Looks like I have a problem. I want to compute field like this and it
works FINE:
Field('logo_small','upload',writable=False,readable=False,widget=uploadWidget,compute=lambda
r: THUMB(r)),
def THUMB(r):
try:
image=r['logo']
except:
#yes, None is deleting my thumbnail
return None
from PIL import Image
import os
im = Image.open(request.folder + 'uploads/' + image)
maxheight=50
maxwidth=100
xsize, ysize = im.size
ratio=min(maxwidth/float(xsize), maxheight/float(ysize))
newxsize=int(xsize*ratio)
newysize=int(ysize*ratio)
im=im.resize((newxsize, newysize), Image.ANTIALIAS)
root,ext = os.path.splitext(image)
thumb='%s_thumb%s' %(root, ext)
im.save(request.folder + 'uploads/' + thumb)
return thumb
But there is a problem with this behaviour. When I do somewhere else
db(db.product.id==id).update(somefield="",someother="")
AND LIST OF FIELDS UPDATED DOES NOT CONTAIN LOGO FIELD
it is throwing exception - understandable
what should I write in my code in the exception
or should we change that?
like somehow disable compute in the update statement
--
Kuba
