class Tester(db.Document): image = ImageField(fs=storage, max_size=100, optimize=True)
class Tester(db.Document): image = ImageField(fs=storage, basename=lambda o: 'prefix/filename')
class Tester(db.Document): image = ImageField(fs=storage, upload_to=lambda o: upload_to)
class Tester(db.Document): image = ImageField(fs=storage, max_size=max_size)
class Tester(db.Document): image = ImageField(fs=storage, thumbnails=sizes) image2 = ImageField(fs=storage)
class Tester(db.Document): image = ImageField(fs=storage)