On Sun, Feb 22, 2009 at 10:20, babysnakes <[email protected]> wrote:
>
> Phew, that was hard
>
> I've found the problem. In the TD.scala class I had:
> def add(form: NodeSeq) {
> ...
>
return type is Unit ( == void in java/C)
the explicit version :
def add(form: NodeSeq) : Unit = {
=> nothing to display
> But I should have had:
> def add(form: NodeSeq) = {
> ...
return type is infered from your last expression
the explicit version (in case you return a NodeSeq (html fragment) :
def add(form: NodeSeq) : NodeSeq = {
=> a xml fragment to display
>
> I'm still a complete scala newbie so I don't even sure what's the
> difference
> but I've just started reading the scala book, so I guess I'll catch it
> soon enough.
>
> Thanks.
>
> On Feb 22, 1:21 am, babysnakes <[email protected]> wrote:
> > Hi
> >
> > I'm trying to run the starting guide with version 0.10. When I got to
> > the ToDo section (2.11), I got the error above. The page renders all
> > the <todo:...> tags instead of replacing them with the 'toForm'
> > method.
> >
> > Here is my relevant files:
> >
> > TD.scala
> > =======
> > package lift.workshop.snippet
> >
> > import lift.workshop._
> > import model._
> >
> > import net.liftweb._
> > import http._
> > import SHtml._
> > import S._
> >
> > import js._
> > import JsCmds._
> >
> > import mapper._
> > import util._
> > import Helpers._
> >
> > import scala.xml.{NodeSeq, Text}
> >
> > class TD {
> > def add(form: NodeSeq) {
> > val todo = ToDo.create.owner(User.currentUser)
> >
> > def checkAndSave(): Unit =
> > todo.validate match {
> > case Nil => todo.save; S.notice("Added " + todo.desc)
> > case xs => S.error(xs); S.mapSnippet("TD.add", doBind)
> > }
> >
> > def doBind(form: NodeSeq) =
> > bind("todo", form,
> > "priority" -> todo.priority.toForm,
> > "desc" -> todo.desc.toForm,
> > "submit" -> submit("New", checkAndSave))
> >
> > doBind(form)
> > }
> >
> > }
> >
> > index.html
> > ========
> > <lift:surround with="default" at="content">
> > <lift:Util.out>Please
> > <lift:menu.item name="Login">Log In</lift:menu.item>
> > </lift:Util.out>
> > <lift:Util.in>
> > <lift:TD.add form="post">
> > <table>
> > <tr>
> > <td>Description:</td>
> > <td><todo:desc>To Do</todo:desc></td>
> > </tr>
> > <tr>
> > <td>Priority:</td>
> > <td><todo:priority>
> > <select><option>1</option></select>
> > </todo:priority></td>
> > </tr>
> > <tr>
> > <td> </td>
> > <td>
> > <todo:submit>
> > <button>New</button>
> > </todo:submit>
> > </td>
> > </tr>
> > </table>
> > </lift:TD.add>
> > </lift:Util.in>
> > </lift:surround>
> >
> > = = = = = = = = = = = = = = =
> >
> > Am I missing something?
> >
> > Thanks in advance
> > --
> > Haim
>
> >
>
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