serializers.py 文件源码

def get_cached_form(self, data=None):
        if hasattr(self, "_form"):
            return self._form

        form_class = self.form_class
        if form_class:
            setattr(self, "_form", form_class(
                data,
                instance=self.instance if isinstance(self.instance, Model) \
                    else None)
            )
            return self._form

        return None