September 2018
Beginner to intermediate
218 pages
4h 27m
English
Content preview from Magento 2 Development Quick Start Guide
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The InstallSchema script
The InstallSchema script is used when we wish to add new columns to existing tables or create new tables. This script is run only when a module is enabled. Once enabled, the module gets a corresponding entry under the setup_module.schema_version table column. This entry prevents the InstallSchema script running on any subsequent setup:upgrade command where the module's setup_version remains the same.
Let's go ahead and create the <MAGELICIOUS_DIR>/Core/Setup/InstallSchema.php file with the following content:
use \Magento\Framework\Setup\InstallSchemaInterface;use Magento\Framework\Setup\ModuleContextInterface;use Magento\Framework\Setup\SchemaSetupInterface;class InstallSchema implements InstallSchemaInterface {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,
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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.