Thanks for responding Marius. You're right, my doSearch method
doesn't need the msg parameter -- that was just an artifact of
transforming an example (removed now). As far as my specific issue, I
guess you're saying the best solution is for the framework to add
overload def -%>(in: NodeSeq => NodeSeq) congruent with -> -- should I
file a feature request? As you said, Group(FocusOnLoad...) doesn't
compile either because it returns a Node, not the currently required
Element. Did I misunderstand? In the short term how would you solve
this ?
Thanks,
- Luke
On Mar 6, 1:39 am, Marius <marius.dan...@gmail.com> wrote:
> On 22 feb., 04:12, Luke Nezda <lne...@gmail.com> wrote:
>
>
>
> > Hello,
>
> > I am new to Scala and Lift. I am having a problem using 2 features
> > together which seem to work fine individually. Here's a simplified
> > piece of the code:
>
> > class Ajax {
> > def someResult(q:String) = <span>some results for query {q}...</
> > span>
> > // searchField closure
> > def searchField(xhtml: NodeSeq): NodeSeq = {
> > // build up an ajax text box
> > def doSearch(msg: NodeSeq) = {
> > // doesn't compile with bind: "searchBox" -%> doSearch _
> > FocusOnLoad(SHtml.ajaxText("", q => SetHtml("resultz",
> > someResult(q))))
> > // compiles with bind: "searchBox" -%> doSearch _
> > // SHtml.ajaxText("", q => SetHtml("resultz", someResult(q)))
> > }
> > // bind the view to the functionality
> > bind("ajax", xhtml,
> > "searchBox" -> doSearch _
> > // doesn't compile if doSearch returns result of FocusOnLoad
> > //"searchBox" -%> doSearch _
> > )
> > }
>
> > }
>
> > and the template invocation:
>
> > <lift:surround with="default" at="content">
> > <lift:Ajax.searchField id_msgs="messages">
> > <ajax:searchBox class="text" type="search" tabindex="1" />
> > <hr class="space"/>
> > <div id="resultz"></div>
> > <div id="messages"></div>
> > </lift:Ajax.searchField>
> > </lift:surround>
>
> > My goal is an Ajax-enabled text input that gets focus when the page
> > loads and has various attributes of the input element set. I realize
> > I can use the SHtml.ajaxText variant that takes attribute-value pairs,
> > as in:
>
> > FocusOnLoad(SHtml.ajaxText("", q => SetHtml("resultz",
> > Yawni.query(q)), ("class", "text"), ("type", "search"), ("tabindex",
> > "1")))
>
> > but I'm trying to keep the various element attributes in the template.
>
> > When I try to bind with:
> > "searchBox" -%> doSearch _
> > instead of:
> > "searchBox" -> doSearch _
>
> > I get the following compile error:
>
> > snippet/Ajax.scala:109: error: overloaded method value -%> with
> > alternatives ((scala.xml.NodeSeq) =>
> > scala.xml.Elem)net.liftweb.util.Helpers.FuncBindParam <and>
> > (Option[scala.xml.Elem])net.liftweb.util.Helpers.FuncBindParam <and>
> > (net.liftweb.common.Box[scala.xml.Elem])net.liftweb.util.Helpers.FuncBindPa
> > ram
> > <and> (scala.xml.Elem)net.liftweb.util.Helpers.FuncBindParam cannot be
> > applied to ((scala.xml.NodeSeq) => scala.xml.NodeSeq)
> > "searchBox" -%> doSearch _
> > ^
> > one error found
>
> Why your doSearch function takes a msg parameter? ... it doesn't seam
> to use it.
>
> doSearch _ is a partially applied function and acts as a (NodeSeq) =>
> NodeSeq however -%> has only a definition like:
>
> def -%>(in: NodeSeq => Elem)
>
> while -> also has
>
> def ->(in: NodeSeq => NodeSeq)
>
> which is why you get the compile error. We should add the same
> definition for NodeSeq => NodeSeq
>
> You can simply say:
>
> "searchBox" -%> doSearch
>
> and have def doSearch: NodeSeq = ...
>
> FocusOnLoad returns a NodeSeq because it returns a sequence of nodes
> which conceptually cannot be converted to an elem. You could try to
> have a Group(FocusOnLoad ...) ... but Group is a Node not an Elem.
>
>
>
> > Between all the bind() and ->()/-%>() overloads and my general Scala /
> > Lift ignorance, I can't understand what the right way to resolve this
> > is. I think it has something to do with FocusOnLoad returning a
> > NodeSeq (<input/><script/>) vs. an Element, but I don't know where to
> > go from here...
>
> > Thanks in advance,
> > - Luke
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