#3 修正

models.py

@@ -46,7 +46,7 @@ class Query (Model):
     def answer_histories (
             self,
     ) -> list[Answer]:
-        return [x.answer for x in self.has_many (QueryAnswerHistory)]
+        return [x.answer for x in self.has_many (QueryAnswerHistory).get ()]
 
 
 class QueryAnswerHistory (Model):