diff --git a/src/Controller/Component.php b/src/Controller/Component.php
index 77a742a..85f54f2 100644
--- a/src/Controller/Component.php
+++ b/src/Controller/Component.php
@@ -206,8 +206,10 @@ class Component
 
     /**
      * Создает модель
-     * @param class-string $modelName
-     * @return mixed
+     *
+     * @template T
+     * @param class-string<T> $modelName
+     * @return T
      */
     public function getModel($modelName)
     {
diff --git a/src/Database/IdGenerator.php b/src/Database/IdGenerator.php
index 4cd3d3d..6cad31a 100644
--- a/src/Database/IdGenerator.php
+++ b/src/Database/IdGenerator.php
@@ -35,6 +35,9 @@ class IdGenerator {
         } else {
             $result = $this->db->fetchOneArray("SELECT last_insert_rowid() AS nextval");
         }
+        if (!$result) {
+            throw new \Exception("nextval failed");
+        }
         return (int)$result['nextval'];
     }
 }