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Here's why you should consider throwing exceptions in your repositories.
99% of the time you're going to want to bail if you're expecting to find an entity by a specific key. Having code like the two private methods in the old code below in every single one of your handlers is crazy and not DRY....

Here's a little Doctrine ORM tip to safeguard your business logic when dealing with collections.
Do you have some business logic tied up in your adder methods? Something like this maybe.
Look how easy it is for another developer to accidentally skirt your nice logic....

It really irks me when I see some design/architecture decisions other developers have made but there's no technical explanation. What packages did they use? What challenges did they face? What trade-offs were made?
I'll go over some more specifics in this post....

One of the biggest struggles for me, as an app developer, is coming up with an architecture that I'm happy with. It's something I wish other developers talked about more often. I thoroughly enjoyed Kris Wallsmith's SymfonyCon talk. It's very raw and...