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• Add persistent field to an App Engine Datastore class?

  - by Joren

  So if I have a class of which I have a number saved in a datastore, and then seek to add a field later, how can I prevent all my previous objects breaking? Is there a way to retroactively set those fields so they're not null?

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• how to validate form data using google-app-engine..

  - by zjm1126

  i have no idea about this. thanks

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• Google App Engine - Document Editor Creation/Tap Into Google Docs?

  - by Josh Patton

  What is the best way to create a custom document editor in GAE? I'm making a website meant for a School Robotics Club (With support for any other organization - DRY). We currently use Google services for online collaboration, I'm wondering if there is a way to tap into Google Docs and allow users to edit a Google Document without using Google Accounts or the Google Doc interface. If that is not possible (I've researched and I don't think it is), what is the best way to make a document editor? I want it completely on the website I'm creating, so I'm assuming just some javascript editor like TinyMCE + Ajax + Datastore. Is their anything that replicates Google Doc's/Microsoft Offices's/OpenOffice.org's feature set as far as fonts, spacing, alignment, justification, etc.?

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• How to get all the descendants of a given instance of a model in google app engine?

  - by M.A. Cape

  Using parent child relationship where a parent can have children while each child has only one parent, does using Children.all().ancestor(parent.key) a good solution where a child is constructed by setting parent=parent.key in the constructor? Is the 1000 limit applies with this kind of query?

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• how to setup ssl module for google-app-engine..

  - by zjm1126

  i floow this step by step: http://beautifulisbetterthanugly.com/posts/2009/aug/19/compile-ssl-115-python-25-or-lower/ but not successful ,and this is my error: how do do this , thanks

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• has any 'groups or tribes' code (open source) on google-app-engine.

  - by zjm1126

  i want to look look thanks

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• Where do I attach the StoreKit delegate and observer in a Cocos2d App?

  - by Jeff B

  I have figured out how all of the StoreKit stuff works and have actually tested working code... however, I have a problem. I made my "store" layer/scene the SKProductsRequestDelegate. Is this the correct thing to do? I get the initial product info like so: SKProductsRequest *productRequest = [[SKProductsRequest alloc] initWithProductIdentifiers: productIDs]; [productRequest setDelegate: self]; [productRequest start]; The problem is that if I transition to a new scene when a request is in progress, the current layer is retained by the productRequest. This means that touches on my new scene/layer are handled by both the new layer and the old layer. I could cancel the productRequest when leaving the scene, but: I do not know if it is in progress at that point. I cannot release it because it may or may not have been released by the request delegates. There has got to be a better way to do this. I could make the delegate a class external to the current layer, but then I do not know how to easily update the layer with the product information when the handler is called.

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• How can I load a property lazily in JDO (on Google App Engine)?

  - by luciano

  I have this code in one of my @PersistenceCapable classes: @Persistent private Blob data; The Blob can be quite big, so I'd like to load it lazily since most of the times I don't need it. How can I annotate that property to avoid immediate loading? I could create another class that contains the Blob alone and then use a lazy one-to-one, but I'd like to solve this with annotations.

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• What does ancestor mean in the google app engine datastore.

  - by M.A. Cape

  Can anyone tell or define more what is "ancestor" and give an example on it and also what it is for? I just can't grasp what it really is. Reference: http://code.google.com/appengine/docs/python/datastore/queryclass.html#Query_ancestor Thanks.

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• Is is possible to get an email attachment into App Engine's Blobstore?

  - by Tomás Flannery

  I've managed to get email attachments onto Amazon S3 from a GAE incoming email, but does anyone know a technique to get an attachment, like an image, into the blobstore. Any help would be much appreciated.

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• What are the restrictions for the name of an application when submitting to App Store ?

  - by Patrick

  Hello, I have just finished my application for iPhone. I would like to know if it is possible to use the word iPhone in the name of the application. For example, can I name my application iPhonesque ? And for the icon, can I use graphics related to Apple like a Mac Windows (with the three buttons, red, yellow and green) on snow leopard background ? Thank you very much for your answers.

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• how do i download the source code of a google app engine project?

  - by asdasd

  this seems like it should be very easy but i dont see a link to it anywhere

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• Force a delay on Ajax responses when using the App Engine eclipse plugin?

  - by Joren

  I'd like to increase the time it takes the ajax to return in order to test various animations. By default it takes ~3-5ms. Is there a way to force a delay? I'm using java.

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• How to use HTTP method DELETE on Google App Engine?

  - by Jader Dias

  I can use this verb in the Python Windows SDK. But not in production. Why? What am I doing wrong? The error message includes (only seen via firebug or fiddler) Malformed request or something like that My code looks like: from google.appengine.ext import db from google.appengine.ext import webapp class Handler(webapp.RequestHandler): def delete(self): key = self.request.get('key') item = db.get(key) item.delete() self.response.out.write(key)

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• How can I validate form data using Google App Engine?

  - by zjm1126

  I have no idea about this.

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• how to make site show different language(chinese and english) on google-app-engine.

  - by zjm1126

  if you using django ,you can use the "LC_MESSAGES --django.po" but has any way to do this on gae ? and how to .. thanks and if i only want to use django's this features, how can i import it?

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• how to enable a method in tamplate of google-app-engine..

  - by zjm1126

  the mothed is : def printa(x): return x the reponse is : self.response.out.write(template.render(path, {'printa':printa})) the html is : {{ printa 'sss'}} i want to show 'sss' in my page , so how to do this , thanks

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• what is useful of os.environ in google-app-engine , why google use os.environ so many times.

  - by zjm1126

  why google use so many os.environ .. thanks

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• google app engine: go to login page by javascript?

  - by user342284

  Do anyone know how do use javascript to redirect user login using Google Accounts? I know there is "users.create_login_url(self.request.path)" but how do that integrated to "`window.location" Or there is alternative??

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• Ember-App-Kit: How to execute code only in release mode?

  - by Dominik Schmidt

  I have created an error handler as described here: http://emberjs.com/guides/understanding-ember/debugging/#toc_implement-a-code-ember-onerror-code-hook-to-log-all-errors-in-production But this code is not only executed in production mode but also in normal debug builds which floods my server logs. I know that Ember.debug() calls and alike are being filtered out for production builds, but I couldn't find out where/how that is implemented and if that same mechanism could be used to make my code only fire in production code.

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• Google app engine How to count SUM from datestore?

  - by Alon

  Hey, Im wondering, how can i get a SUM of a rating entity i get from the datastore (python)? should i: ratingsum = 0 for rating in ratings: ratingsum + rating print ratingsum ?

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• where is the data store when i using google-app-engine on localhost..

  - by zjm1126

  i want to find the data on my disk thanks

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• Can Google App Engine ever support SSL with custom domains (i.e. with Google Apps)?

  - by allyourcode

  I know that GAE does not support this yet, but is there any reason it can't be done? If they can add support, I'd assume they're working on that. Have they said anything about this publicly?

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• database modeling for google app engine for multiple revison of entity.

  - by iamgopal

  hi, in my application ( kind of wiki clone ) - an article is frequently changing. and i need to track all changes that are done on that article. { text only. } one crude way i have done it, is to add a datetime property and create a new entity everytime something change. which is too much database wasting. { and also un-necessary index waste too. } and also need to re-create parent-child and entity relationships. i also have log which can show changes -- but i want some thing easier , so that jumping from one version to another version could be easier. ideas ? thanks.

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• how to set inbound mail for google-app-engine..

  - by zjm1126

  this is my set:

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