diff --git a/app/Services/TG/Hook/Dog.php b/app/Services/TG/Hook/Dog.php
index eeaeaae4..6b46ac53 100644
--- a/app/Services/TG/Hook/Dog.php
+++ b/app/Services/TG/Hook/Dog.php
@@ -270,6 +270,11 @@ class Dog extends Mod\Base {
     }
     
     private function subStr($input) {
+        
+        if (!$input) {
+            return "";
+        }
+        
         if (mb_strlen($input, 'UTF-8') > (int) $this->iStrMaxLen) {
             
             return mb_substr($input, 0, (int) $this->iStrMaxLen, 'UTF-8')."……";
@@ -322,9 +327,7 @@ class Dog extends Mod\Base {
         $sValue = $aParam["aArg"][1] ?? false;
         
         if ($sValue == "?") {
-
             return "#add__{field} {value}";
-
         }
         
         if (!$sValue) {
@@ -339,6 +342,7 @@ class Dog extends Mod\Base {
         
         $this->oModelSelf->save();
         
+        $aParam = [];
         $aParam["aOption"][1] = $this->sPrimaryKey;
         $aParam["aArg"][1] = $this->oModelSelf->{$this->sPrimaryKey};