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• is the sender of google-app-engine allow my own gmail..

  - by zjm1126

  my gmail is [email protected] i can only use [email protected] in the sender=".." ,yes ?? from google.appengine.api import mail message = mail.EmailMessage(sender="[email protected]", subject="Your account has been approved") message.to = "[email protected]" message.body = """ Dear Albert: Your example.com account has been approved. You can now visit http://www.example.com/ and sign in using your Google Account to access new features. Please let us know if you have any questions. The example.com Team """ message.send() thanks

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• How to send data from local PC to Google-app-engine application?

  - by vital-al-kapus

  I have to write client program in C# that have to take some data from DB and sent it to my Google application(Java). How can I do that? What is the best way to do that?

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• How can I implement a user name availability check on the google app engine?

  - by Spines

  When someone signs up for my website they must sign up with a unique user name. My current pseudocode for this is: if(datastore.nameIsAvailable(name)){ datastore.createUser(name); } How do I make sure that in between the time when nameIsAvailable returns true, and the createUser is finished, another instance of my app doesn't create a user with the same name?

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• How to sent data from local PC to Google-app-engine application?

  - by vital-al-kapus

  I have to write client program in C# that have to take some data from DB and sent it to my Google application(Java). How can I do that? What is the best way to do that?

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• how to make multi url in a line of '- url:' ,on google-app-engine.

  - by zjm1126

  like this: handlers: - url: /media static_dir: media - url: /form;/items.html script: validate.py /form;/items.html i want /form and /item.html use validate.py thanks

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• Google app engine - what is the lifecycle of PersistenceManager?

  - by Domchi

  What is the preferred way of using GAE datastore PersistenceManager for web app? GAE instructions are a bit ambiguous on the matter. Do I instantiate PersistenceManagerFactory for each RPC call, or do I use only one factory for all requests? Do I call PMF.get().getPersistenceManager(), or do I call PMF.get().getPersistenceManagerProxy()? Do I close PM after each RPC call, or do I leave it open? What are you guys doing? Furthermore, I'm not certain how GAE handles 30-second-per-request limit. Is it even possible to reference the same PM between requests?

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• How to work with Google maps from Google app engine?

  - by vital-al-kapus

  I have informations about some objects stored in BigTable(coordinates and few more) and I have to put this objects on Google map. How can I do that? (Please write some code example. I am using java for my application).

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• Is it ok to add adSense to an App Engine?

  - by Juanjo Conti

  Is there any restriction? Other kind of advertisements?

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• Can I specify the order of how changes happen in an single App Engine transaction ? Is it equal to t

  - by indiehacker

  If I passed a list of key ids as an argument in a transaction, would the change associated with the first key in the list happen first? And if not, how do I specify the order that I want the changes to happen in? As a concrete example, consider this code below from Google Docs Transactions--would changes to the first item in acc.key() happen first? class Accumulator(db.Model): counter = db.IntegerProperty() Docshttp://code.google.com/appengine/docs/python/datastore/transactions.html: def increment_counter(key, amount): obj = db.get(key) obj.counter += amount obj.put() q = db.GqlQuery("SELECT * FROM Accumulator") acc = q.get() db.run_in_transaction(increment_counter, acc.key(), 5)

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• did you know some Webapp plug-in about google-app-engine..

  - by zjm1126

  i know one : http://github.com/snakajima/gdispatch, has any much more ? thanks

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• remote_api in google app engine is the best way to store data ??

  - by zjm1126

  i don't know what the remote_api will do thanks

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• Image storage as a service

  - by Samuel

  Google App Engine provides a image API for storing / retrieving images. We are currently not in a position to deploy our application on top of App Engine because of limitations in the java frameworks (jboss seam 2.2.0) we are using to build our j2ee application. We would eventually want to deploy our production application on top of Google App Engine, but what are the short term options (java based open source products) which provides comparable functionality to Google App Engine's Image API and will have an easier migration path at a later point in time.

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• how to make my method running on the template of google-app-engine..

  - by zjm1126

  the model is : class someModel(db.Model): name = db.StringProperty() def name_is_sss(self): return self.name=='sss' the view is : a=someModel() a.name='sss' path = os.path.join(os.path.dirname(__file__), os.path.join('templates', 'blog/a.html')) self.response.out.write(template.render(path, {'a':a})) and the html is : {{ a.name_is_sss }} the page shows : True so i want to make it more useful, and like this: the model: class someModel(db.Model): name = db.StringProperty() def name_is_x(self,x): return self.name==x the html is : {% a.name_is_x 'www'%} or {{ a.name_is_x 'www'}} but the error is : TemplateSyntaxError: Invalid block tag: 'a.name_is_x' or TemplateSyntaxError: Could not parse the remainder: 'www' so how to make my method running thanks

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• Why use Google app engine for huge social networking project? Or why not to use it...

  - by Ralphz

  Like in the topic.

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• How to instert child entities in JDO (Google App Engine) ?

  - by Kerem Pekçabuk

  How do i add a record to a child entity in the example below ? For example i have a Employee Record which is name is "Sam". how do i add 2 street adress for sam ? Guess i have a The Parent entity is Employee import java.util.List; // ... @Persistent(mappedBy = "employee") private List contactInfoSets; The Child key is Adress import com.google.appengine.api.datastore.Key; // ... imports ... @PersistenceCapable public class ContactInfo { @PrimaryKey @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) private Key key; @Persistent private String streetAddress; // ... }

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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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• 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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• 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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• How do I represent many to many relation in the form of Google App Engine?

  - by Jacky

  class Entry(db.Model): ... class Tag(db.Model): ... class EntryTag(db.Model): entry = db.ReferenceProperty(Entry, required=True, collection_name='tag_set') tag = db.ReferenceProperty(Tag, required=True, collection_name='entry_set') The template should be {{form.as_table}} The question is how to make a form to create Entry where I can choose to add some of the tags ?

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• which is better to send mail on google-app-engine..

  - by zjm1126

  this: http://code.google.com/intl/en/appengine/docs/python/tools/devserver.html The web server can use an SMTP server, or it can use a local installation of Sendmail. i download the Sendmail lib,and find it is so big, and so many doc, i want to know which way is better, and if the Sendmail way is better, how to use it simplely, thanks

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• App Engine - Is the memcache shared amongst versions of an app?

  - by Spines

  I know the datastore is shared amongst different versions of the same app. Is the memcache?

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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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• 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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• 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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• Google App Engine - Is this just a fluke, or could changing the version of an app improve cold-start

  - by Spines

  Here is the situation: I had an app with a cold start time of about 4 seconds. I was trying to improve the cold start time by removing a bunch of libraries and code I didn't really need. After doing that the cold start time was about 3 seconds latency, and 3 seconds CPU time used. I changed the version number in appengine-web.xml, and nothing else. And now I have two versions of my app that have the exact same code, up and running. For cold starts, the newer version uses 1800ms to 1900ms in CPU time, and has 1800ms to 2300ms in latency. For cold starts, the older version uses 2800ms to 3000ms in CPU time, and has 2300ms to 3600ms in latency. So far I have sampled 4 cold starts for each version.

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