October 2015
Intermediate to advanced
368 pages
8h 49m
English
Content preview from Mastering Google App EngineBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Summary
In this chapter, we started with the need for data modeling and examined how to model data using the ndb's Model class. Then we dived into how it is stored internally, with all the properties serialized into a single column. Next we examined in detail how datastore constructs unique row keys for an entity by using the application ID, the current namespace, the Kind (the model's class name), and a unique identifier. We also studied how the identifier can be either a string or an integer. In the case it is an integer, we learned that datastore generates numeric IDs, and we can allocate our own range of IDs as well if we want to.
Next we examined the ndb.Key class and how it allows us to weld keys together to achieve some interesting effects. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.