Question

I would like to use Eclipse as IDE for a Scala web application using Play Framework. I downloaded Eclipse 3.6.2. Then I installed Scala IDE 2.0 (beta) for Eclipse. I downloaded Play Framework 1.2.2RC1 and installed the Scala Module using play install scala-0.9.1 and generated a new site with play new mysite. Then I eclipsified it with play eclipsify mysite and imported the project in Eclipse.

But now I get many errors in Eclipse. Is this anything I can fix or are the different projects incompatible?

This is the generated code that contains errors in Eclipse (but it works when I run the application).

package controllers

import play._
import play.mvc._

object Application extends Controller {

  import views.Application._

    def index = {
        html.index("Your Scala application is ready to go home!")
    } 
}

And this is how it looks like in Eclipse:

Answer 1

The error shown highlighted in your screenshot is caused by the new Scala template sources not being in the project Build Path. The eclipsify command doesn’t currently do this for you.

Manually add tmp/classes to the Build Path to resolve it.

But please note that new Scala template files are not generated from within Eclipse. So if you add a new template/page to your project, you must run ‘play run’ (or equivalent) first to have the file appear there. Also note that if you run the eclipsify command again in the future you will need to re-add this folder to your Build Path.