UUID is not JSON Serializable

[Sergei G]

I am trying to get cartridge-payments to work.

Exception Type: TypeError at /shop/checkout/

Exception Value: UUID('ab07bbb9-78ff-45dd-a670-251bb3c65163') is not JSON serializable

Django: 1.6.5

Python: 2.7.6

Traceback:

File "lib/python2.7/site-packages/django/core/handlers/base.py" in get_response

  199.                 response = middleware_method(request, response)

File "lib/python2.7/site-packages/django/contrib/sessions/middleware.py" in process_response

  38.                     request.session.save()

File "lib/python2.7/site-packages/django/contrib/sessions/backends/db.py" in save

  57.             session_data=self.encode(self._get_session(no_load=must_create)),

File "lib/python2.7/site-packages/django/contrib/sessions/backends/base.py" in encode

  87.         serialized = self.serializer().dumps(session_dict)

File "lib/python2.7/site-packages/django/core/signing.py" in dumps

  88.         return json.dumps(obj, separators=(',', ':')).encode('latin-1')

File "/usr/local/lib/python2.7/json/__init__.py" in dumps

  250.         sort_keys=sort_keys, **kw).encode(obj)

File "/usr/local/lib/python2.7/json/encoder.py" in encode

  207.         chunks = self.iterencode(o, _one_shot=True)

File "/usr/local/lib/python2.7/json/encoder.py" in iterencode

  270.         return _iterencode(o, 0)

File "/usr/local/lib/python2.7/json/encoder.py" in default

  184.         raise TypeError(repr(o) + " is not JSON serializable")

Exception Type: TypeError at /shop/checkout/

Exception Value: UUID('ab07bbb9-78ff-45dd-a670-251bb3c65163') is not JSON serializable

[Sergei G]

After some research my conclusion is that UUID object serialization is not supported by default json encoder/decoder. I think the solution would be to implement UUID serialization for session and set new serializer with settings.SESSION_SERIALER...  UUID.urn form looks most reasonable for uuid detection during decoding.

I just realized that cartridge-payments targets multiple payment models and I don't need that. Thus I think can ignore the issue for now and look for direct paypal integration instead.

[Stephen McDonald]

Rather than ignoring it why don't you send a pull request with a fix - you could just convert the UUID to/from a string before it goes in and out of the session, it's probably a two line change :-)

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Stephen McDonald
http://jupo.org