Разработка компонента: не сохраняются данные в таблицу компонента - Joomla 3.x: Общие вопросы

        defined ('_JEXEC') or exit ();

	class MediaLibModelBook extends JModelAdmin {

		public function getForm ($data = array (), $loadData = true) {

			$form = $this->loadForm (
										'com_medialib.book',
										'book',
										array (
											'control'=>'book',

											'load_data'=>$loadData 


										)
			);

			if (empty($form)) {

				return FALSE;
			}
			else {

				return $form;
			}

		}

		public function getTable($type = 'Book', $prefix = 'MediaLibTable', $config = array()) {
			
			return JTable::getInstance($type, $prefix, $config);
		}

	}

	defined ('_JEXEC') or exit ();

	class MediaLibTableBook extends JTable {
	
		public function __construct(&$db) {

			parent::__construct('#__com_medialib_content_objects', 'id', $db);

		}
	}

        defined ('_JEXEC') or exit ();

	class MediaLibViewBook extends JViewLegacy {

		protected $form;
		protected $item;


		public function display ($tpl = null) {

			$this->form = $this->get('Form');
			$this->item = $this->get('Item');
			
			$this->addToolbar ();

			$this->setDocument ();

			parent::display($tpl);

		}

		protected function addToolBar() {
		
			JToolBarHelper::title(JText::_('COM_MEDIALIB_BOOKS_MANAGER_NEW_BOOK_JML_TOOLBAR_TITLE'));
		
			JToolBarHelper::save('book.save');
			JToolBarHelper::cancel('book.cancel');
		
		}
	
		protected function setDocument() {

			$document = JFactory::getDocument();
			$document->setTitle(JText::_('COM_MEDIALIB_BOOKS_MANAGER_NEW_BOOK_PAGE_TITLE'));
		
		}
	}

	defined ('_JEXEC') or exit ();

	class MediaLibControllerBook extends JControllerForm {

		protected $view_list = 'books';
	}

	public function save($data)
	{
		$old = $this->getState($this->getName(). '.id');
		parent::save($data);
		$new = $this->getState($this->getName(). '.id');
		echo $old . '-' . $new;
		exit();
	}