Don't serialize None to json, so we can use SQL is not null predicate.

getredash · Jan 13, 2019 · 55cf97e · 55cf97e
1 parent 8e99194
commit 55cf97e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/redash/models/types.py b/redash/models/types.py
@@ -24,6 +24,9 @@ class PseudoJSON(TypeDecorator):
     impl = db.Text
 
     def process_bind_param(self, value, dialect):
+        if value is None:
+            return value
+
         return json_dumps(value)
 
     def process_result_value(self, value, dialect):