[hotfix] table view not group by without orderby fails

superset/config.py

@@ -247,6 +247,7 @@ JINJA_CONTEXT_ADDONS = {}
 
 try:
     from superset_config import *  # noqa
+    print('Loaded your LOCAL configuration')
 except ImportError:
     pass
 

superset/viz.py

@@ -441,7 +441,8 @@ class TableViz(BaseViz):
         if fd.get('all_columns'):
             d['columns'] = fd.get('all_columns')
             d['groupby'] = []
-            d['orderby'] = [json.loads(t) for t in fd.get('order_by_cols', [])]
+            order_by_cols = fd.get('order_by_cols', []) or []
+            d['orderby'] = [json.loads(t) for t in order_by_cols]
         return d
 
     def get_df(self, query_obj=None):