Cakephp: add/edit/delete record

my_controller.php

function admin_add(){
		//TODO: check retype password
		if (!empty($this->data)){
			$this->Product->set($this->data);
			if ($this->Product->validates()){
				if ($this->Product->save($this->data)){
					$this->Session->setFlash("Add member successfull");
				}
				else{
					$this->Session->setFlash("Add member fail");
				}
				$this->redirect(array('action'=>'index'));
			}else{
				//$this->Session->setFlash(explode(',', $this->Product->invalFields()));
			}
		}
	}

	function admin_delete($id){
		if (isset($id) && !empty($id)){
			$this->Product->delete($id);
		}
		$this->redirect(array('action'=>'index'));
	}

	function admin_edit($id){
		$this->Product->id = $id;
		if (!empty($this->data)){
			$this->Product->set($this->data);
			if ($this->Product->validates()){
				if ($this->Product->save($this->data)){
					$this->Session->setFlash("Add member successfull");
				}
				else{
					$this->Session->setFlash("Add member fail");
				}
				$this->redirect(array('action'=>'index'));
			}else{
				//$this->Session->setFlash(explode(',', $this->Product->invalFields()));
			}
		}
		else{
			$this->data = $this->Product->read();
		}
	}