def get_some_file(path):
subdirs, files = field.storage.listdir(path)
if files:
result_file = random.choice(files)
instance = field.storage.open("%s/%s" % (path, result_file)).file
out = FieldFile(instance, field, result_file)
out.width = 100
out.height = 100
return out
for subdir in subdirs:
result = get_some_file("%s/%s" % (path, subdir))
if result:
return result
