diff --git a/model/MongoModel.php b/model/MongoModel.php
index 6b050bb..8063862 100644
--- a/model/MongoModel.php
+++ b/model/MongoModel.php
@@ -28,6 +28,9 @@ abstract class MongoModel extends Model
         return $this->db->delete($this->table(), array('_id' => $id));
     }
 
+    /**
+     * @TODO: check for limits (if just one record needed)
+     */
     protected function fetchField($data, $params = array(), $field, $cache_key = null)
     {
         if (!$cache_key || !$result = $cache_key->get()) {
@@ -39,6 +42,9 @@ abstract class MongoModel extends Model
         return $result;
     }
 
+    /**
+     * @TODO: check for limits (if just one record needed)
+     */
     protected function fetch($data, $params = array(), $cache_key = null)
     {
         if (!$cache_key || !$result = $cache_key->get()) {