[Zope] Using PIL in zope product

[Jonathan Cyr]

FYI,

Photo and Photo Folder seem to have a problem with PIL-generated image 
data... ie. creating a photo object with data processed by PIL.

My answer was to use VarImage instead, seems to be more closely related 
to Zope's Image object, and can receive Zope data as you think it would.

Also, There's a simple script tutorial on using PIL in the Zope Book, I 
think it's under external python scripting.

-Jon



Garito wrote:

> Did you know Photo and Photo folder product?
>
>
> John Schinnerer wrote:
>
>> Hello,
>>
>> I am developing an art-gallery type of product, with images of artworks
>> stored as zope Image objects within a folderish product instance.
>>
>> When a new gallery item instance is created, or when the Image object
>> in an existing instance is changed, I want to auto-generate a thumbnail
>> of the image (using PIL) and store it also as a zope Image object.
>>
>> In manage_addAction for example I have this:
>> ...
>> imgfile = REQUEST.image_file
>>     if imgfile and imgfile.filename != '':
>>         newObjId.manage_addImage('art_piece', imgfile, newObjId.title)
>>         newObjId.manage_addImage('art_piece_thumb', makeThumb(imgfile),
>> newObjId.title) ...
>>
>> and here is makeThumb (using PIL):
>>
>> def makeThumb(imagefile):
>>     "create thumbnail image from full-size art_piece image"
>>     img = Image.open(imagefile)
>>     thumb = img.thumbnail((111,111), Image.ANTIALIAS)
>>     return thumb
>>
>> I get a zope error triggered by the line
>>
>> img = Image.open(imagefile)
>>
>> like this:
>>
>> Error Type: AttributeError
>> Error Value: FileUpload instance has no attribute '__getitem__'
>> (traceback further below if helpful)
>>
>> So apparently there is some problem with trying to use the image file
>> passed in the request with the PIL functions...it's not a "real" file
>> or at least doesn't have some attributes that PIL is expecting to find,
>> or something like that.
>>
>> Is there a simple way around this the way I'm trying to do it?
>>
>> If not, how else could I try to get the same result (a zope Image
>> object thumbnail image created from the 'full size' image being
>> uploaded in the request)?
>>
>> thanks,
>> John S.
>> ---------------
>>
>> Traceback (innermost last):
>>  File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 150, in
>> publish_module
>>  File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 114, in
>> publish
>>  File /usr/lib/zope/lib/python/Zope/__init__.py, line 159, in
>> zpublisher_exception_hook
>>    (Object: bg)
>>  File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 98, in
>> publish
>>  File /usr/lib/zope/lib/python/ZPublisher/mapply.py, line 88, in
>> mapply
>>    (Object: add_GTIGalleryItem)
>>  File /usr/lib/zope/lib/python/ZPublisher/Publish.py, line 39, in
>> call_object
>>    (Object: add_GTIGalleryItem)
>>  File /usr/lib/zope/lib/python/Shared/DC/Scripts/Bindings.py, line
>> 252, in __call__
>>    (Object: add_GTIGalleryItem)
>>  File /usr/lib/zope/lib/python/Shared/DC/Scripts/Bindings.py, line
>> 283, in _bindAndExec
>>    (Object: add_GTIGalleryItem)
>>  File /usr/lib/zope/lib/python/Products/PythonScripts/PythonScript.py,
>> line 302, in _exec
>>    (Object: add_GTIGalleryItem)
>>    (Info: ({'script': <PythonScript instance at 892f4c0>,
>> 'context': <Folder instance at 8988608>, 'container': <Folder
>> instance at 8b8d860>, 'traverse_subpath': []}, (), {}, None))
>>  File Script (Python), line 11, in add_GTIGalleryItem
>>  File
>> /usr/lib/zope/lib/python/Products/GTIGalleryItem/GTIGalleryItem.py,
>> line 98, in manage_addAction
>>  File
>> /usr/lib/zope/lib/python/Products/GTIGalleryItem/GTIGalleryItem.py,
>> line 71, in makeThumb
>>  File /usr/lib/python2.1/site-packages/PIL/Image.py, line 984, in open
>>  File /usr/lib/zope/lib/python/App/ImageFile.py, line 35, in __init__
>>  File /usr/lib/python2.1/posixpath.py, line 48, in join
>> AttributeError: (see above)
>>
>>
>>
>>
>>        
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