October 2017
Intermediate to advanced
566 pages
14h 31m
English
Content preview from Drupal 8 Module Development
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Content entity validation
The last thing we are going to talk about in this chapter is entity validation and how we can make sure that field and entity data as a whole contains valid data. When I say valid, I don't mean whether it complies with the strict TypedData definition but whether, within that, it complies with certain restrictions (constraints) we impose on it.
Drupal 8 uses the Symfony Validator component for applying constraints and then validating entities, fields and any other data against those constraints. I do recommend that you check out the Symfony documentation page on this component to better understand its principles. For now, let's quickly see how it is applied in Drupal 8.
There are three main parts to a validation--a ...
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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.