Tagged Questions

The Google App Engine datastore provides robust, scalable storage for your web application, with an emphasis on read and query performance.

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0
votes
1answer
23 views

How to edit a record using Java Servlet in Appengine

after much research, I was able to insert a record to Google Appengine with the followings below. However, now I've got an issue: I am unable to edit the record using the query following GQL or SQL ...
0
votes
1answer
27 views

Should I normalize an entity to one-to-one relationship model in gae

I have a student entity which already has about 12 fields.Now, I want to add 12 more fields(all related to his academic details).Should I normalize(as one-to-one) and store it in a different entity or ...
1
vote
1answer
58 views

Highly variable performance on datastore and memcache operations (GAE)

I am trying to optimize performance on GAE but once I deploy I get very unstable results. It's really hard to see if each optimization actually works because datastore and memcache operations take a ...
0
votes
1answer
13 views

Google App Engine + JDO + Datastore: OR operator on key based filter

I'm trying to get a list of instances from Datastore through a query that filters on an unowned relation on a field named "account". This query works (it returns some results): SELECT FROM ...
69
votes
19answers
39k views

How to delete all datastore in Google App Engine?

Does anyone know how to delete all datastore in Google App Engine?
0
votes
2answers
527 views

How to get text from app engine datastore?

Can someone please tell me how to get a Text value out of a Google App Engine datastore using Java? I have some entities in the datastore with a Text property named longDescription. When I try this: ...
0
votes
2answers
41 views

get_by_id doesn't seem to get by id

There is an entity in the Questions table with ID 6544293208522752. When I try to get this back using Questions.get_by_id(6544293208522752) it returns None. ------ Update To get the parent, ...
0
votes
1answer
20 views

KeyFactory.createKey() Is this the correct way of storing data in Datastore

each user can have many questions. questions can only have one user. is the following correct Key questionKey = KeyFactory.createKey("Questions", userId); Entity questionEntity = new ...
4
votes
0answers
59 views

GAE: Exceeded maximum allocated IDs

It seems gae assigns very high IDs to the models. When I download my entities, I get for some entries very big numbers. These were autogenerated in first place. Downloading them as csv is no problem. ...
1
vote
3answers
51 views

How to properly save form data in Google App Engine

I have an email form where I'm trying to save the user's email address to the database. The model looks like this: class EmailForm(db.Model): ...
0
votes
0answers
21 views

Search query on 7 search filters and sort on 80 fields Google App Engine Datastore

I have a situation where I am searching on 7 different parameters (search filter of 7 different parameters) and then need to sort the results in 80 different columns in the table (one at a time). ...
0
votes
1answer
21 views

Can I use SQLite libraries on google app engine?

I'm currently using Google Datastore for storing data. I want to keep an offline version in the form of sql database. Is it possible to use sqlite on google app engine to convert datastore into sql ...
0
votes
1answer
16 views

find GAE datastore entities by CompositeFilterOperator in a key list subset

I have two dependent classes : let's say a product an eventual favorite flag per user on that product (many users can flag a product as favorite) When I need to execute filtering in the subset of ...
3
votes
2answers
217 views

Restoring Google App Engine datastore

I am trying to implement in Java what we discussed here: options for restoring appengine datastore data? .. but I have some problems. Here is my code: ...
0
votes
1answer
74 views

google protobuf api in android for google cloud datastore

I'm trying to use a google lib to read and write inside the google cloud datastore from an Android App. The library is this one: google-api-services-datastore-protobuf-java-v1beta1-rev1-1.0.0 I ...

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