Question

From the play2’s doc: http://www.playframework.org/documentation/2.0/ScalaForms, there is a sample code:

val loginForm = Form(
  tuple(
    "email" -> nonEmptyText,
    "password" -> text
  ) verifying("Invalid user name or password", { 
      case (e, p) => User.authenticate(e,p).isDefined 
  })
)

But it can’t be compiled, the error message is:

Multiple markers at this line
- missing parameter type for expanded function The argument types of an anonymous 
 function must be fully known. (SLS 8.5) Expected type was: ?

It should be wrote as:

verifying("Invalid user name or password", params => params match { 
    case (e, p) => User.authenticate(e,p).isDefined 
}

My play version is latest play2.1-SNAPSHOT(2012-03-18).

Is there something wrong with the doc, or do I miss something?

Answer 1

The docs are outdated/wrong, your second version is correct. You can fix the docs yourself, it’s a wiki.