Scala Upgrade procedure, for the Typesafe/Scala stack under IntelliJ?

Question

Scala is an awesome language. And IntelliJ 12's integration with the Typesafe stack (Scala, Akka, and the Play Framework) is equally impressive.

But, the upgrade process for upgrading the version of Scala version under IntelliJ isn't particularly clear. I'm using Play 2.0, IntelliJ 12 and currently Scala 2.91. My first attempt to upgrade to Scala 2.10 didn't go well: pre-existing Play projects are still fixated on using Scala 2.91 libraries and the 2.91 compiler. Attempting to create new Play projects and execute the "idea" command: generated IJ project files are generated for 2.91.

Even if I explicitly remove the 2.91 .jars and add the 2.10 .jars, It seems that I am still stuck with the 2.91 Scala compiler. There just has to be a simpler way to upgrade Scala, and still have the full Typesafe stack building and launching under IJ 12 ... I just haven't found it yet.

Answer 1

To use Scala 2.10 with Play you will need to upgrade to Play 2.1.