On Jan 30, 2:14 pm, Sergey Andreev <andser...@gmail.com> wrote:
> Marius, thanks for the code sample. I read your mails about that usage of
> the redirectTo method on the list before but was confused how to use it. I
> wish there was a way to hide function's hash code from the URL without
> losing state.
Lift knows which functions to invoke upon a request based on the query
string parameters. I'm not sure why this matters so much. However if
you really don't want to do that then you explicitly need to keep your
state on server side most typically using SessionVar-s. Write your
state in a SessionVar before redirect and read it in your snippets
for /show template.
I proposed the above solution because it is way cleaner IMO and the
redirect function is automatically cleaned up ;)
> Cheers,
> Sergey
>
> On Fri, Jan 30, 2009 at 10:40 AM, Marius <marius.dan...@gmail.com> wrote:
>
> > On Jan 30, 9:36 am, Marius <marius.dan...@gmail.com> wrote:
> > > On Jan 29, 10:54 pm, Sergey Andreev <andser...@gmail.com> wrote:
>
> > > > Hi Liftlers,
> > > > I am migrating one of my application to the lift as a way to learn it
> > and i
> > > > would like to ask a question.
>
> > > > After submitting a form i would like to do a redirect and show the
> > submitted
> > > > values on the other template. I have 2 templates and i use the same
> > snippet
> > > > in both of them to render a dynamic content.
> > > > As far as i understand there are 2 ways to make it work: saving state
> > using
> > > > SessionVars(which works for me) or extending StatefulSnippet and
> > calling
> > > > this.redirectTo on it (looking at the sources it should register the
> > > > stateful snippet in the session). I've tried extending StatefulSnippet
> > but
> > > > it doesn't work for me. A hashed value is added to the redirect url
> > which
> > > > should map to the stateful snippet but the state is lost. I don't
> > understand
> > > > what i am doing wrong.
>
> > > > The simplified example of the code:
>
> > > > class MySnippet extend StatefulSnippet {
> > > > private var myValues: List[String] = List()
>
> > > > val dispatch.. = {
> > > > case "save" => save_
> > > > case "show" => show _
> > > > }
>
> > > > def show = {
> > > > myValues.foreach(Log.info(_)) //nothing here
> > > > }
>
> > > > def save(xhtml: NodeSeq) : NodeSeq = {
> > > > def processForm = {
> > > > myValues.foreach(Log.info(_)) //submitted values are printed out
> > > > this.redirectTo("/show")
> > > > }
>
> > > Unless I'm missing something I do not this your values can be shown in
> > > the new template. There is an overloaded S.redirectTo where you can
> > > specify a function to be executed when the redirect is receives. Hence
> > > here you can pass state. See
>
> > > def redirectTo[T](where: String, func: () => Unit): T
>
> > > In this function you could probably set some RequestVar holding your
> > > needed state and when you snippet is rendered in the /show page you
> > > just read the info from these RequestVar(s).
>
> > To me more specific I was referring to something like:
>
> > def myFunc(state: List[String])() { // a curried function
>
> > // here set the state on a RequestVar
>
> > }
>
> > from you submit function call:
>
> > S.redirectTo("/show", myFunc(myValues) _)
>
> > > > bind("render", xhtml,
> > > > ...... //render textboxes and register functions which add
> > values to
> > > > the myValues list
> > > > "submit" -> submit("Submit", processForm)
> > > > }
>
> > > > }
>
> > > > Thanks,
> > > > Sergey
> > > > P.S. The more i learn about Lift the more i like it. Thank you David
> > and all
> > > > lift committers!!!
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