def create_thumbnails(self):
"""
Crear los thumbnails para todas dimensiones
"""
initial = log_time("create_thumbnails")
sizes = sorted(self.sizes.items(), key=lambda x: x[1][0], reverse=True)
last = None
for name, dimension in sizes:
self.create_thumbnail(name, last=last)
last = name
assert self.thumbnail_exists(name)
log_time("end create_thumbnails", initial=initial)
def create_thumbnail(self, size, last=None):
"""
Crea el thumbnail para el tamaño *size*.
"""
initial = log_time("thumbnail: %s" % size, indent=4)
# Abrimos la imagen
try:
name = self.image.name if last is None else \
self.thumbnail_name(last)
data = self.image.storage.open(name, 'rb').read()
img = Image.open(StringIO(data))
except IOError, e:
logging.error('IOError: %s ' % e)
return
# Generamos el thumbnail
thumb = method.generate(img, width, height)
if thumb is not None:
thumb_file = ContentFile(thumb.getvalue())
else:
thumb_file = ContentFile(data)
# Escribimos el thumbnail en el disco
name = self.thumbnail_name(size)
if self.image.storage.exists(name):
self.image.storage.delete(name)
self.image.storage.save(name, thumb_file)
log_time("end thumbnail", initial=initial, indent=4)
def thumbnail_url(self, size):
"""
Retorna el url del thumbnail de tamaño *size*
"""
return self.image.storage.url(self.thumbnail_name(size))
def thumbnail_basepath(self):
"""
Retorna el path donde se almacena el thumbnail.
"""
return getattr(settings, 'THUMBNAIL_STORAGE_DIR', self.basepath)
def thumbnail_name(self, size):