edit.py 文件源码

def get_success_url(self):
        if self.success_url:
            # force_text can be removed with deprecation warning
            self.success_url = force_text(self.success_url)
            if PERCENT_PLACEHOLDER_REGEX.search(self.success_url):
                warnings.warn(
                    "%()s placeholder style in success_url is deprecated. "
                    "Please replace them by the {} Python format syntax.",
                    RemovedInDjango110Warning, stacklevel=2
                )
                return self.success_url % self.object.__dict__
            else:
                return self.success_url.format(**self.object.__dict__)
        else:
            raise ImproperlyConfigured(
                "No URL to redirect to. Provide a success_url.")