March 2019
Intermediate to advanced
580 pages
15h 3m
English
Content preview from Drupal 8 Module Development - Second Edition
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Transactions
The Drupal database API also provides a way to represent and handle database transactions (for database types that support them). Transactions are a way in which database operations can be wrapped and grouped together with a view of committing them in an "all or none" type of fashion. For example, if you have multiple records that are related, it's possible you will want only some of them written if one fails its INSERT operation for some reason. This could leave you with corrupt or incomplete data that could throw your application into a spin.
Performing multiple database-changing operations after a transaction has been opened only finalizes (commits) those changes to the database when that transaction closes. If something goes ...
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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.