TypeError: argument of type 'NoneType' is not iterable (Direct charge on connected account)

Describe the bug

[11/Feb/2022 20:07:50] "GET /activity/6/ HTTP/1.1" 200 28154[11/Feb/2022 20:07:50] "GET /activity/6/ HTTP/1.1" 200 28154
Not Found: /media/users/e4808681-7aa4-46db-94bf-529c05cfb703-da7cf183cd34cfdea373b48d24e62787.jpg
[11/Feb/2022 20:07:50] "GET /media/users/e4808681-7aa4-46db-94bf-529c05cfb703-da7cf183cd34cfdea373b48d24e62787.jpg HTTP/1.1" 404 35258
> /home/you/workshop/Django/xdemo/clubs/club_dashboard.py(1284)post()
-> customer_obj, created = Customer.objects.get_or_create(new_customer, stripe_account=club.stripe_connect_trader_account_id)
(Pdb) Internal Server Error: /xdemo_stripe/webhook/
Traceback (most recent call last):
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/django/utils/decorators.py", line 43, in _wrapper
    return bound_method(*args, **kwargs)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/django/views/generic/base.py", line 98, in dispatch
    return handler(request, *args, **kwargs)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/views.py", line 36, in post
    trigger = WebhookEventTrigger.from_request(request)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/webhooks.py", line 217, in from_request
    raise e
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/webhooks.py", line 203, in from_request
    obj.process(save=False)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/webhooks.py", line 294, in process
    self.event = Event.process(self.json_body)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/core.py", line 1525, in process
    ret.invoke_webhook_handlers()
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/core.py", line 1537, in invoke_webhook_handlers
    webhooks.call_handlers(event=self)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/webhooks.py", line 98, in call_handlers
    handler_func(event=event)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/event_handlers.py", line 73, in customer_webhook_handler
    if event.customer and target_object_type == "customer":
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/core.py", line 1567, in customer
    return Customer._get_or_retrieve(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 988, in _get_or_retrieve
    instance = cls.sync_from_stripe_data(data)
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 946, in sync_from_stripe_data
    instance, created = cls._get_or_create_from_stripe_object(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 704, in _get_or_create_from_stripe_object
    cls._create_from_stripe_object(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 574, in _create_from_stripe_object
    stripe_data = cls._stripe_object_to_record(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 356, in _stripe_object_to_record
    field_data, skip, is_nulled = cls._stripe_object_field_to_foreign_key(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 469, in _stripe_object_field_to_foreign_key
    field_data, _ = field.related_model._get_or_create_from_stripe_object(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/payment_methods.py", line 123, in _get_or_create_from_stripe_object
    source_cls._get_or_create_from_stripe_object(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 704, in _get_or_create_from_stripe_object
    cls._create_from_stripe_object(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 574, in _create_from_stripe_object
    stripe_data = cls._stripe_object_to_record(
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 321, in _stripe_object_to_record
    if not cls.is_valid_object(data):
  File "/home/you/workshop/Django/xdemo/venv/lib/python3.8/site-packages/djstripe/models/base.py", line 493, in is_valid_object
    return "object" in data and data["object"] == cls.stripe_class.OBJECT_NAME
TypeError: argument of type 'NoneType' is not iterable

To Reproduce I was getting “Application fee” issue on

1. Upgraded djstripe from 2.5.0 to 2.6.1 because I was getting application_fee errors on webhook.
2. Run the below code

token = stripe.Token.create(
    customer=request.user.stripe_customer_id,
    stripe_account=stripe_account,
)

customer = stripe.Customer.create(
    name=request.user.email,
    email=request.user.email,
    source=token.id,
    stripe_account=stripe_account,
)

payment_intent = stripe.PaymentIntent.create(
    amount=int(price * 100),
    currency='GBP',
    customer=customer.id,
    payment_method=customer.default_source,
    payment_method_types=['card'],
    application_fee_amount=int(price * 100 * settings.STRIPE_APPLICATION_FEE_PERCENTAGE),
    stripe_account=f'{stripe_account}',
)

Environment

• dj-stripe version: [2.6.1]
• Database: [postgres 12]
• Python version: [e.g. 3.8.10]
• Django version: [e.g. 3.2.5]

[arnav13081994]

@janbaykara you could write your own webhook handler to handle such webhook connect events.

[janbaykara]

What can be done as a workaround for now?