[Zope] dtml-if fustration!
Greg Conway
greg@gmlnt.com
Sun, 25 Aug 2002 18:59:30 +0100
Hi Ausum,
The variable in question is as follows...
REQUEST.CustomLinkVars contains ['SelectStudentID']
and all the other vars in the code snippet are initialised within the loop.
Hope this sheds more light on it!
Regards,
Greg
>> -----Original Message-----
>> From: Ausum Studio [mailto:ausum_studio@hotmail.com]
>> Sent: 25 August 2002 18:49
>> To: Greg Conway
>> Subject: Re: [Zope] dtml-if fustration!
>>
>>
>> Please send me examples of the content of the variables involved.
>>
>>
>> Ausum
>>
>>
>> ----- Original Message -----
>> From: "Greg Conway" <greg@gmlnt.com>
>> To: "Ausum Studio" <ausum_studio@hotmail.com>
>> Sent: Sunday, August 25, 2002 12:38 PM
>> Subject: RE: [Zope] dtml-if fustration!
>>
>>
>> > Hi Ausum,
>> >
>> > Thanks, but (!!) the problem with that is that the value
>> 'SelectStudentID'
>> > is still hard-coded in!
>> >
>> > I have tried modifying it as follows...
>> >
>> > <dtml-in "REQUEST.CustomLinkVars">
>> > <dtml-let Counter=sequence-index>
>> > <dtml-let OuterVar=sequence-item>
>> >
>> > <dtml-if "_.hasattr(REQUEST.CustomLinkVars[Counter],
>> OuterVar) and
>> > REQUEST.CustomLinkVars[Counter].getattr(REQUEST,OuterVar) is not None">
>> >
>> > do something when SelectStudentID has any value
>> >
>> > </dtml-if>
>> >
>> > </dtml-let>
>> > </dtml-let>
>> > </dtml-in>
>> >
>> > ...and I also tried....
>> >
>> > <dtml-if "_.hasattr(REQUEST.CustomLinkVars[Counter],
>> OuterVar) and
>> > REQUEST.CustomLinkVars[Counter].OuterVar is not None">
>> >
>> >
>> > but neither work, the code in the middle doesn't get executed
>> using either
>> > of these :(
>> >
>> > any further ideas?
>> >
>> > many thanks.
>> >
>> > regards,
>> >
>> > Greg.
>> >
>> > >> -----Original Message-----
>> > >> From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of
>> Ausum
>> > >> Studio
>> > >> Sent: 25 August 2002 18:20
>> > >> To: zope@zope.org
>> > >> Subject: Re: [Zope] dtml-if fustration!
>> > >>
>> > >>
>> > >> <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.
>> > >> > >> >
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