Question: fetch_page filters

[maininformer]

Hello. I am facing a problem that I cannot use certain filters with fetch_page, in particular this.

The code I am working with is using these filters. I can do these filterings on the application layer but I was really curious what the context is around this, does the datastore not support this anymore? is this an NDB only decision? and if possible, why was this decision made? Thank you.

[cguardia]

@plumSemPy Hi. Datastore does not support these operations natively, so ndb has to perform multiple queries for them. No cursor is available for fetch_page because of this, due to each of the multiple queries used having its own cursor.

See also this comment:

https://github.com/googleapis/python-ndb/blob/master/google/cloud/ndb/_datastore_query.py#L498

[chrisrossi]

Duplicate of #247

[maininformer]

Thank you.