October 2017
Intermediate to advanced
566 pages
14h 31m
English
Content preview from Drupal 8 Module Development
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Data definitions
Data definitions are the objects used to store all that meaning about the underlying data we talked about. They define the type of data they can hold (using an existing DataType plugin) and any kind of other meaningful information about that data. So, together with the plugins, the data definitions are one mean data modeling machine.
At the lowest level, they implement the DataDefinitionInterface and typically extend the DataDefinition class (or one of its subclasses). Important subclasses of DataDefinition are the ListDefinition and ComplexDefinitionBase which are used to define more complex data types. And as you might expect, they correlate to the ListInterface and ComplexDataInterface plugins I mentioned earlier.
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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.