[Zope] Problem converting PIL-generated Image objects to Photo 1.2.3 objects

[Jonathan Cyr]

Seems to be a problem with Photo's handling of manipulated Zope Image 
objects...  I moved to a alternative, called VarImage 2.31, different 
but more powerful, escpecially for my needs.

VarImage 2.31 is available at...

http://www.anansispaceworks.com/

VarImage's author made note of handling this problem in 2.3, perhaps 
the Photo product is just getting old, and hasn't kept pace.

Has some great features, axis-flipping, black & white, scaling, 
cropping, etc.   Like I said, different, powerful, and without the error.

-Jon Cyr
cyrj at cyr.info

Jonathan Cyr wrote:
> Hello,
> 
> I am having a problem converting Image objects generated by PIL to Photo 
> objects (rbickers' Photo & Photo Folder 1.23) in Zope 2.7.0.
> 
> The error I get is:
> 
> Error Type: AttributeError
> Error Value: 'str' object has no attribute 'read'
> 
> I am uploading an image into Zope, I am using an External Method & PIL 
>  to standardize the dimensions & format of the image.  The method is 
> extremely similar to the example the the Zope Book example of External 
> Methods & PIL Thumbnail script.  At this point, I'd like to take these 
> homegenous image objects and convert them to Photo objects inside a 
> PhotoFolder and take advantage of the render-on-the-fly sizes.  I'm 
> using RBickers' script image2photo python script, and I get the above 
> error.
> 
> Here's the code for the thumbnails, works fine, Images seem fine, work 
> fine, but wont convert to Photo...
> 
>> def makeThumbnail (self, original_id,  original_title, size=150):
>>     """
>>     Makes a thumbnail image given an image ID when called on a Zope 
>> folder.
>>     Modified for WeddingWeblog from code in the Zope Book, Ch10
>>
>>     The thumbnail is a Zope image object that is a small JPG 
>> representation
>>     of the original image
>>
>>     """
>>
>>     from PIL import Image
>>     from StringIO import StringIO
>>     import os.path
>>
>>     #create a thumbnail image file
>>     original_image=getattr(self, original_id)
>>     original_file=StringIO(str(original_image.data))
>>     image=Image.open(original_file)
>>     image=image.convert('RGB')
>>     image.thumbnail((size,size))
>>     thumbnail_file=StringIO()
>>     image.save(thumbnail_file, "JPEG")
>>     thumbnail_file.seek(0)
>>
>>     #create an ID for thumbnail
>>     path, ext=os.path.splitext(original_id)
>>     thumbnail_id=path + '_' +str(size)
>>
>>     # if there's an existing thumbnail delete it.
>>     if thumbnail_id in self.objectIds():
>>         self.manage_delObjects([thumbnail_id])
>>
>>     # create the Zope Image Object
>>     self.manage_addProduct['OFSP'].manage_addImage(thumbnail_id, 
>> thumbnail_file, title=original_title)
>>     thumbnail_image=getattr(self, thumbnail_id)
>>
> 
> I'm using the Image2Photo script in the Photo/PhotoFolder support, 
> pythonscript:
> 
>> for image in context.objectValues(['Image']):
>>           context.manage_delObjects([image.getId(),], 
>> REQUEST=context.REQUEST)
>>           
>> context.manage_addProduct['Photo'].manage_addPhoto(image.getId(), 
>> image.title, image.data, REQUEST=context.REQUEST)
> 
> 
> I'm not well versed in the object types here...
> 
> any ideas?
> 
> -Jon Cyr
> cyrj at cyr.info
> 
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