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Datastore.Client.Query.fetch().next_page() always return has_next = False #2205

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@getumen
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Using

gcloud==0.18.1

fetch().has_next() doesn't work.
It always returns False.

from gcloud import datastore

if __name__ == '__main__':
    ds = datastore.Client('project-id')

    has_next = True
    cursor = None

    for i in range(10):
        query = ds.query(kind='Item')
        query.keys_only()
        entity, has_next, cursor = query.fetch(start_cursor=cursor, limit=1).next_page()
        print(entity, has_next)

The result is following:

[<Entity[{'kind': 'Item', 'id': 1}] {}>] False
[<Entity[{'kind': 'Item', 'id': 2}] {}>] False
[<Entity[{'kind': 'Item', 'id': 3}] {}>] False
[<Entity[{'kind': 'Item', 'id': 4}] {}>] False
[<Entity[{'kind': 'Item', 'id': 5}] {}>] False
[<Entity[{'kind': 'Item', 'id': 6}] {}>] False
[<Entity[{'kind': 'Item', 'id': 7}] {}>] False
[<Entity[{'kind': 'Item', 'id': 8}] {}>] False
[<Entity[{'kind': 'Item', 'id': 9}] {}>] False
[<Entity[{'kind': 'Item', 'id': 10}] {}>] False

There are next entities. But has_next() returns False.
This issue occurs since about 4 hours ago.

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api: datastoreIssues related to the Datastore API.Issues related to the Datastore API.

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