ZF2 How to add model class of sub items to main model - php

Question

I've got a simple index action:
$reminders = $this->reminderTable->fetchAll();
foreach ($reminders as $reminder) {
$reminder->receivers = $this->reminderTable->getReceivers($reminder->id);
}
return new ViewModel(array(
'reminders' => $reminders
));
The get receivers (sub items of the main table) looks like this:
public function getReceivers($id)
{
$adapter = $this->tableGateway->getAdapter();
$receiversTable = new TableGateway('ga_reminders_receivers', $adapter);
$resultSet = $receiversTable->select(function (Select $select) use ($id) {
$select->join('ga_users', 'ga_reminders_receivers.receiver_uid = ga_users.uid', array('uid', 'firstname', 'lastname', 'email', 'telephone'), 'left');
$select->where('ga_reminders_receivers.rid = ' . $id);
});
return $resultSet;
}
This gives me the fancy error
This result is a forward only result set, calling rewind() after
moving forward is not supported.
So, I guess my question is this: When I do a fetch of a resultset it fils in the model class thanks to exchangearray(). But how am I suppose to fill a model property with a list of sub models?
In this case the model is Reminder:
class Reminder { // from the reminders table
public function exchangeArray($data)
{
$this->id = (!empty($data['rid'])) ? str_pad($data['rid'], 5, '0', STR_PAD_LEFT) : null;
$this->label = (!empty($data['label'])) ? $data['label'] : null;
// etc.
$this->receivers = array(
new Receiver(1),
new Receiver(2),
// list of objects from the reminders_receivers table
)
}
Second question: Is the separate getReceivers() method needed? Maybe it can be integrated in 1 query. As long as the model classes Reminder and Receiver are used it is OK.

Answer 1

In this cases you have to use buffer.
public function getReceivers($id)
{
$adapter = $this->tableGateway->getAdapter();
$receiversTable = new TableGateway('ga_reminders_receivers', $adapter);
$resultSet = $receiversTable->select(function (Select $select) use ($id) {
$select->join('ga_users', 'ga_reminders_receivers.receiver_uid = ga_users.uid', array('uid', 'firstname', 'lastname', 'email', 'telephone'), 'left');
$select->where('ga_reminders_receivers.rid = ' . $id);
});
$resultSet->buffer();
return $resultSet;
}