...