[Zope] Testing if an image exists

[Phil Harris]

Michael,

Try something like, untested but looks good to me:

<dtml-with logos>
<dtml-if "_['logo'] in objectIds(['Image'])">
  <dtml-var "_.getitem(_['logo'])">
</dtml-if>
</dtml-with>

hth

Phil
----- Original Message -----
From: "Michael Fox" <michael@centurysoftware.com.au>
To: <zope@zope.org>
Sent: Wednesday, May 23, 2001 2:01 AM
Subject: [Zope] Testing if an image exists


> Hello,
>
> I have a folder called 'logos' which contains several images, and a
session
> variable called 'logo'.
>
> I need to test if my session variable 'logo' matches the ID of an image
> object in my 'logos' folder.
>
> eg. I have an image in my 'logos' folder called 'mylogo' and the value of
my
> session variable is 'mylogo'.
>
> So far I've come up with this dtml, which doesn't seem to work..
>
> <dtml-with logos>
>   <dtml-if _['logo']>
>     <img src="logos/<dtml-var logo>">
>   <dtml-else>
>     no logo to display
>   </dtml-if>
> </dtml-with>
>
> Has anyone had a similar need as above? can this be done?
>
> Regards,
>
> Michael Fox
>
>
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