Check boxes for a noob

So I am trying to get these check boxes to populate correctly and save to the DB. (The Select window is too prone to messing things up). Any ideas why the check boxes arnt bring checked properly? Also when I change it to just a normal select list ('multiple'='true') I still get this:

Notice (8): Undefined index:  id [APP\views\users\admin_edit.ctp, line 12]

I would be grateful for any help.


~Michael



The Controller:

    function admin_edit($id = null) {
        $groups = $this->User->Group->find("list");
        $this->set('groups', $groups);
        if (empty($this->data)) {
            $this->User->id = $id;
            $this->data = $this->User->read();
            $this->data['User']['old_email'] = $this->data['User']['email'];
        } else {
            if($this->data['User']['old_email'] != $this->data['User']['email']) {
                $this->data['User']['confirm_code'] = String::uuid();
                $this->data['User']['confirmed'] = 0;
            }
            if($this->User->save($this->data)) {
                if($this->data['User']['old_email'] != $this->data['User']['email']) {
                    if($this->__sendEmail()) {
                        $this->Session->setFlash('Email has been sent');
                    } else {
                        $this->Session->setFlash('Could not send Email');
                    }
                }
                $this->flash('Your changes have been saved.','/admin/users/view/'.$this->data['User']['id'] );
            }
        }
        debug($groups);
        debug($this->data);
    }



The View:
<h2>Edit User Record (Admin Mode)</h2>

<form method="post" action="<?php echo $html->url('/admin/users/edit/'.$this->data['User']['id']); ?>">
    <?php echo $form->hidden('User.id'); ?>

    <?php echo $form->label('User.username'); ?>
    <?php echo $form->error('User.username'); ?>
    <?php echo $form->text('User.username', array('size' => '80' ) ); ?>

    <?php echo $form->label('User.Group', 'User Group (listed according to access rights)' ); ?>
    <?php echo $form->error('User.Group', 'You must select a user group'); ?>
    <?php echo $form->input('User.Group', array('type'=>'select', 'value'=>$this->data['User']['group_id'], 'options'=>$groups, 'multiple'=>'checkbox')); ?>

    <?php echo $form->label('User.name', 'User Full Name'); ?>
    <?php echo $form->text('User.name', array('size' => '80')); ?>
    <?php echo $form->error('User.name'); ?>

    <?php echo $form->hidden('User.old_email'); ?>
    <?php echo $form->label('User.email', 'User E-mail'); ?>
    <?php echo $form->text('User.email', array('size' => '80')); ?>
    <?php echo $form->error('User.email'); ?>

    <?php echo $form->label('User.active', 'Active'); ?>
    <?php echo $form->select('User.active', array('0'=>'No', '1'=>'Yes')); ?>
    <?php echo $form->error('User.active'); ?>

    <?php echo $form->label('User.confirmed', 'Confirmed'); ?>
    <?php echo $form->select('User.confirmed', array('0'=> 'No', '1'=>'Yes')); ?>
    <?php echo $form->error('User.confirmed'); ?>


    <?php echo $form->hidden('User.passwd'); ?>


    <?php echo $form->error('User.new_passwd'); ?>
   
    <?php echo $form->submit('Save Changes'); ?>
</form>

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