René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Key id / name should fail if set to 0 / ''","articleBody":"In [`Key.id()`](https://github.com/GoogleCloudPlatform/gcloud-python/blob/8a6feffb5381a7d738c8ecfd0e4d85efd4564dfe/gcloud/datastore/key.py#L188), the check\n\n``` python\n    def id(self, id_to_set=None):\n        ...\n        if id_to_set:\n            clone = self._clone()\n```\n\nalso ignores `False`-y objects other than `None`.\n\nThis means it ignores the integer `0`, which would seem to be a valid ID. However, the backend actually rejects this, so maybe this bug only requires fixing the docstring?\n\n``` python\n\u003e\u003e\u003e from gcloud import datastore\n\u003e\u003e\u003e cnxn = datastore.get_connection()\n\u003e\u003e\u003e import os\n\u003e\u003e\u003e dataset = cnxn.dataset(os.getenv('GCLOUD_TESTS_DATASET_ID'))\n\u003e\u003e\u003e entity = dataset.entity('foo')\n\u003e\u003e\u003e entity.key()._path\n[{'kind': 'foo'}]\n\u003e\u003e\u003e entity.key()._path[0]['id'] = 0\n\u003e\u003e\u003e entity\n\u003cEntity[{'kind': 'foo', 'id': 0}] {}\u003e\n\u003e\u003e\u003e entity['bar'] = u'baz'\n\u003e\u003e\u003e entity.save()\nTraceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n  File \"gcloud/datastore/entity.py\", line 246, in save\n    exclude_from_indexes=self.exclude_from_indexes())\n  File \"gcloud/datastore/connection.py\", line 477, in save_entity\n    result = self.commit(dataset_id, mutation)\n  File \"gcloud/datastore/connection.py\", line 377, in commit\n    datastore_pb.CommitResponse)\n  File \"gcloud/datastore/connection.py\", line 95, in _rpc\n    data=request_pb.SerializeToString())\n  File \"gcloud/datastore/connection.py\", line 73, in _request\n    raise Exception('Request failed. Error was: %s' % content)\nException: Request failed. Error was: Key path id is invalid. Must not be zero.\n```\n\n/cc @pcostell \n","author":{"url":"https://github.com/dhermes","@type":"Person","name":"dhermes"},"datePublished":"2014-12-18T22:29:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/443/google-cloud-python/issues/443"}