Hi Dieter Thank you for your help! But it looks like I really have kind of a problem. I write a bit more about it, cause may you or someone else have a Idea for a solution. I'm working on a website where we are a bit short of time ... (surprise surprise ..;) ) And so I'm developing during other people already have started to enter data. (that's what you never should do - but with a don't get any money project - all volontiers - wrong communication ... ) So I can't really redesign the structure. The hole site is based on ZClasses. Most of them are folderish. The attributes contain text (different attributs for different semantic). There is also a Class for external links (a href ..). (It's nice to control them in one place) Now I'm looking for a userfriendly possibility to access the information of this "links" out of the content attributes of the other Instances. Sounds easy, isn't it ;) ... Well, if anybody has a idea ... Your help would be welcome thanks Stefan PS.: dokumentation / I haven't read all of it, but I studied a lot on www.zope.org / not word by word but problem orientated ... your link was new for me URL:http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html I will have a look, tomorrow - now I'm getting a bit tired and I have 3hours drive befor I can go to bed ... this is a lovely project ;) ... ----- Original Message ----- From: "Dieter Maurer" <dieter@handshake.de> To: "Stefan Mallepell" <steve@syso.ch> Cc: <zope@zope.org> Sent: Tuesday, April 17, 2001 10:19 PM Subject: Re: [Zope] [newbie] Property with <dtml-var> in it's value

Stefan Mallepell writes:

...

Was just a bit surprised and haven't found anything about this on zope.org ....

Can anyone tell me how I can make that a <dtml-var xxxx> which is stored in a Property of a ZClass instance, will be "processed" when I reference it in a dtml method. The property is from type "text" and there is normal text in front and after the dtml-var statement. Did you already read the available documentation? the Zope book and

URL:http://www.dieter.handshake.de/pyprojects/zope/book/chap3.html

Never mind. If I understand you right, then you want to do difficult things:

Do you want to have something like a "computed property", say "title= 'What a great time <dtml-var ZopeTime>'"? This title would be different, each time it will be accessed because the time component would change.

Properties are not designed for that! They are mappings of names to values of simple types: string, integer, lists, dates... nothing complex.

The easiest way to emulate "computed" properties is to use a folderish ZClass that uses DTML objects or Python Scripts (External Methods) as property emulation.

There are more difficult solutions that wrap convert property values into DTML objects and then render them....

Dieter

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