CONTROLLER:
function add($patient_id = null) {
if (empty($this->data)) {
if (!empty($patient_id)) {
$this->data['YourModelName']['patient_id'] = $patient_id;
}
} else {
...
}
...
}
FORM:
echo $form->create('YourModelName');
echo $form->hidden('patient_id');
LINK calling add() action for first time:
echo $html->link('New record', array(
'controller' => 'your_controller',
'action' => 'add',
9999 // <- patient id passed as an argument to add() action
));
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