Traceback (most recent call last):
File "./front_api_test.py", line 14, in <module>
print(conv._raw_data())
File "/Users/james/src/oaf/oaf_stripe_report/vendor/py-front/front/models.py", line 78, in _raw_data
data, _ = schema.dump(self)
File "/Users/james/.virtualenvs/oaf_stripe_report/lib/python3.6/site-packages/marshmallow/schema.py", line 509, in dump
**kwargs
File "/Users/james/.virtualenvs/oaf_stripe_report/lib/python3.6/site-packages/marshmallow/marshalling.py", line 138, in serialize
index=(index if index_errors else None)
File "/Users/james/.virtualenvs/oaf_stripe_report/lib/python3.6/site-packages/marshmallow/marshalling.py", line 62, in call_and_store
value = getter_func(data)
File "/Users/james/.virtualenvs/oaf_stripe_report/lib/python3.6/site-packages/marshmallow/marshalling.py", line 132, in <lambda>
getter = lambda d: field_obj.serialize(attr_name, d, accessor=accessor)
File "/Users/james/.virtualenvs/oaf_stripe_report/lib/python3.6/site-packages/marshmallow/fields.py", line 252, in serialize
return self._serialize(value, attr, obj)
File "/Users/james/.virtualenvs/oaf_stripe_report/lib/python3.6/site-packages/marshmallow/fields.py", line 907, in _serialize
return format_func(value, localtime=self.localtime)