Handling dependencies in Zend Framework 2 Forms

Question

I am trying to build a form in ZF2. The problem comes when I want to populate the options array of a Select input element from a database table. A response to this question Zend FrameWork 2 Get ServiceLocator In Form and populate a drop down list by @timdev pointed me to the ZF2 docs where the 'correct' method is described. I followed this carefully but I suspect that they must have left obvious code out assuming I could fill in the gaps as I cannot get it to work. Can anyone see what I am doing wrong? I start with a form to which I add a fieldset: ``` namespace Ctmm\Form; use Zend\Form\Form; class AddPropertyForm extends Form { public function __construct() { parent::__construct('AddProperty'); $this->setName('addProperty'); $this->setAttribute('method', 'post'); $this->add(array( 'name' => 'property', 'type' => 'PropertyFieldset' )); ``` } } I then create the fieldset: ``` namespace Ctmm\Form; use Ctmm\Model; use Zend\Form\Fieldset; class PropertyFieldset extends Fieldset { public f…

Accepted Answer

So I got this to work with a few minor changes:

As you noted the `PropertyFieldSet` should call the parents construct like so:

```
parent::__construct('propertyfieldset'); 
```

ElementConfig should be like so:

```
public function getFormElementConfig() {
    return array(
        'factories' => array(
            'PropertyFieldset' => function($sm) {
                $serviceLocator = $sm->getServiceLocator();
                $property_type = $serviceLocator->get('Ctmm\Model\PropertyType');
                $fieldset = new PropertyFieldset($property_type);
                return $fieldset;
            },
        )
    );
}
```

And the AddPropertyForm should be like so:

```
namespace Ctmm\Form;
use Zend\Form\Form;

class AddPropertyForm extends Form {

public function init() {

parent::__construct('AddProperty');

$this->setName('addProperty');
        $this->setAttribute('method', 'post');

$this->add(array(
            'name' => 'addproperty',
            'type' => 'PropertyFieldset',
        ));
    }
}
```

Instead of using __construct we use init(). This function is apparently called when instantiated by factory: http://framework.zend.com/apidoc/2.1/classes/Zend.Form.Form.html#init

Regarding building the select, I would pass a TableGateway object to the fieldSet instead of a model. Then using a fetchAll function we could do the following in the form:

```
class PropertyFieldset extends Fieldset {

public function __construct(PropertyTypeTable $propertyTypeTable) {
        parent::__construct('propertyfieldset');

$propertyValOpts = array();
        foreach($propertyTypeTable->fetchAll() as $propertyRow) {
            array_push($propertyValOpts,$propertyRow->property_type);
        }

$this->add(array(
            'name' => 'property_type',
            'type' => 'Zend\Form\Element\Select',
            'attributes' => array(
                'required' => true,
            ),
            'options' => array(
                'label' => 'Property Type',
                'value_options' => $propertyValOpts
            ),
        ));
    }
}
```

Hope this helps :)

Handling dependencies in Zend Framework 2 Forms

Solution

Problem

Related problems