files.py 文件源码

def __init__(self, verbose_name=None, name=None, upload_to='', storage=None, **kwargs):
        self._primary_key_set_explicitly = 'primary_key' in kwargs

        self.storage = storage or default_storage
        self.upload_to = upload_to

        kwargs['max_length'] = kwargs.get('max_length', 100)
        super(FileField, self).__init__(verbose_name, name, **kwargs)