I have a POST method which calls a few tasklets. These tasklets do have yields in them, and I do have some x.put_async() in my code. So I don't want it to return before all the async stuff is done....

based on this docs https://developers.google.com/appengine/docs/python/ndb/entities#deleting_entities well, im still not sure why i cannot do the delete on NDB: def get(self): id = self.request....

I would like to create movies database, where user will be able to mark movies he/she watched and liked: class Movies(ndb.Model): watched = ndb.UserProperty() liked = ndb.UserProperty() Will t...

Is there an efficient mechanism for querying by the number of items in a repeated property in NDB? I'd like to do something like: Class.query(class.repeated_property.count == 2) but of course t...

I am using NDB with python 2.7 with threadsafe mode turned on. I understand that querying for entities with NDB does not use local cache or memcache but goes straight to the datastore unlike getti...

My question is, what is the best way to create a new model entity, and then read it immediately after. For example, class LeftModel(ndb.Model): name = ndb.StringProperty(default = "John") date =...

suppose I have this code: class A(ndb.Model): prop = ndb.StringProperty(verbose_name="Something") m = A() m.prop = "a string value" Now of course if I print m.prop, it will output "a string va...

I have read this question and the simple and clear answer but it's not useful in my case because the answer don't consider the nested for. please, see the code: class SuperCat(ndb.Model): class C...

I am looking around in order to get an answer what is the max limit of results I can have from a GQL query on Ndb on Google AppEngine. I am using an implementation with cursors but it will be much ...

I'm in the process of writing my first RESTful web service atop GAE and the Python 2.7 runtime; I've started out using Guido's shiny new ndb API. However, I'm unsure how to solve a particular case...

I'm trying to create an ndb model where each record has an unique field "name". I would like to define this field as the key_name field and use it to look up the records. Do I have to include a nam...

How do I get the equivalent result of the following query in NDB? Entity.all(keys_only=True).fetch(20) I know you can pass 'keys_only=True' to the iter() method. But what if I want to perform a ...

in my app i have a few batch operations i perform. unfortunately this sometimes takes forever to update 400-500 entities. what i have is all the entity keys, i need to get them, update a property a...

My question is very fundamental, I want to know straight forward and right way to access attribute values of parent entity from a child in App Engine Python. For example I have following model sche...

With the recent release of NDB, is there any reason to keep using the old datastore API? I'm working on an application that currently uses the old datastore API, and I have put quite some effort i...

Taken from the Python NDB Overview: When the application reads an entity, that entity is automatically cached; this gives fast (and inexpensive) reads for frequently-read entities. ... The NDB fun...

Is there an equivalent for modelname_set (a back-referenced property) in Google App Engine's NDB? In the old DB a Model entity had described the back-reference property as: The name of the back...