CODEWITHSUNDEEP
scalaakkaakka-http
uniXVanXcel
uniXVanXcel

Reputation: 806

not found value ~ in Scala

I am defining some paths but then i run into this error for the tilde ~ right before " pathPrefix(start)" . I am a bit new in Scala and so something do not click right away. thanks

 not found:value ~

Is it because i need to define a function? If so why? 

import   
  akka.http.scaladsl.marshallers.xml.ScalaXmlSupport.defaultNodeSeqMarshaller
    import akka.http.scaladsl.server.{ HttpApp, Route }
    import akka.http.scaladsl.model.StatusCodes
    import akka.actor.ActorSystem
    import akka.stream.ActorMaterializer
    import com.typesafe.config.ConfigFactory
    import akka.event.Logging
    import akka.http.scaladsl.model._


    object ABC extends HttpApp with App {

          implicit val actorSystem = ActorSystem()
          implicit val matter = ActorMaterializer()                                                               
          val start = "hello"

        val Routing= {

            path(start) {
              redirect( Uri(start+ "/index.html"), StatusCodes.PermanentRedirect )
              } 
              ~
              pathPrefix(start) {         
                 content  

                }
            } 

val content = 
{ 
 get 
   {
    path("html") {
                 getFromResource("src/html") }
  }
}

}

Upvotes: 1

Views: 911

Answers (3)

Ricardo
Ricardo

Reputation: 4308

If you're using Anorm from Play Framework, this other import may help you:

import anorm._

Anorm has its own definitions of the ~ (tilde) function, e.g. parsing a SQL row into a Scala object:

The columns can also be specified by position, rather than name:

import anorm._

// Parsing column by name or position
val parser =
  str("name") ~ float(3) /* third column as float */ map {
    case name ~ f => (name -> f)
  }

val product: (String, Float) = 
  SQL("SELECT * FROM prod WHERE id = {id}")
  .on("id" -> "p").as(parser.single)

Upvotes: 1

Stefano Bonetti
Stefano Bonetti

Reputation: 9023

Once you added the import as per @chunjef answer, also note that ~ is an infix operator, so it comes with all the "quirks" of it. To sort out your routes, you can avoid placing the ~ in a new line

    val Routing= {

        path(start) {
          redirect( Uri(start+ "/index.html"), StatusCodes.PermanentRedirect )
          } ~
          pathPrefix(start) {         
             content  

            }
        }

or you can wrap the concatenated routes in brackets

   val Routing= {

        (path(start) {
          redirect( Uri(start+ "/index.html"), StatusCodes.PermanentRedirect )
          } 
          ~
          pathPrefix(start) {         
             content  

            })
        }

Upvotes: 3

Jeffrey Chung
Jeffrey Chung

Reputation: 19517

Make sure you have the following import:

import akka.http.scaladsl.server.Directives._

Upvotes: 6

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