跨域bug修复2

backend/models/attendance.py

@@ -36,7 +36,6 @@ class AttendanceModel:
     
     @staticmethod
     async def get_class_records(
-        class_id: int,
         date: str = None,
         student_id: int = None
     ) -> List[Dict[str, Any]]:
@@ -44,9 +43,9 @@ class AttendanceModel:
             SELECT ar.*, s.name as student_name, s.student_no
             FROM attendance_records ar
             JOIN students s ON ar.student_id = s.student_id
-            WHERE s.class_id = %s
+            WHERE 1=1
         """
-        params = [class_id]
+        params = []
         
         if date:
             sql += " AND ar.date = %s"