Does Solidus support applying multiple promotion codes to one order?

Yes, the data model supports that. What feature du you want to achieve?

My client is considering moving from Presta to Spree/Solidus and one of the features Presta has is being able to apply multiple coupon codes to one order. And that feature is crucial for him. From what i know - Spree can't do that but don't quote me on that 🙂

Stock solidus will gladly attach many promo codes to an order. But for each adjustable, it will choose the one best adjustment. So the question is what the multiple codes do when applied.

ah, so that's what spree is doing as well - choosing the best one

Solidus allows customizing that behavior. There's a

promotion_chooser_class

that you can implement yourself with whatever behavior you prefer

ah, nice, thank you! I'm starting to regret i didn't choose Solidus as you guys provide a lot of solutions i had to implement on my own in spree