Domain-Driven Design in PHP

Key Concepts

Persistence engines — and databases in particular — have some features for fighting data inconsistencies: ACID, constraints, referential integrity, locking, concurrency controls, and transactions. Let's review these concepts before working with Aggregates.

Most of these concepts are on the Internet and available to the public. We want to thank the people at Oracle, PostgreSQL, and Doctrine for doing amazing work with their documentation. They have carefully defined and explained these important terms, and rather than reinvent the wheel, we've compiled some of these official explanations to share with you.