NDB: https://developers.google.com/appengine/docs/python/ndb/

This would be very useful. I was just thinking of migrating my app ti use ndb.

https://docs.google.com/document/d/1AefylbadN456_Z7BZOpZEXDq8cR8LYu7QgI7bt5V0Iw/
edit?pli=1

I agree that it is very useful, I used information from that table to migrate 
my own application and also create NDB DAL for web2py which I finally selected 
instead of appengine-rest-server

Maybe you could make it configurable. So you can choose db or ndb.

Your example page (and other issues here) suggest using this with the AppEngine 
Guestbook example project; however, as of 23 Oct 2013, that project uses ndb 
instead of db, and so appengine-rest-server does NOT work "out of the box" with 
that project. One must go into their guestboook.py and change ndb to db, which 
is 1) not obvious to newbs like myself, and 2) loses functionality of ndb?

Actually, you can't just change ndb to db; you have to change the query setup 
and other things as well. I was able to get this working only because I copied 
the example code in issue 51...

Can appengine endpoints serve as a replacement? Anyway, found it easy to create 
a rest server for ndb ... here's one modeled for ember.js 
https://github.com/kelonye/gae-ember-rest