@@ -24,7 +24,7 @@ class EmFieldType(MultiValueFieldType):
return (value, None)
if isinstance(value, dict):
for val in value.values():
- if not isinstance(val, str):
+ if not(isinstance(val, str) or val is None) :
return (None, ValueError("Expected str as dict values. Bad dict : '%s'" % value))
if isinstance(value, str):