CakePHP: Form helper with saveMany() to edit multiple rows at once - php

Question

In my view (/View/Tests/admin_edit.ctp) I want to edit multiple rows (from a different model) by pointing the form to the QsetsController and the "admin_order" action then use the saveMany($this->request->data) to update all changes.
/View/Tests/admin_edit.ctp:
echo $this->Form->create( 'Qset', array('action'=>'order', 'admin'=>1));
$n = 1;
foreach ($qsets as $qset) : ?>
<h3>Question set <?php echo $n; $n++;?></h3>
<?php echo $this->Form->input('Qset.'.$n.'.order'); ?>
<?php echo $this->Form->input('Qset.'.$n.'.id', array('type'=>'hidden') ); ?>
...
$n++;
endforeach;
echo $this->Form->end('save');
/Controller/QsetsController.php
public function admin_order() {
$data = $this->request->data; //maybe just $this->data ?
$this->Qset->saveAll($data);
$this->Session->setFlash( "Order saved.");
$this->redirect( Controller::referer() );
}
Currently, my data does not get saved (although there are no errors).
Also, only the first input echoed by the foreach loop appears with a correct order field value. Each subsequent one has no value at all.
Update:
I changed $n = 1 to $n = 0 and now the first AND second input appear with their correct order values.
update2:
The markup for the form starts like this:
<form action="/admin/qsets/order" id="QsetOrderForm" method="post" accept-charset="utf-8">
The markup for the input fields which appear correct:
<div class="input number"><label for="Qset2Order">Order</label>
<input name="data[Qset][2][order]" type="number" value="3" id="Qset2Order">
</div>
The markup that results for the empty input fields:
<div class="input number"><label for="Qset3Order">Order</label>
<input name="data[Qset][3][order]" type="number" id="Qset3Order">
</div>
Update3:
I solved the problem with the inputs not displaying correctly! Notice I was incrementing $n before echoing the the inputs, so this was creating duplicates at the end of the loop. I moved $n++ to after the inputs and now they appear correctly. Phew. Now I just need to get them to save.
Useful references:
Cake book chapter on saveMany()/saveAll()
Similar question

Answer 1

You reference the manual but probably haven't read it well enough :)
Quoting from the section for saveMany():
Note that we are passing numerical indices instead of usual $data
containing the Article key. When saving multiple records of same model
the records arrays should be just numerically indexed without the
model key.
So instead of $data pass $data['Qset'] to saveAll()/saveMany().
Also Controller::referer() is not a static method use $this->referer()