CODEWITHSUNDEEP
pythongoogle-app-engineapp-engine-ndb
Tiago Freire
Tiago Freire

Reputation: 33

ndb Getting Key validation error on StringProperty

I am having a weird message error.

I have a model with a StringProperty called checksum, but when I try to save to it, I get a validation error claiming that a Key value was expected.

EDIT: to avoid potential issues i renamed the id property to gdid, as it is displayed now, and the error persists. 

class gd_file(base_class):
    """Google Drive File Reference"""
    gdid = ndb.StringProperty()
    #creation_date = ndb.DateTimeProperty()
    #modification_date = ndb.DateTimeProperty()
    name = ndb.StringProperty()
    checksum = ndb.StringProperty()
    size = ndb.IntegerProperty()
    office = ndb.KeyProperty()
    parents = ndb.KeyProperty()

sample code:

            logging.info('GD_FILE:')
            for p in gd_file._properties:
                logging.info( getattr(gd_file,p))

            logging.info('m:')
            logging.info(type(m))
            logging.info(m)

            fd = gd_file(
                parents = parents_list,
                owners = gd['ownerNames'],
                last_changed_by = gd['lastModifyingUserName'],
                creation_date = datetime.datetime.strptime(cdate, '%Y-%m-%d %H:%M:%S.%f'),
                modification_date = datetime.datetime.strptime(mdate, '%Y-%m-%d %H:%M:%S.%f'),
                gdid = gd['id'],
                name = result['name'],
                size = result['size'],
                type = gd['mimeType'],
                checksum = m
            )

Line 231 in my code is where I attribute checksum = m above.

Log including error:

INFO     2014-02-20 21:20:09,042 proterrahandler.py:213] GD_FILE:

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] KeyProperty('parents')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] StringProperty('checksum')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] StringProperty('owners', repeated=True)

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] DateTimeProperty('creation_date', auto_now_add=True)

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] StringProperty('type')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] StringProperty('last_changed_by')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] StringProperty('name')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] IntegerProperty('size')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] DateTimeProperty('modification_date', auto_now=True)

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] KeyProperty('cid')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] KeyProperty('office')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:215] StringProperty('id')

INFO     2014-02-20 21:20:09,042 proterrahandler.py:217] m:

INFO     2014-02-20 21:20:09,042 proterrahandler.py:218] <type 'str'>

INFO     2014-02-20 21:20:09,042 proterrahandler.py:219] 019f8998e5896bb34ecdbb0803343486

ERROR    2014-02-20 21:20:09,046 webapp2.py:1552] Expected Key, got [u'0B2PeVr8B69LER2ZGWVNjM29TSTQ']

Traceback (most recent call last):

  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1535, in __call__

    rv = self.handle_exception(request, response, e)

  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1529, in __call__

    rv = self.router.dispatch(request, response)

  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1278, in default_dispatcher

    return route.handler_adapter(request, response)

  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 1102, in __call__

    return handler.dispatch()

  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 572, in dispatch

    return self.handle_exception(e, self.app.debug)

  File "C:\Program Files (x86)\Google\google_appengine\lib\webapp2-2.5.2\webapp2.py", line 570, in dispatch

    return method(*args, **kwargs)

  File "C:\Users\Tiago\Google Drive\Development\gae\cert-id-tinkerbox\proterrahandler.py", line 89, in post

    files = self.handle_upload()

  File "C:\Users\Tiago\Google Drive\Development\gae\cert-id-tinkerbox\proterrahandler.py", line 231, in handle_upload

    checksum = m

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 2852, in __init__

    self._set_attributes(kwds)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 3587, in _set_attributes

    setattr(self, name, value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 3605, in __setattr__

    return super(Expando, self).__setattr__(name, value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 1343, in __set__

    self._set_value(entity, value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 1088, in _set_value

    value = self._do_validate(value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 1035, in _do_validate

    value = self._call_shallow_validation(value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 1227, in _call_shallow_validation

    return call(value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 1274, in call

    newvalue = method(self, value)

  File "C:\Program Files (x86)\Google\google_appengine\google\appengine\ext\ndb\model.py", line 1927, in _validate

    raise datastore_errors.BadValueError('Expected Key, got %r' % (value,))

BadValueError: Expected Key, got [u'0B2PeVr8B69LER2ZGWVNjM29TSTQ']

INFO     2014-02-20 18:20:09,193 module.py:612] default: "POST /app/proterra/checklist/import HTTP/1.1" 500 3357

I am a bit stumped on this one, I have no idea where the Key error is being raised.

Any ideas?

Upvotes: 0

Views: 974

Answers (1)

Tim Hoffman
Tim Hoffman

Reputation: 12986

You can't have a property called id

It is a argument supplied to the constructor which is used in creating a Key with a supplied id.

Have a read of the ndb.Model docs https://developers.google.com/appengine/docs/python/ndb/modelclass#Constructor

Upvotes: 1

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