I’ve been trying to model a relationship in Laravel between a ShapeContainer entity and different shapes with unique properties, but a common Shape interface (with getArea and getPerimeter methods). I’ve read up on the examples in the laravel documentation (posts, videos, comments), but in that example the child entity (Comment) can belong to different types of parents. In my case I want the parent entity (ShapeContainer) to be able to handle different types of children (Circle, Rectangle etc).