Hi Ebbe, b/ Once you have figured out a 'test' for the existence of the picture file, you can write something like: <dtml-in list_of_Pictures> <dtml-if test> <dtml-call "REQUEST.set('tempPict', _['sequence-item'][0])"> <dtml-else> <dtml-call "REQUEST.set('tempPict', dummyPicture)"> </dtml-if> ... here you show the metadata and tempPict ... </dtml-in> providing that 'list_of_Pictures' is the full list you must show and sequence-item is the list containing the picture itself and metadata of your picture. a/ if the picture has a correspondent thumbnail in Zope, you can test by size (if is >0 ) or by content_type (if it's not 'application/octet-stream'). My suggestion is to make Zope objects for all the images and to keep an extra Boolean property of the Zope object like 'has_largerImage'. If not, it depends on how you keep the picture in a database: the file you probably keep in a blob. If the blob is on the same record with the metadata (which is not recommended), you should have at list a field like 'content_type' or 'size' that you can test. If you have the blob in a separate table, it's fine, since you have a filed saying what's the id of the record from the other table a, let's say, 0 for nothing. Tell me if that solves the problem Cheers, Miruna || -----Original Message----- || From: zope-admin@zope.org [mailto:zope-admin@zope.org] On Behalf Of Ebbe || Kvist || Sent: Friday, October 25, 2002 3:17 AM || To: zope@zope.org || Subject: [Zope] showing images || || Hi all, || || I am starting to figure out things about Zope. And to this problem I have || not yet figured out an answer: || I have a lot of metadata about photos stored in a MySQL database. I have || developed a Zope interface to show the metadata per picture using Zope || and it works fine. I store small thumbnails in Zope for some, but not all || the pictures. The thumbnail files have the same id as the MySQL variable || idnumber which I show on the screen together with other metadata. || My problem is that I cant figure out how to || || a/ test if there is a thumbnail file for the idnumber variable and || b/ if so - show it together with the metadata - and if not - show a dummy || picture instead || || I have tried many things but it seems impossible to have Zope test if the || contents of the <dtml-var idnumber> variable can be used to check the || exsitence of a possible thumbnail file with the same name. || || Is there a solution? || || Best regards from sunny but rather cold Stockholm, || Ebbe || || || _____________________________________________________________ || Här börjar internet! || Skaffa gratis e-mail och gratis internet på Spray http://www.spray.se ||