[Zope] Re: CMFBTreeFolder Behavior

[David Pratt]

Many thanks Jens for this advice. It is much appreciated.

Regards,
David

On Monday, February 28, 2005, at 12:55 PM, Jens Vagelpohl wrote:

>
> On Feb 28, 2005, at 17:15, David Pratt wrote:
>> When images come into the uploads folder, I am resizing each into 3 
>> sizes using PIL and moving this data into an external file type to 
>> store file on the filesystem and discarding the original file.  I 
>> have this working except images are not processed immediately when 
>> they come into uploads folder - so I was looking to cronning to see 
>> if anything is in the uploads folder each 15 or 30 min.
>
> The behavior you see is simple to explain. Your problem is that you 
> are mutating the list of items as you go through it - always a bad 
> idea. Try something like this:
>
> ids = list(folder.objectIds())  # This creates a *copy* of all IDs
>
> for id in ids:
> 	ob = folder._getOb(id)
> 	<do stuff with ob>
>
> jens
>
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