app-engine-ndb

问题 How to use this solution https://stackoverflow.com/a/10067749/604240 in jinja 2 template? 回答1: I agree my question was due to lack of knowledge than problem. Eventually I figured it out how to achieve it. Basically I didn't know how to link loop from python code to query so it's available to Jinja2 template. Although correct solution might be to use map() with callback function https://developers.google.com/appengine/docs/python/ndb/queryclass#Query_map but I am using temporary solution which

问题 I've this table class ClubMembership(GCModel): member = ndb.KeyProperty(kind='User', required=True) club = ndb.KeyProperty(kind='Club', required=True) is_active = ndb.BooleanProperty(default=True) membership_type = ndb.StringProperty(choices=set(["MEMBER", "TRAINER", "OWNER"]), default="MEMBER", required=True) Then in the Table Club i've this class Club(GCModel): @property def members(self): return ClubMembership.query(ndb.AND(ClubMembership.club == self.key, ClubMembership.membership_type ==

问题 I am having a problem with appengine that I can't seem to figure out: from google.appengine.ext import ndb from google.appengine.ext.ndb import polymodel class Item(polymodel.PolyModel): name = ndb.StringProperty() type = ndb.StringProperty(choices=["Medical","Food"]) sub_category_type = ndb.StringProperty() sub_category_sub_type = ndb.StringProperty() class MedicalItem(Item): med_sub_type = ndb.StringProperty() can_split_item = ndb.BooleanProperty() class ItemInHouse(ndb.Model): item = ndb

问题 I am hoping to modify 1000 entities using task queue, as suggested Zig Mandel in my original question here: Google App Engine: Modifying 1000 entities I have a UserAccount kind like this: class UserAccount(ndb.Model): email = ndb.StringProperty() Some of the UserAccount email s contain uppercases (example: JohnathanDough@email.com), and I would like to apply email.lower() to every entity's email. So I've set up a task queue like this: class LowerEmailQueue(BaseHandler): def get(self): all

问题 I have a custom ndb property subclass which should parse an empty string to None. When I return None in the _validate function, the None value is ignored and the empty string is still used. Can I somehow cast input values to None? class BooleanProperty(ndb.BooleanProperty): def _validate(self, value): v = unicode(value).lower() # '' should be casted to None somehow. if v == '': return None if v in ['1', 't', 'true', 'y', 'yes']: return True if v in ['0', 'f', 'false', 'n', 'no']: return False

问题 Is it the closest or the most distant parent relative of the entity being written, which determines the entity group? ( Question 1 ) For, if I have, two simultaneous requests to write two different entities, in this example, both having immediate parent the Data entity (with key '2'), and having subsequent ancestors of: Person:9 > Collection:3 > Script:4 > Data:2 > Record of Tom Cruise Person:9 > Collection:3 > Script:4 > Data:2 > Record of Shia La Boef In either case they both belong to the

问题 I am doing Udacity's Web Dev Course with Google Appengine and Python. I would like to know how I could assign to a created entity, its own author . For example, I have two ndb.Models kinds: class User(ndb.Model): username = ndb.StringProperty(required = True) bio = ndb.TextProperty(required = True) password = ndb.StringProperty(required = True) email = ndb.StringProperty() created = ndb.DateTimeProperty(auto_now_add = True) class Blog(ndb.Model): title = ndb.StringProperty(required = True)

问题 I'm working on a lightweight app, and I have quite a few situations where the user submits a form, the form data is processed and pushed to the datastore, and then the user is redirected to a page that displays some of the same data. It's quite often the case that the user gets to the page before the datastore has been updated, so they see old data. Is there any way to have the app wait for the datastore to update before proceeding? The obvious hacky solution is calling sleep(1) , but that's

问题 I'm managing an API with using Google Cloud Endpoints and am struggling with a strange, randomly happening, error. The error happens in production only, the unit tests pass property. I have the following model: class UserFacebookData(ndb.Model): facebook_id = ndb.StringProperty(required=True, indexed=True) facebook_token = ndb.StringProperty(required=True, indexed=True) class User(ndb.Model, Entity): created = ndb.DateTimeProperty(auto_now_add=True, indexed=True) username = ndb.StringProperty

问题 I created a utility to exchange or zip all the entities for a kind. But how can I find out if the model_class used is a db.Model or an ndb.Model? def _encode_entity(self, entity): if self.ndb : entity_dict = entity.to_dict() self.entity_eid = entity.key.id() entity_dict['NDB'] = True else : entity_dict = db.to_dict(entity) self.entity_eid = entity.key().name() entity_dict['NDB'] = False .... Now I use : def queryKind(self): try : self.query = self.model_class.query() self.ndb = True except