Silverstripe who to submit Form into Formextension - forms

Question

I use silverstripe 4.0.3
I made and extension for a Form. I adde the extension via yml to PageController. This is my Extension Class:
class NewsLetterFormExtension extends DataExtension
{
private static $allowed_actions = [
'NewsletterForm'
];
public function NewsletterForm()
{
$form = Form::create(
null,
__Function__,
FieldList::create(
LiteralField::create('Newsletter','<h2>NewsLetter</h2>')
->addExtraClass(''),
LiteralField::create('NLContent','<p>Erfaharen sie regelmäßig was uns beschäftigt</p>')
->addExtraClass(''),
TextField::create('FirstName')
->setAttribute('palceholder', 'Vorname')
->addExtraClass(''),
TextField::create('Surname')
->setAttribute('palceholder', 'Nachname')
->addExtraClass(''),
EmailField::create('Email')
->setAttribute('palceholder', 'E-mail Adresse')
->addExtraClass('')
),
FieldList::create(
FormAction::create('handleNewsletter', 'Senden')
->addExtraClass('btn btn-primary btn-sm')
),
RequiredFields::create('FirstName','Surname', 'Email')
);
return $form;
}
public function handleNewsletter($data, $form)
{
$Newsletter = Newsletter::create();
$form->saveInto($Newsletter);
try {
$Newsletter->write();
} catch (\Exception $e) {
return $e->getMessage();
}
$form->sessionMessage('Danke für die Newsletter Anmeldung', 'good');
return $this->redirectBack();
}
}
As Controller i am passing null. What would be the correct controller to submit it into the extension? Or is it even possible to do so?
I tried to pass it PageController and handle submission there. But I can not get it to work.
An actually i'd would like to submit into it self so that i can add it to multible page types.

Answer 1

You could try extending the Form class. This isn't tested but should work :)
NewsletterForm.php
class NewsletterForm extends Form {
function __construct($controller, $name) {
$form_name = $name;
$fields = FieldList::create(
LiteralField::create('Newsletter','<h2>NewsLetter</h2>')
->addExtraClass(''),
LiteralField::create('NLContent','<p>Erfaharen sie regelmäßig was uns beschäftigt</p>')
->addExtraClass(''),
TextField::create('FirstName')
->setAttribute('palceholder', 'Vorname')
->addExtraClass(''),
TextField::create('Surname')
->setAttribute('palceholder', 'Nachname')
->addExtraClass(''),
EmailField::create('Email')
->setAttribute('palceholder', 'E-mail Adresse')
->addExtraClass('')
);
$actions = FieldList::create(
FormAction::create('handleNewsletter', 'Senden')
->addExtraClass('btn btn-primary btn-sm')
);
$validator = RequiredFields::create('FirstName','Surname', 'Email')
parent::__construct($controller, $form_name, $fields, $actions, $validator);
}
handleNewsletter($data, $form) {
$Newsletter = Newsletter::create();
$form->saveInto($Newsletter);
try {
$Newsletter->write();
} catch (\Exception $e) {
return $e->getMessage();
}
$form->sessionMessage('Danke für die Newsletter Anmeldung', 'good');
return $this->redirectBack();
}
}
NewsletterFormExtension.php
class NewsLetterFormExtension extends DataExtension {
private static $allowed_actions = [
'NewsletterForm'
];
public function NewsletterForm() {
$f = new NewsletterForm($this, 'NewsletterForm');
return $f;
}
}