Get file path by file name in database - Yii

fileModel.php

class File extends CActiveRecord
{
	public function rules()
	{
			array('filename', 'file', 'types'=>'pdf, doc, docx, xls, xlsx, ods, odt, zip, rar, avi, mp4, flv, txt, webm', 'allowEmpty' => true),
		);
	}

	/**
	 * Get file path by file name in database
	 *
	 * @param boolean $validate whether is needed to check if file exists
	 * @return string path to file
	 */
	public function getFilePath($validate = true)
	{
		$path = null;
		if(!$validate || !empty($this->filename))
		{
			$uploadsPath = Yii::getPathOfAlias('application.uploads');
			$filePath = $uploadsPath . DIRECTORY_SEPARATOR . $this->filename;
			if(!$validate || file_exists($filePath))
			{
				$path = $filePath;
			}
		}
		return $path;
	}
}