How to get data from different model for select? - zend-framework2

Question

I have form with some attributes:
class ToraForm extends Form
{
public function __construct($name = null)
{
parent::__construct('tora');
$this->setAttribute('method', 'post');
$this->add(array(
'name' => 'id',
'attributes' => array(
'type' => 'hidden',
),
));
$this->add(array(
'name' => 'name',
'attributes' => array(
'type' => 'text',
'required' => true,
),
'options' => array(
'label' => 'name',
),
));
}
but I want add drop-down list with data taken from another model. How to do it?

Answer 1

There are several different approaches you can take. Ultimately your Form has a dependency, which needs to be injected. I have written an in-depth blog-post about the three most common use-cases for Form-Dependencies for a Select-List.
Zend\Form\Element\Select and Database-Values
My BlogPost covers the following scenarios:
Zend\Form\Element\Select via DbAdapter
Zend\Form\Element\Select via TableGateway
DoctrineModule\Form\Element\DoctrineObject via Doctrine2
Here i will demonstrate only the DbAdapter approach without much explanation. Please refer to my blogpost for the in-depth explanations.
public function formDbAdapterAction()
{
$vm = new ViewModel();
$vm->setTemplate('form-dependencies/form/form-db-adapter.phtml');
$dbAdapter = $this->getServiceLocator()->get('Zend\Db\Adapter\Adapter');
$form = new DbAdapterForm($dbAdapter);
return $vm->setVariables(array(
'form' => $form
));
}
Then the respective Form Class:
class DbAdapterForm extends Form
{
protected $dbAdapter;
public function __construct(AdapterInterface $dbAdapter)
{
$this->setDbAdapter($dbAdapter);
parent::__construct('db-adapter-form');
$this->add(array(
'name' => 'db-select',
'type' => 'Zend\Form\Element\Select',
'options' => array(
'label' => 'Dynamic DbAdapter Select',
'value_options' => $this->getOptionsForSelect(),
'empty_option' => '--- please choose ---'
)
));
}
// more later...
// Also: create SETTER and GETTER for $dbAdapter!
}
And last but not least the DataProvider function:
public function getOptionsForSelect()
{
$dbAdapter = $this->getDbAdapter();
$sql = 'SELECT t0.id, t0.title FROM selectoptions t0 ORDER BY t0.title ASC';
$statement = $dbAdapter->query($sql);
$result = $statement->execute();
$selectData = array();
foreach ($result as $res) {
$selectData[$res['id']] = $res['title'];
}
return $selectData;
}

Answer 2

My use is like that:
Class Useful{
/**
* All languages
* #return array
*/
public static function getLanguages(){
return array(
'fr_DZ'=>'Algeria - Français',
'es_AR'=>'Argentina - Español',
'en_AU'=>'Australia - English',
'nl_BE'=>'België - Nederlands',
'fr_BE'=>'Belgique - Français',
'es_BO'=>'Bolivia - Español',
'bs_BA'=>'Bosna i Hercegovina - Hrvatski',
...
);
}
}
After I use like that:
$this->add(array(
'type' => 'Zend\Form\Element\Select',
'name' => 'languages',
'attributes'=>array(
'multiple'=>"multiple",
),
'options' => array(
'label' => 'My languages I speak',
'description' => '',
'value_options' => Useful::getLanguages()
),
));