def storeScale(self, instance, scale, **data):
""" store a scaled version of the image """
image = ImageScale(**data)
field = self.context
field.getStorage(instance).set(image.getId(),
instance,
image,
mimetype=image.content_type,
filename=image.filename)
def make(self, info):
""" instantiate an object implementing `IImageScale` """
mimetype = info['mimetype']
info['content_type'] = mimetype
info['filename'] = self.context.getFilename()
scale = ImageScale(info['uid'], **info)
scale.size = len(scale.data)
url = self.context.absolute_url()
extension = mimetype.split('/')[-1]
scale.url = '%s/@@images/%s.%s' % (url, info['uid'], extension)
return scale