René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Storing an Entity as an indexed property value always fails","articleBody":"From the [spec](https://github.com/GoogleCloudPlatform/google-cloud-datastore/blob/21e029b2657ebb15fef5429c90c4315326855fd1/proto/datastore_v1.proto#L142-L144):\n\n\u003e If a value is itself an entity, it cannot have `indexed` set to `true`.\n\nThis means when the `entity_value` is [added](https://github.com/GoogleCloudPlatform/gcloud-python/blob/0525530ad7a76e408ca2e842b883d49c353ed56d/gcloud/datastore/helpers.py#L245) we should set `indexed` to `False` on the property. (This is currently not easy, see #403, #404 and #512.)\n\nOr maybe we should just document that users need to add a property name to `exclude_from_indexes` if that property is an `Entity`.\n\n---\n\nTo replicate:\n\n``` python\n\u003e\u003e\u003e import os\n\u003e\u003e\u003e from gcloud import datastore\n\u003e\u003e\u003e from gcloud.datastore.entity import Entity\n\u003e\u003e\u003e from gcloud.datastore.key import Key\n\u003e\u003e\u003e \n\u003e\u003e\u003e datastore.set_default_connection()\n\u003e\u003e\u003e dataset_id = os.getenv('GCLOUD_TESTS_DATASET_ID')\n\u003e\u003e\u003e datastore.set_default_dataset_id(dataset_id)\n\u003e\u003e\u003e \n\u003e\u003e\u003e e = Entity(key=Key('Foo', 1))\n\u003e\u003e\u003e e2 = Entity(key=Key('Foo', 2))\n\u003e\u003e\u003e e['bar'] = e2\n\u003e\u003e\u003e e.save()\nTraceback (most recent call last):\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\n  File \"gcloud/datastore/entity.py\", line 144, in save\n    exclude_from_indexes=self.exclude_from_indexes)\n  File \"gcloud/datastore/connection.py\", line 495, in save_entity\n    result = self.commit(dataset_id, mutation)\n  File \"gcloud/datastore/connection.py\", line 376, in commit\n    datastore_pb.CommitResponse)\n  File \"gcloud/datastore/connection.py\", line 100, in _rpc\n    data=request_pb.SerializeToString())\n  File \"gcloud/datastore/connection.py\", line 77, in _request\n    raise six.moves.http_client.HTTPException(message)\nhttplib.HTTPException: Request failed with status code 400.\n                       Error was: Entity value is indexed.\n```\n\nand notice it doesn't fail if the property is correctly unindexed:\n\n``` python\n\u003e\u003e\u003e e = Entity(key=Key('Foo', 1), exclude_from_indexes=('bar',))\n\u003e\u003e\u003e e['bar'] = e2\n\u003e\u003e\u003e e.save()\n\u003e\u003e\u003e e.key.delete()\n```\n","author":{"url":"https://github.com/dhermes","@type":"Person","name":"dhermes"},"datePublished":"2015-01-09T18:50:09.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":8},"url":"https://github.com/529/google-cloud-python/issues/529"}