A Box is a container that holds 0 or 1 elements(s). openOr means if the Box is
Full return the element; otherwise return the parameter--my default value.
One alternative approach would be to specify a default Loc.
-------------------------------------
Peter Robinett<pe...@bubblefoundry.com> wrote:
Thanks Naftoli and David, I'm starting to understand what I need to
do. However, the solution has revealed a gap in my beginner's
knowledge of Scala: why was my code printing out the Loc instead of
"Couldn't open"?
Second, even with foundParam.is within the for comprehension, I still
need to get the the value out of the comprehension – the rest of my
snippet is based upon it. So, I still need to openOr the Box, no? If
so, how? Is there a more functional and Scalarific way to do this?
Thanks for your help,
Peter
On Jul 1, 2:45 pm, David Pollak <feeder.of.the.be...@gmail.com> wrote:
> On Wed, Jul 1, 2009 at 2:02 PM, Peter Robinett <pe...@bubblefoundry.com>wrote:
>
>
>
> > Thanks, David. Unfortunately I'm having a hard time figuring out how
> > to get the foundParam.
>
> > Using your code, I have:
> > val loc = for {req <- S.request; loc <- req.location} yield loc
> > val l = loc openOr "Couldn't open"
>
> When in doubt, specify a type explicitly:
>
> val l: Loc[_] = loc openOr "Couldn't open"
>
> This will fail because you've got a Box[Loc[_]] and you're doing an openOr
> with a String... the only common class between the two is Object.
>
> As another post suggested, do the foundParam.is inside the yield
>
>
>
>
>
> > println(loc)
> > println(l)
>
> > The first println give me:
> > Full(Loc(View List(nodes), <function>, LinkText(<function>), List()))
>
> > While the second shows that I am opening the Box:
> > Loc(View List(nodes), <function>, LinkText(<function>), List())
>
> > If I try to access my Loc object, I get compilation errors. For
> > example, "val p = l.foundParam" leads to the error "value foundParam
> > is not a member of java.lang.Object." The toString method works, while
> > the title parameter gives me the same error. I believe I am using the
> > latest Lift code (I ran "mvn -U jetty:run") and feel I must be missing
> > something very simple here.
>
> > Any advice is much appreciated!
>
> > Peter
>
> > On Jun 29, 10:05 am, David Pollak <feeder.of.the.be...@gmail.com>
> > wrote:
> > > On Fri, Jun 26, 2009 at 6:39 PM, Peter Robinett <pe...@bubblefoundry.com
> > >wrote:
>
> > > > Thanks, Derek and Jeppe, your responses were very helpful. I
> > > > implemented Jeppe's solution and added my own snippet tag within
> > > > _viewTemplate. Unfortunately, I spent the whole day trying to figure
> > > > out how pass the current CRUDified object to my snippet. Do I retrieve
> > > > it in _viewTemplate from S.params and add an attribute to the snippet
> > > > tag? Or just retrieve it from S in the snippet?
>
> > > I've just made Loc.foundParam public. If you get the Loc from the Req
> > from
> > > S (for {req <- S.request; loc <- req.location}) you can access foundParam
> > > which contains the current crudified object.
>
> > > Thanks,
>
> > > David
>
> > > > I think I'm missing
> > > > something fundamental with the S object and snippets. As you can tell,
> > > > I'm very new to Lift! Any advice is much appreciated.
>
> > > > Peter
>
> > > > On Jun 24, 11:01 am, Jeppe Nejsum Madsen <je...@ingolfs.dk> wrote:
> > > > > On 24 Jun 2009, Peter Robinett wrote:
>
> > > > > > Hi all,
>
> > > > > > I'm using CRUDify on one of my models and I'd like to display some
> > > > > > additional data on the view template. I believe that I need to
> > > > > > override one of the model definitions with some sort of reference
> > to
> > > > > > my own XHTML file. Which one? _viewTemplate? Or perhaps the
> > > > > > viewTemplate method?
>
> > > > > If you look at the source to CRUDify, you'll see
>
> > > > > def viewTemplate(): NodeSeq = pageWrapper(_viewTemplate)
>
> > > > > where
>
> > > > > def pageWrapper(body: NodeSeq): NodeSeq =
> > > > > <lift:surround with="default" at="content">
> > > > > {
> > > > > body
> > > > > }
> > > > > </lift:surround>
>
> > > > > def _viewTemplate =
> > > > > <lift:crud.view>
> > > > > <table id={viewId} class={viewClass}>
> > > > > <crud:row>
> > > > > <tr>
> > > > > <td><crud:name/></td>
> > > > > <td><crud:value/></td>
> > > > > </tr>
> > > > > </crud:row>
> > > > > </table>
> > > > > </lift:crud.view>
>
> > > > > So the simplest thing is to override _viewTemplate with something
> > similar
> > > > > to the above. This should be done on the companion objects where
> > CRUDify
> > > > > is mixed in....
>
> > > > > /Jeppe
>
> > > --
> > > Lift, the simply functional web frameworkhttp://liftweb.net
> > > Beginning Scalahttp://www.apress.com/book/view/1430219890
> > > Follow me:http://twitter.com/dpp
> > > Git some:http://github.com/dpp
>
> --
> Lift, the simply functional web frameworkhttp://liftweb.net
> Beginning Scalahttp://www.apress.com/book/view/1430219890
> Follow me:http://twitter.com/dpp
> Git some:http://github.com/dpp
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