Symfony form: create multiple emails fields - php

Question

Update
I found in the Symfony docs the answer and an example tutorial to my case: http://symfony.com/doc/current/reference/forms/types/collection.html#basic-usage
How can I assign multiple email fields to a form in Symfony 3.1?
In my entity I have:
/**
* #var array
* #ORM\Column(name="notification_emails", type="array", nullable=true)
*/
private $notificationEmails;
/**
* #return array
*/
public function getNotificationEmails()
{
return $this->notificationEmails;
}
/**
* #param array $notificationEmails
*/
public function setNotificationEmails($notificationEmails)
{
$this->notificationEmails = $notificationEmails;
}
In my form I have:
$builder->add(
'notificationEmails',
CollectionType::class,
array(
'entry_type' => EmailType::class,
'label' => 'Add more emails separated by comma',
'attr' => array(
'multiple' => 'multiple',
),
)
);
But this doesn't work :(

Answer 1

You need Collection type field, only if you are providing multiple email fields for each one email; with some help of javascript and having Add new email button.
If users are going to add emails separated by comma, you don't need a Collection Type field. Keep it simple Text type field with help text as you have done.
Now, in setter [setNotificationEmails], you should split the csv email string to array and feed to ORM. ORM does the rest in order to save in the database.
You should do the vice-versa in getter [getNotificationEmails] (converting array to string). So your form can represent comma separated emails.
In case above doesn't work, as I doubt, the form might not read data from getter. In that case, you can always use a Transformer. It's so useful.