IndexError: tuple index out of range with stripe_webhooks

[magedhelmy1]

When I create a user on the Django admin panel the following way, I get the following error

class CustomUser(AbstractUser):
    username = None
    email = models.EmailField(_('email address'), unique=True)
    name = models.CharField(verbose_name=_("first name"), max_length=50)
    stripe_customer_id = models.CharField(max_length=120)

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['name']

    objects = CustomUserManager()

    def __str__(self):
        return self.name


@receiver(post_save, sender=CustomUser)
def _on_update_user(sender, instance, created, **extra_fields):
    print(f"HERE {instance.is_superuser}")

    if created and not instance.is_superuser:

        # Create Stripe user
        customer = stripe.Customer.create(
            email=instance.email,
            name=instance.name,
        )
        
        User = get_user_model()

        # Create profile
        user = User.objects.get(id=instance.id)
        user.email = instance.email
        user.name=instance.name
        user.stripe_customer_id=customer.id

        user.save()

The error occurs when the following is running

stripe listen --forward-to 127.0.0.1:8000/stripe/webhook/

2022-06-17 13:07:51   --> customer.created [evt_1LBd1nCiNWlPNf1Rnx6rsetb]
2022-06-17 13:07:51  <--  [500] POST http://127.0.0.1:8000/stripe/webhook/ [evt_1LBd1nCiNWlPNf1Rnx6rsetb]

Here is the error I get

Traceback (most recent call last):
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/drf_stripe/stripe_webhooks/handler.py", line 53, in handle_webhook_event
    e = StripeEvent(event=event)
  File "pydantic/main.py", line 341, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 1 validation error for StripeEvent
event
  No match for discriminator 'type' and value 'customer.created' (allowed values: <EventType.CUSTOMER_SUBSCRIPTION_DELETED: 'customer.subscription.deleted'>, <EventType.CUSTOMER_SUBSCRIPTION_UPDATED: 'customer.subscription.updated'>, <EventType.CUSTOMER_SUBSCRIPTION_CREATED: 'customer.subscription.created'>, <EventType.INVOICE_PAID: 'invoice.paid'>, <EventType.INVOICE_CREATED: 'invoice.created'>, <EventType.INVOICE_PAYMENT_FAILED: 'invoice.payment_failed'>, <EventType.PRODUCT_UPDATED: 'product.updated'>, <EventType.PRODUCT_CREATED: 'product.created'>, <EventType.PRODUCT_DELETED: 'product.deleted'>, <EventType.PRICE_CREATED: 'price.created'>, <EventType.PRICE_UPDATED: 'price.updated'>, <EventType.PRICE_DELETED: 'price.deleted'>, <class 'str'>) (type=value_error.discriminated_union.invalid_discriminator; discriminator_key=type; discriminator_value=customer.created; allowed_values=<EventType.CUSTOMER_SUBSCRIPTION_DELETED: 'customer.subscription.deleted'>, <EventType.CUSTOMER_SUBSCRIPTION_UPDATED: 'customer.subscription.updated'>, <EventType.CUSTOMER_SUBSCRIPTION_CREATED: 'customer.subscription.created'>, <EventType.INVOICE_PAID: 'invoice.paid'>, <EventType.INVOICE_CREATED: 'invoice.created'>, <EventType.INVOICE_PAYMENT_FAILED: 'invoice.payment_failed'>, <EventType.PRODUCT_UPDATED: 'product.updated'>, <EventType.PRODUCT_CREATED: 'product.created'>, <EventType.PRODUCT_DELETED: 'product.deleted'>, <EventType.PRICE_CREATED: 'price.created'>, <EventType.PRICE_UPDATED: 'price.updated'>, <EventType.PRICE_DELETED: 'price.deleted'>, <class 'str'>)


During the handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/django/core/handlers/exception.py", line 47, in inner
    response = get_response(request)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/django/core/handlers/base.py", line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/django/views/generic/base.py", line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/rest_framework/views.py", line 509, in dispatch
    response = self.handle_exception(exc)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/rest_framework/views.py", line 469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/rest_framework/views.py", line 480, in raise_uncaught_exception
    raise exc
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/rest_framework/views.py", line 506, in dispatch
    response = handler(request, *args, **kwargs)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/drf_stripe/views.py", line 69, in post
    handle_stripe_webhook_request(request)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/drf_stripe/stripe_webhooks/handler.py", line 15, in handle_stripe_webhook_request
    handle_webhook_event(event)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/drf_stripe/stripe_webhooks/handler.py", line 55, in handle_webhook_event
    _handle_event_type_validation_error(err)
  File "/Users/magedhelmy/Desktop/VS_Code/licensingDemo4/.venv/lib/python3.10/site-packages/drf_stripe/stripe_webhooks/handler.py", line 41, in _handle_event_type_validation_error
    if error_loc[0] == 'event' and error_loc[1] == 'type':
IndexError: tuple index out of range

I do not understand the error and I am not sure how to proceed from here.

[oscarychen]

Hi @magedhelmy1, I think your Stripe web hook is configured to send more events than our package currently supports and thus you are seeing the error. The Stripe web hook events that are supported are listed here: https://github.com/oscarychen/drf-stripe-subscription#stripe-webhook

Essentially, your Stripe account is sending an event customer.created to your Django server, but this package currently only deals with the following events as outlined in the README:

product.created
product.updated
product.deleted
price.created
price.updated
price.deleted
customer.subscription.created
customer.subscription.updated
customer.subscription.deleted

Customer will be created and associated with a Django user whenever any of these events above references a customer that Django has not seen before, you do not need to explicitly send the web hook event from your Stripe account just for customer creation.