Merge pull request #717 from MilanPecov/add-support-for-timezone-field

add support for working with pytz object field

src/drf_yasg/utils.py

@@ -5,6 +5,7 @@
 from collections import OrderedDict
 from decimal import Decimal
 
+import pytz
 from django.db import models
 from django.utils.encoding import force_str
 from rest_framework import serializers, status
@@ -465,6 +466,9 @@ def field_value_to_representation(field, value):
         else:
             value = str(value)
 
+    if isinstance(value, pytz.BaseTzInfo):
+        value = str(value)
+
     # JSON roundtrip ensures that the value is valid JSON;
     # for example, sets and tuples get transformed into lists
     return json.loads(json.dumps(value, cls=encoders.JSONEncoder))