storage.py 文件源码

def get_available_name(self, name, max_length=None):
        if max_length and len(name) + 41 > max_length:
            raise SuspiciousFileOperation(
                'Storage can not find an available filename for "%s". '
                'Please make sure that the corresponding file field '
                'allows sufficient "max_length".' % name
            )
        return name