May 2009
Beginner to intermediate
272 pages
5h 59m
English
Content preview from Using 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,
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.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.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.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.
Chapter 8. App Engine Datastore
When using Google App Engine, we do not have access to a traditional relational database such as Oracle, MySQL, or SQLite. Instead, we have access to the Google Datastore, which takes more of a hierarchical object-oriented storage approach. The Google Datastore is based on Google’s Bigtable technology; go to http://labs.google.com/papers/bigtable.html for more information.
The focus of Bigtable and the Google Datastore is to achieve efficient application scalability within the Google cloud, given the dynamic and distributed nature of the Google production infrastructure.
For users who are familiar with relational databases, the Google Datastore will seem somewhat different. Beginning users may find that the Google Datastore is much simpler to get started with than a relational database would be. If you learn the App Engine Datastore first and then switch to relational databases, you might find relational databases a bit clunky compared to the App Engine Datastore.
The Google App Engine Datastore, much like with templates, uses syntax similar to the approach that Django uses to describe its Models.
We will explore basic use of the Datastore by modifying our application to allow users to create real accounts with real passwords and store those user accounts in the Datastore.
The Model-View-Controller Pattern
Now that we are adding some data storage to our application, it is time to revisit the Model-View-Controller (MVC) pattern.
To review, the MVC pattern ...
Become 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,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.