pformat() SQL params to avoid errors because of unhashable types

Refs #1091

Author: matthiask

debug_toolbar/panels/sql/panel.py

@@ -3,6 +3,7 @@
 import uuid
 from collections import defaultdict
 from copy import copy
+from pprint import pformat
 
 from django.conf.urls import url
 from django.db import connections
@@ -150,7 +151,7 @@ def similar_key(query):
 
         def duplicate_key(query):
             raw_params = () if query['raw_params'] is None else tuple(query['raw_params'])
-            return (query['raw_sql'], raw_params)
+            return (query['raw_sql'], pformat(raw_params))
 
         if self._queries:
             width_ratio_tally = 0