A web application is not complete without an API nowadays. APIs allow third parties - or just end users - to use the data from the platform for whatever they want. But by allowing applications to make automated calls to your API can result quickly in our systems overloading. Too many times third party applications will be polling your API when they don’t really need too, and maybe you can lighten the load a bit with some heavy-duty caching, but in essence you want that every API call made matters.
If you know Symfony2, you probably are using (or at least, have heard of) the @paramConverter annotation from the SensioFrameworkExtraBundle. This is a really simple way to convert slugs into entities. But lots of times I find myself having multiple slugs inside my routes, and this is something the @paramConverter annotation cannot do. So that’s why I’ve created the multiParamConverter.