[Lift] Re: Is it legal to update a SessionVar in LiftRules.rewrite?
Ok, makes sense. I'll use a RequestVar instead.
thanks!
alex
On Sat, Feb 7, 2009 at 9:07 PM, David Pollak
wrote:
> Alex,
> The session is not in scope during the rewrite phase, so SessionVars are
> not available. This is because the rewrite happens before dispatching
> begins and dispatching can be done to a stateless/sessionless dispatch.
>
> However, the default value of a SessionVar is not calculated until the
> SessionVar is accessed, so in your example, if you are accessing the
> SessionVar during normal response handling, the statement will evaluate
> correctly.
>
> Hope this helps.
>
> Thanks,
>
> David
>
>
> On Sat, Feb 7, 2009 at 8:44 PM, Alex Boisvert wrote:
>
>> On Sat, Feb 7, 2009 at 6:59 PM, Alex Boisvert wrote:
>>
>>> object Session {
>>> object foo extends RequestVar[Int](S.param("foo").map(_.toInt) openOr
>>> (1))
>>> }
>>
>>
>> Sorry, I made a typo here.. it should read:
>>
>> object foo extends SessionVar[Int](S.param("foo").map(_.toInt) openOr
>> (1))
>> ^^
>>
>> alex
>>
>>
>>
>>
>
>
> --
> Lift, the simply functional web framework http://liftweb.net
> Beginning Scala http://www.apress.com/book/view/1430219890
> Follow me: http://twitter.com/dpp
> Git some: http://github.com/dpp
>
> >
>
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[Lift] Re: Is it legal to update a SessionVar in LiftRules.rewrite?
Alex,
The session is not in scope during the rewrite phase, so SessionVars are not
available. This is because the rewrite happens before dispatching begins
and dispatching can be done to a stateless/sessionless dispatch.
However, the default value of a SessionVar is not calculated until the
SessionVar is accessed, so in your example, if you are accessing the
SessionVar during normal response handling, the statement will evaluate
correctly.
Hope this helps.
Thanks,
David
On Sat, Feb 7, 2009 at 8:44 PM, Alex Boisvert wrote:
> On Sat, Feb 7, 2009 at 6:59 PM, Alex Boisvert wrote:
>
>> object Session {
>> object foo extends RequestVar[Int](S.param("foo").map(_.toInt) openOr
>> (1))
>> }
>
>
> Sorry, I made a typo here.. it should read:
>
> object foo extends SessionVar[Int](S.param("foo").map(_.toInt) openOr
> (1))
> ^^
>
> alex
>
>
> >
>
--
Lift, the simply functional web framework http://liftweb.net
Beginning Scala http://www.apress.com/book/view/1430219890
Follow me: http://twitter.com/dpp
Git some: http://github.com/dpp
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[Lift] Re: Is it legal to update a SessionVar in LiftRules.rewrite?
On Sat, Feb 7, 2009 at 6:59 PM, Alex Boisvert wrote:
> object Session {
> object foo extends RequestVar[Int](S.param("foo").map(_.toInt) openOr
> (1))
> }
Sorry, I made a typo here.. it should read:
object foo extends SessionVar[Int](S.param("foo").map(_.toInt) openOr (1))
^^
alex
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