Learn Symfony2 - Persisting Additions to a Form Collection [4 of 5]

In the last video we looked at how to remove things from our Form Collection. In this video we cover how to persist your changes to your database. There's additional logic / code involved in getting your additions to be saved off to your DB, and covering all of that during the earlier theory stage would have been quite confusing. So now you have a better grasp of what's going on in the front end, we can fix the back end so our changes are saved. And through the magic of cascades, we only need to persist one entity / object, and all sub objects are updated for us.