public function render ($content = null)
		{
			// Custom error output.
			$errors = $this->model->getErrors($this->attribute);

			if (count($errors) == 0)
				$this->parts[ '{error}' ] = '';
			else
			{
				$class = isset($this->errorOptions[ 'class' ]) ? ' class="' . $this->errorOptions[ 'class' ] . '"' : '';
				$this->parts[ '{error}' ] = '<div' . $class . '><ul class="list-unstyled">';
				foreach ($errors as $e)
				{
					$this->parts[ '{error}' ] .= '<li>' . $e . '</li>';
				}
				$this->parts[ '{error}' ] .= '</ul></div>';
			}

			return parent::render($content);
		}