def post(self):
album_key = ndb.Key(urlsafe=self.request.get('key'))
if album_key is not None:
previous_thumbnails = Thumbnail.query(ancestor=album_key).fetch()
for previous_thumbnail in previous_thumbnails: # should be one of these at most.
previous_thumbnail_key = ndb.Key(urlsafe=previous_thumbnail.ukey())
previous_thumbnail_key.delete()
upload_files = self.get_uploads() # 'file' is file upload field in the form
blob_info = upload_files[0]
thumbnail = Thumbnail(parent=album_key, image_blob=blob_info.key())
thumbnail.populate(serving_url=images.get_serving_url(blob_info.key()))
thumbnail.put()
album = album_key.get()
album.thumbnail_serving_url = thumbnail.serving_url
album.put()
album_key = ndb.Key(urlsafe=self.request.get('key')) # No idea why I have to add this line in again
self.redirect('/add-album?key=%s' % album_key.urlsafe())
else:
#raise some error here.
self.redirect('/')
