Category: Programming internals
Why not migrate directly?
I developed the first version of the software for a long time and ended up with Symfony version 2.8, after it was actively supported. I tried to migrate to symfony 3.4 using several of the migration guides available, but I failed. I could not get the system up and running again, because there are a lot of dependencies in the versions of the components, mixed with deprecations at a lot of places. To fix this, I started with a completely different approach: Start with a fresh up to date empty Symfony 4.3, and then migrate each file one by one. With this approach, I can also update each file and get the most benefit from new features, e.g. use the service injection / auto wiring also in non-service classes.
Read more: Migration from Symfony 2.8 to 4.3