code to call recorder functions from frointend

backend/tools/model_updater.py

@@ -67,12 +67,14 @@ def update_recorder_models_database(drop: bool = False):
         db.session.commit()
     r_as = get_defined_recorder_adapters()
     for r_a in r_as:
+        if r_a.get('class') is None:  # skip modules without class (helpers.py, e.g.)
+            continue
         try:
             r_m = RecorderModel.get_by_adapter_id(r_a["id"])
             model_checksum = calculate_md5_checksum(dumps(r_a["commands"]))
             if r_m is None:
                 r_m = RecorderModel(record_adapter_id=r_a["id"], model_name=r_a["name"], checksum=model_checksum,
-                                    **r_a.get('class', {}).get_recorder_params())
+                                    **r_a.get('class').get_recorder_params())
                 db.session.add(r_m)
                 db.session.flush()
                 db.session.refresh(r_m)