Merge pull request #1184 from dpetzel/nullbooleanfield_fix

Fix infered field type for models.NullBooleanField

rest_framework/serializers.py

@@ -619,6 +619,7 @@ class ModelSerializer(Serializer):
         models.TextField: CharField,
         models.CommaSeparatedIntegerField: CharField,
         models.BooleanField: BooleanField,
+        models.NullBooleanField: BooleanField,
         models.FileField: FileField,
         models.ImageField: ImageField,
     }