Action.async and using for-comprehention in a seperate function - scala

Question

This might be even more Scala than Play related, but I have this issue within some Play code.
I have
def index = Action.async { implicit request =>
val content1Future = Blogs.getAllBlogs(request)
val sidebar1Future = Blogs.getAllBlogsOverview(request)
for {
sidebar1 <- sidebar1Future
content1 <- content1Future
sidebar1Body <- Pagelet.readBody(sidebar1)
content1Body <- Pagelet.readBody(content1)
} yield {
val sidebarcontents = List(sidebar1Body)
val contents = List(content1Body)
Ok(views.html.main("Index", contents, sidebarcontents)).withHeaders(("Cache-Control", "no-cache"))
}
and it works fine.
Now, I try to extract the for-comprehention into a separate function dealing with 'sidebar' and I want to pass in the 'content'.
Like
def index = Action.async { implicit request =>
standardMain(Blogs.getAllBlogs(request))
}
def standardMain(content1Future: => Future[Result])(implicit request: Request[_]) : Future[Result] = {
val sidebar1Future = Blogs.getAllBlogsOverview(request)
for {
sidebar1 <- sidebar1Future
content1 <- content1Future
sidebar1Body <- Pagelet.readBody(sidebar1)
content1Body <- Pagelet.readBody(content1)
} yield {
val sidebarcontents = List(sidebar1Body)
val contents = List(content1Body)
Ok(views.html.main("Index", contents, sidebarcontents)).withHeaders(("Cache-Control", "no-cache"))
}
}
But then I get
[info] Compiling 1 Scala source to D:\Dropbox\Playground\PlayWorld\play-with-forms\target\scala-2.11\classes...
[error] D:\Dropbox\Playground\PlayWorld\play-with-forms\app\controllers\Application.scala:91: type mismatch;
[error] found : scala.concurrent.Future[play.api.mvc.Result]
[error] required: play.api.libs.iteratee.Iteratee[Array[Byte],?]
[error] content1 <- content1Future
[error] ^
[error] D:\Dropbox\Playground\PlayWorld\play-with-forms\app\controllers\Application.scala:90: type mismatch;
[error] found : play.api.libs.iteratee.Iteratee[Array[Byte],Nothing]
[error] required: scala.concurrent.Future[play.api.mvc.Result]
[error] sidebar1 <- sidebar1Future
[error] ^
[error] two errors found
[error] (compile:compile) Compilation failed
[error] application -
I tried many different calls, but somehow I do not know how to get an play.api.libs.iteratee.Iteratee[Array[Byte],?].
How can I achive this. Thanks.