diff --git a/backend/app/students/models.py b/backend/app/students/models.py
index 91b5795..321506c 100644
--- a/backend/app/students/models.py
+++ b/backend/app/students/models.py
@@ -31,9 +31,8 @@ class Student(Person):
                                                                          order_by_last_name: str = None) -> BaseQuery:
         student_query = cls.query
 
-        if mode is None:
-            mode = True
-        student_query = student_query.filter_by(mode=mode)
+        if mode is not None:
+            student_query = student_query.filter_by(mode=mode)
 
         if fullname is not None:
             """This works only for sqlite3 database - concat function  doesn't exist so i used builtin concat