I personally find the best way is still using the html / form helpers,
but to use a model or field name that doesn't exist. Of course, if
you want the value to persist then you'll need to store the value
somewhere - perhaps in the session.
ie, in your controller:
function edit($id = null) {
if(empty($this->data)) {
...
$this->data['Display']['currency'] = $this->Session-
>read('Display.currency');
} else {
$this->cleanUpFields();
// save the currency they selected back to the session
$this->Session->write('Display.currency', $this->data['Display']
['currency']);
...
}
}
and your view can just use
echo $html->checkbox( 'Display/currency' );
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