Edit method adds a new model instead of just updating the data

[izzy_dizzy]

Hi all.

I can't figure out why my application keeps on adding new records when
I edit a certain record.

here's my edit method in controller:

        function edit($id = null) {
                if (empty($this->data)){
                        $this->Event->id = $id;
                        $this->data = $this->Event->read();
                        $this->set('categories', $this->Category->find('list'));
                        if (empty($this->data['Event']['name'])) {
                                $this->Session->setFlash('Invalid Event ID.');
                                $this->redirect(array('action'=>'calendar'), 
null, true);
                        }
                }
                else{
                        $clean = new Sanitize();

                        $this->data['Event']['name'] = 
$clean->html($this->data['Event']
['name']);
                        $this->data['Event']['desc'] = 
$clean->html($this->data['Event']
['desc']);
                        $this->data['Event']['user_id'] = 41;

                        if ($this->Event->save($this->data)) {
                                $this->Session->setFlash(__('Event updated.', 
true));
                                $this->redirect(array('action'=>'calendar'), 
null, true);
                                exit();
                        } else {
                                $this->Session->setFlash('The Event could not 
be saved. Please,
try again.');
                        }
                }
        }

edit.ctp:
<?php
        echo $form->create('Event', array('type'=>'file', 'url' => array
('controller' => 'events', 'action' => 'edit')));
                echo $form->input('Event.name', array('label'=>'Event'));
                echo 'Details<br/>'.$form->textarea('Event.desc');
                echo $form->input('keywords');

                echo $form->input('Event.category_id', array('type'=>'select',
'options'=>$categories, 'empty'=> '--select
category--','label'=>'Categories'));

                echo $form->input('Event.venue', array('type'=>'text',
'label'=>'Venue'));
                echo $form->input('Event.start_date', array('type'=>'text',
'label'=>'Start Date'));
                echo $form->input('Event.end_date', array('type'=>'text',
'label'=>'End Date'));
                echo '<label>Image</label>'.$form->file('Image', array
('label'=>'Image'));
//              echo '<br/><br/><label>Video</label>'.$form->file('videoFile',
array('label'=>'Video'));

        echo $form->end('Update Event');
?>
</div>

It really gives me head ache so please help.

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