Deleting Multiple selected items from table - cakephp

Question

In my table I have a column with a check box for each row. I want to be able to delete all the selected items. I found the code from this website and modified it for my own stuff.
Link
I followed the website's naming convention for the check boxes and it is as follows:
<td> <?php echo $this->Form->checkbox('LocalClocks.id.['.$LocalClock['LocalClock']['id'].']', array('value' => $LocalClock['LocalClock']['id'])); ?></td>
This is the code in my controller for the deleteSelected() function:
public function deleteSelected()
{
foreach($this->data['LocalClocks'] as $key => $value)
{
if($value != 0)
{
$this->LocalClock->del($value);
}
}
$this->redirect($this->referer());
}
This is the code for the actual delete button (just in case it is needed):
<?php echo $this->Form->postLink('Delete Selected', array('action' => 'deleteSelected'), array('confirm' => 'Are you sure?')); ?>
There are a couple things I think might be the problem:
The code was written for an older version of cake, I think the website said 1.3, but I don't know what to update/correct in the existing code to make it work.
The delete button is the same as the one on cakephp's website on the blog tutorial. The only change I made was removing the id of the item to delete, because im not deleting a single item but multiple items.
Any help would be great.

Answer 1

Your checkbox input should be something like this
echo $this->Form->checkbox('LocalClocks.'.$LocalClock['LocalClock']['id'], array(
'value' => $LocalClock['LocalClock']['id'],
'hiddenField' => false
));
This will create a data array that will look like this
array(
'LocalClocks' => array(
1 => 1,
42 => 1
)
);
And will omit any unchecked ones from the data array because we're not using the hidden field. Finally, just a couple changes to your action
public function deleteSelected()
{
foreach($this->request->data['LocalClocks'] as $key => $value)
{
$this->LocalClock->delete($key);
}
$this->redirect($this->referer());
}
I prefer using Model::delete() to Model::deleteAll() because it runs the callbacks, where deleteAll does not.
Finally, your link will actually be a submit button. This will POST the data to the controller.
echo $this->Form->end('Submit');
If you want to use ajax, use the JsHelper to submit it instead. The following creates an Ajax submission that updates the dom element #mytable with the results of the action (in this case the referer that you redirect to).
echo $this->Js->submit('Submit', array(
'update' => '#mytable'
));
echo $this->Form->end();

Answer 2

once you got the list of your checked boxes; rather than using foreach loop to delete your ids one by one try this:
$this->Model->deleteAll(array('Model.column' => array($keys)));