files.py 文件源码

def deconstruct(self):
        name, path, args, kwargs = super(FileField, self).deconstruct()
        if kwargs.get("max_length") == 100:
            del kwargs["max_length"]
        kwargs['upload_to'] = self.upload_to
        if self.storage is not default_storage:
            kwargs['storage'] = self.storage
        return name, path, args, kwargs