We discovered yesterday that when creating a Shopify webhook using the api, the specified webhook format is being ignored.
For example:
>>> hook = shopify.Webhook()
>>> hook.topic = 'products/update'
>>> hook.address = '<REDACTED>'
>>> hook.format = 'json'
>>> hook.save()
True
>>> shopify.Webhook.find()
[webhook(2302062)]
>>> shopify.Webhook.get(2302062)
{'format': 'xml', 'created_at': datetime.datetime(2012, 11, 29, 12, 30, 55, tzinfo=tzutc()), 'updated_at': datetime.datetime(2012, 11, 29, 12, 30, 55, tzinfo=tzutc()), 'topic': 'products/update', 'address': '<REDACTED>', 'id': 2302062}
In the example above we try to set the webhook format to 'json', but the webhook is created with a format of 'xml'
This has previously been working. Yesterday was the first occurrence we've seen of this problem.
Webhooks created through the web admin interface still correctly allow the format to be specified as json, however the web admin interface doesn't show any webhooks created through the api, nor vice-versa.