support str value

src/risotto/logger.py

@@ -64,10 +64,12 @@ class Logger:
             d = {}
             for key, value in row.items():
                 if key == 'data':
-                    if not value:
+                    if isinstance(value, dict):
+                        pass
+                    elif not value:
                         value = {}
-#                    else:
+                    else:
-#                        value = loads(value)
+                        value = loads(value)
                 elif key in ['start_date', 'stop_date']:
                     value = str(value)
                 d[key] = value