[Zope] dtml-if fustration!

[Ausum Studio]

<dtml-if "REQUEST.StoredVar.has_key('SelectStudentID') and
REQUEST.StoredVar.SelectStudentID is not None">
    do something when SelectStudebtID has any value
</dtml-if>

or

<dtml-if "_.hasattr(REQUEST.StoredVar, 'SelectStudentID') and
REQUEST.StoredVar.SelectStudentID is not None">
    do something when SelectStudebtID has any value
</dtml-if>

Ausum



----- Original Message -----
From: "Greg Conway" <greg@gmlnt.com>
To: "Ausum Studio" <ausum_studio@hotmail.com>
Cc: "Zope@Zope. Org" <zope@zope.org>
Sent: Sunday, August 25, 2002 11:24 AM
Subject: RE: [Zope] dtml-if fustration!


> Hi Ausum,
>
> Thanks for the reply. What I actually mean is - the name of the variable I
> want the value of is stored inside another variable, in the request.
>
> For example...
>
> REQUEST.StoredVar[1] contains SelectStudentID
>
> and I want to perform a dtml-if condition based on whether SelectStudentID
> contains a value or not!
>
> So to get this value I perform a '_.getattr(REQUEST,StoredVar[1])'
command.
>
> But I cannot seem to do this within a <dtml-if ... > statement, it throws
up
> an error if the variable does not exist, presumably because I'm trying to
> work through an extra layer of variables....
>
> just to make life complicated :)
>
> hope this is now clearer, any help much appreciated!
>
> Regards,
>
> Greg.
>
> >> -----Original Message-----
> >> From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of
Ausum
> >> Studio
> >> Sent: 24 August 2002 18:39
> >> To: zope@zope.org
> >> Subject: Re: [Zope] dtml-if fustration!
> >>
> >>
> >> What is the "next pass"?. Do you mean within the same page?
> >> If so, you don't need to declare the variable, as long as it's
> >> been already
> >> defined for the whole page. Just use <dtml-var SelectSID> anywhere.
> >>
> >> Now, if you need to change its value, and then use it on the remaining
> >> portion on the rendered page, the anwser is the same, use <dtml-var
> >> SelectSID>. You don't need to use the "REQUEST.SelectSID" part.
> >>
> >>
> >> Ausum
> >>
> >>
> >> ----- Original Message -----
> >> From: "Greg Conway" <greg@gmlnt.com>
> >> To: "Zope@Zope. Org" <zope@zope.org>
> >> Sent: Saturday, August 24, 2002 11:56 AM
> >> Subject: [Zope] dtml-if fustration!
> >>
> >>
> >> > Hi all,
> >> >
> >> > I have a fustrating problem with dtml-if's!! I've tried to
> >> work round it
> >> in
> >> > many ways, but there is probably an easy one I am overlooking
> >> knowing my
> >> > luck...
> >> >
> >> > Anyway... Consider the following dtml-if statement:
> >> >
> >> >     <dtml-if SelectSID>
> >> >       SelectSID = <dtml-var SelectSID>
> >> >       <dtml-call "REQUEST.set('SelectSID', SelectSID)">
> >> >     </dtml-if>
> >> >
> >> > This works okay, and stores the variable SelectSID in the
> >> request for the
> >> > code to pick up again on it's next pass.
> >> >
> >> > However, on the next pass, the variable SelectSID doesn't exist! As
the
> >> > variable is now REQUEST.SelectSID - and the following code doesn't
> >> work....
> >> >
> >> >     <dtml-if "REQUEST.SelectSID">
> >> >       SelectSID = <dtml-var SelectSID>
> >> >       <dtml-call "REQUEST.set('SelectSID', REQUEST.SelectSID)">
> >> >     </dtml-if>
> >> >
> >> > ...as an error is thrown up if REQUEST.SelectSID doesn't exist!
> >> >
> >> > Anybody got a simple answer to my dilemma?!!
> >> >
> >> > Many thanks for any help!
> >> >
> >> > Regards,
> >> >
> >> > Greg Conway.
> >> >
> >> > This electronic transmission and any files attached to it are
strictly
> >> > confidential and intended solely for the addressee. If you are not
> >> > the intended addressee, you must not disclose, copy or take any
action
> >> > in reliance of this transmission. If you have received this
> >> > transmission in error, please notify us by return and delete the
same.
> >> > Further enquiries/returns can be posted to postmaster@gmlnt.com
> >> > Thank you.
> >> >
> >> > _______________________________________________
> >> > Zope maillist  -  Zope@zope.org
> >> > http://lists.zope.org/mailman/listinfo/zope
> >> > **   No cross posts or HTML encoding!  **
> >> > (Related lists -
> >> >  http://lists.zope.org/mailman/listinfo/zope-announce
> >> >  http://lists.zope.org/mailman/listinfo/zope-dev )
> >> >
> >>
> >> _______________________________________________
> >> Zope maillist  -  Zope@zope.org
> >> http://lists.zope.org/mailman/listinfo/zope
> >> **   No cross posts or HTML encoding!  **
> >> (Related lists -
> >>  http://lists.zope.org/mailman/listinfo/zope-announce
> >>  http://lists.zope.org/mailman/listinfo/zope-dev )
>
> This electronic transmission and any files attached to it are strictly
> confidential and intended solely for the addressee. If you are not
> the intended addressee, you must not disclose, copy or take any action
> in reliance of this transmission. If you have received this
> transmission in error, please notify us by return and delete the same.
> Further enquiries/returns can be posted to postmaster@gmlnt.com
> Thank you.
>
> _______________________________________________
> Zope maillist  -  Zope@zope.org
> http://lists.zope.org/mailman/listinfo/zope
> **   No cross posts or HTML encoding!  **
> (Related lists -
>  http://lists.zope.org/mailman/listinfo/zope-announce
>  http://lists.zope.org/mailman/listinfo/zope-dev )
>