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Is GQL easy to learn for someone who knows SQL? How is Django/Python? Does App Engine really make scaling easy? Is there any built-in protection against ‘GQL Injections’? And so on…
I’d love to hear the not-so-obvious ups and downs of using app engine.
Cheers!
The most glaring and frustrating issue is the datastore api, which looks great and is very well thought out and easy to work with if you are used to SQL, but has a 1000 row limit across all query resultsets, and you can’t access counts or offsets beyond that. I’ve run into weirder issues, with not actually being able to add or access data for a model once it goes beyond 1000 rows.
See the Stack Overflow discussion about the 1000 row limit
Aral Balkan wrote a really good summary of this and other problems
Having said that, app engine is a really great tool to have at ones disposal, and I really enjoy working with it. It’s perfect for deploying micro web services (eg: json api’s) to use in other apps.