TLDR: Use Extra Lazy feature from Doctrine ORM: https://www.doctrine-project.org/projects/doctrine-orm/en/3.3/tutorials/extra-lazy-associations.html — Let’s imagine that we’re working on e-commerce platform. Each user can sold maximum 100 items How to do it properly? How to introduce domain limit on doctrine relationships? How can I introduce it? Let’s use rich entities (trying to follow Domain-Driven-Design and Test-Driven-Development rules): <?php […]