fixed (circumvented) bug related to hybrid_property and parameter serialization

models/recorder_model.py

@@ -98,11 +98,10 @@ class RecorderCommand(db.Model):
     def get_all():
         return RecorderCommand.query.all()
 
-    @hybrid_property
+    @property
     def parameters(self):
         if self.parameters_string is None:
-            return []
-        print(self.parameters_string)
+            return None
         return json.loads(self.parameters_string)
 
     @parameters.setter