Question

Maybe it’s wrong but I always use this query for my app:

cme_only = Comput.all().filter('__key__ =', cid.key())

What is the compatible version of this query for NDB?
The Metadata queries are very different..

edit:
cid is an entity and cme_only is an iterable that I’m sure has only one value

cid = Comput.get_by_id(int(self.request.get('id')))
cme_only = Comput.all().filter('__key__ =', cid.key())

and then in template:

{{ for Comput in cme_only }}

I do not like it but it was enough

Answer 1

If cid is your entity then you could do that:

from google.appengine.ext import ndb
cme_only = ndb.Key(Comput, cid.key.id()).get()

But this will return you basically the same entity that you start with, the cid, But in general this is one way of querying by key.

You can check more on how to construct keys in the docs.