<?php echo $this->Form->create('Image',array('type' => 'file','url'=>array('controller'=>'images','action'=>'add'),'id'=>'imageForm')); ?>

        <?php echo $this->Form->file('image'); ?>
        <?php echo $this->Form->input('description',array('type'=>'text','id'=>'desc')); ?>
        <?php echo $this->Form->input('date', array('label' => 'Fin')); ?>
        <?php echo $this->Form->end('Ajouter') ?>

-----------
add action
-----------
	if ($this->request->is('post')) {
                if(!empty($this->request->data["Image"]["image"]["tmp_name"]))
                {
        			$this->Image->create();
                    $this->Image->save($this->request->data);
                    debug($this->Image);
                    $this->Session->write("id_image",$this->Image->id);

                   // $this->redirect($this->Session->read('last_page'));
                }