gistfile1.php

<?php

class ItemController extends Controller
{
	...
	/**
	 * Creates a new item.
	 */
	public function actionCreate()
	{
		$item = new Item();
		$this->commonEditAction($item);
	}

	/**
	 * Updates a particular item.
	 */
	public function actionUpdate()
	{
		$item = $this->loadModel();
		$this->commonEditAction($item, array('title'));
	}

	/**
	 * Changes a particular item.
	 */
	public function actionChange()
	{
		$item = $this->loadModel();
		$item->setScenario('change');
		$this->commonEditAction($item, array('image'));
	}

	/**
	 * Edits a common action.
	 * @param Item $item item model
	 * @param array $attributes list of attributes that need to be saved.
	 */
	protected function commonEditAction($item, $attributes=null)
	{
		if (isset($_POST['confirm']))
		{
			$item->attributes = $_POST['Item'];
			if ($item->validate())
			{
				if ($item->scenario !== 'update')
					$_POST['Item']['image'] = $item->image;

				$this->setPageState('x', $_POST['Item']);
				$this->render('_formConfirm', compact('item'));
				return;
			}
		}
		else if (isset($_POST['back']))
			$item->attributes = $this->getPageState('x');
		else if (isset($_POST['finish']))
		{
			$item->attributes = $this->getPageState('x');
			$item->save(false, $attributes);
			$this->redirect(array('index'));
		}

		$this->render('_form', compact('item'));
	}
	...
}