changed a lot regarding rec state, etc.

backend/models/model_base.py

@@ -0,0 +1,11 @@
+
+class ModelBase:
+    def get(self, attribute_name, default_value=None):
+        if hasattr(self, attribute_name):
+            return getattr(self, attribute_name)
+        elif False:  # a check for properties?
+            pass
+        elif default_value is not None:
+            return default_value
+        else:
+            raise KeyError("{} not found".format(attribute_name))