FW: [Zope] dtml-if fustration!
Greg Conway
greg@gmlnt.com
Sun, 25 Aug 2002 19:31:11 +0100
forget that, it doesn't work when called without the variable in the request
:(
any other knowledgeable zope soul out there fancy taking pity on a
struggling newbie?
many thanks!!
Regards,
Greg.
>> -----Original Message-----
>> From: zope-admin@zope.org [mailto:zope-admin@zope.org]On Behalf Of Greg
>> Conway
>> Sent: 25 August 2002 19:20
>> To: Ausum Studio
>> Cc: Zope@Zope. Org
>> Subject: RE: [Zope] dtml-if fustration!
>>
>>
>> Hi Ausum,
>>
>> You've helped me enough.... using the code you sent me before I
>> continued to
>> play, and this seems to work...
>>
>> (not extensively tested as yet though, but looks good!!)
>>
>> <dtml-if "_.getattr(REQUEST,OuterVar) is not None">
>>
>> so many many thanks!!
>>
>> and yes, you're right, and it would probably be faster in python as well,
>> but that's for another day... :)
>>
>> regards,
>>
>> Greg.
>>
>> >> -----Original Message-----
>> >> From: Ausum Studio [mailto:ausum_studio@hotmail.com]
>> >> Sent: 25 August 2002 19:13
>> >> To: Greg Conway
>> >> Subject: Re: [Zope] dtml-if fustration!
>> >>
>> >>
>> >> Hello again, Greg. I'd really like to help you, as I have
>> >> struggled myself
>> >> with DTML at its moment. But I need a whole case explanation.
>> I'm a bit
>> >> confused trying to understand what you need, from the code
>> you've posted.
>> >>
>> >> At the end, you'll see how easy it woud've been to use a python script
>> >> instead. :)
>> >>
>> >>
>> >> Ausum
>> >>
>> >>
>> >> p.s. Don't need to follow this thread in the list.
>> >>
>> >>
>> >> ----- 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 12:59 PM
>> >> Subject: RE: [Zope] dtml-if fustration!
>> >>
>> >>
>> >> > 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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>> >> > >> > >> > >> > Thank you.
>> >> > >> > >> > >> >
>> >> > >> > >> > >> > _______________________________________________
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