CODEWITHSUNDEEP
scalalift
Joa Ebert
Joa Ebert

Reputation: 6715

What is the Lift-way to convert Box[Elem] to LiftResponse?

I came across this issue already a couple of times and I wonder what the Lift-way is to perform such an action. Of course I could do my own error handling etc. but basically I wonder how I can turn a Box[Elem] into a LiftResponse. Ideally an XmlResponse of course.

The scenario is that I am using the RestHelper for an API and I have a function that returns me a Box[Elem]. I would like to make use of the async support.

The error I get is that Box[Elem] (or Box[NodeSeq], Box[Node]) cannot be converted to LiftResponse. However the exact same code without using RestContinuation works.

Note: I do not want Lift to do any template processing logic. Just output the XML the same way it would happen without using RestContinuation.

val userId = S.param("userId") map { _.toInt }

RestContinuation.async {
  reply => {
    reply(
      for {
        user <- userRepo.select(userId) ?~ "No such user." ~> 404
      } yield {
         <user>
           <name>{user.name}</name>
         </user>
      }
    )
  }
}

Upvotes: 1

Views: 262

Answers (1)

Debilski
Debilski

Reputation: 67888

I think there is an implicit declaration missing. You can bring this implicit (implicit def canNodeToResponse(in: Box[Seq[Node]]): LiftResponse in scope by mixing-in the trait XMLApiHelper in the surrounding class.

Upvotes: 1

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