AttributeErrorについて

Question

Djangoまとめを参考にしてdjangoのAPIを叩くところまで進んだのですが、q.choice_set.all()というコマンドを叩いたら↓↓というエラーが吐かれました。どうかご助力お願い出来ますでしょうか。

Traceback (most recent call last):
  File "<console>", line 1, in <module>
AttributeError: 'Question' object has no attribute 'choice_set'

コマンドプロンプト

>>> from polls.models import Choice, Question

# Make sure our __str__() addition worked.
>>> Question.objects.all()
<QuerySet [<Question: What's up?>]>

# Django provides a rich database lookup API that's entirely driven by
# keyword arguments.
>>> Question.objects.filter(id=1)
<QuerySet [<Question: What's up?>]>                                          
>>> Question.objects.filter(question_text__startswith='What')
<QuerySet [<Question: What's up?>]> 

# Get the question that was published this year.
>>> from django.utils import timezone
>>> current_year = timezone.now().year
>>> Question.objects.get(pub_date__year=current_year)
<Question: What's up?>

# Request an ID that doesn't exist, this will raise an exception.
>>> Question.objects.get(id=2)
Traceback (most recent call last):
    ...
DoesNotExist: Question matching query does not exist.

# Lookup by a primary key is the most common case, so Django provides a
# shortcut for primary-key exact lookups.
# The following is identical to Question.objects.get(id=1).
>>> Question.objects.get(pk=1)
<Question: What's up?> 

# Make sure our custom method worked.
>>> q = Question.objects.get(pk=1)
>>> q.was_published_recently()
True

# Give the Question a couple of Choices. The create call constructs a new
# Choice object, does the INSERT statement, adds the choice to the set
# of available choices and returns the new Choice object. Django creates
# a set to hold the "other side" of a ForeignKey relation
# (e.g. a question's choice) which can be accessed via the API.
>>> q = Question.objects.get(pk=1)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
AttributeError: 'Question' object has no attribute 'choice_set'
>>> 
# Display any choices from the related ob

polls/models.py

import datetime

from django.db import models
from django.utils import timezone


class Question(models.Model):
    question_text = models.CharField(max_length=200)#質問文
    pub_date = models.DateTimeField('date published')#公開日

    def __str__(self):
        return self.question_text

    def was_published_recently(self):
        return self.pub_date >= timezone.now() - datetime.timedelta(days=1)

class Choice:
    question = models.ForeignKey(Question, on_delete=models.CASCADE)#質問文の読み込み
    choice_text = models.CharField(max_length=200)#質問に対する選択肢
    votes = models.IntegerField(default=0)#投票数

    def __str__(self):
        return self.choice_text
# Create your models here.

polls/admin.py

from django.contrib import admin
from .models import Question

admin.site.register(Question)
# Register your models here.

todo/models.py

from django.db import models

class Post(models.Model):
    body = models.CharField(max_length=200)
# Create your models here.

todo/admin.py

from django.contrib import admin
from .models import Question

admin.site.register(Question)
# Register your models here.

Comments

[Orlofsky]

URLは https://teratail.com/help/question-tips#questionTips3-7 の [リンク] に修正してください。

[m.ts10806]

Questionはテーブルでしょうか？
テーブル定義やサンプルデータがわかる情報をご提示ください。

Answer 1

'Question' オブジェクトには'choice_set'というアトリビュートはありません
というエラーですね。
どこにそれは書かれてるんでしょう

Comments

[ingramzero]

'Question'オブジェクトには確かに'choice_set'というアトリビュートは定義されていませんでした....

ただ、<Query Set[]>の値が返ってきていました。
ディレクトリもディレクトリの中身も何度も確認しましたが参考サイトとの差異はありませんでした。