<a href={myLoc.createDefaultLink}>Foo</a>
In Scala, if the attribute is an Option[NodeSeq] and it is None, the
attribute will not be included where if it's Some(Text("/foo/bar")) it will
be included. Thus the choice of Option rather than Box and the choice of
NodeSeq rather than String.
In terms of your code:
(for {
loc <- SiteMap.findLoc("Login")
path <- loc.createDefaultPath
} yield <a href={path}>Login</a>) openOr NodeSeq.Empty
On Tue, Jan 26, 2010 at 2:29 AM, Adam Warski <a...@warski.org> wrote:
> Hello,
>
> I'm having some trouble generating a link basing on a Loc.
> My original use-case is to redirect the user to a login page if the user
> is not logged in. I found a wiki on this and it says there to simply
> redirect to "/user_mgt/login", however I think it would be much nicer if I
> could generate the link basing on looking up the right Loc.
>
> However having the Loc I can only generate a NodeSeq, not a plain String.
>
> So the solution would be to add a method into the Loc trait parallel to
> this one:
>
> def createDefaultLink: Option[NodeSeq] = currentValue.flatMap(p =>
> link.createLink(p)).toOption
>
> which would be:
>
> def createDefaultPath: Option[String] = currentValue.flatMap(p =>
> link.createPath(p)).toOption
>
> (btw., why is it Option here, not Box?)
>
> Then generating a link to the login page would simply be:
>
> SiteMap.findLoc("Login").open_!.createDefaultPath
>
> --
> Adam Warski
> http://www.warski.org
> http://www.softwaremill.eu
>
>
>
>
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