admin.py 文件源码

def revert(self, request, queryset):
        """
        Admin action to revert a configuration back to the selected value
        """
        if queryset.count() != 1:
            self.message_user(request, _("Please select a single configuration to revert to."))
            return
        target = queryset[0]
        target.id = None
        target.changed_by = request.user
        target.save(action_type='create')
        self.message_user(request, _("Reverted configuration."))
        return HttpResponseRedirect(
            reverse(
                'admin:{}_{}_change'.format(
                    self.model._meta.app_label,
                    self.model._meta.model_name,
                ),
                args=(target.id,),
            )
        )