/**
* 查询某一个项
*
* @param string $query
* @param string $fields
* @return string
*/
public function findOne($query, $fields)
{
$query = $this->toArray($query);
if (!empty($fields)) {
$fields = $this->toArray($fields);
} else {
$fields = array();
}
$rst = $this->_model->findOne($query, $fields);
return $this->result($rst);
}
