django/db/models/fields/related_descriptors.py 上的 Django 1.9.6 Keyrror `manager`，第 505 行

Question

比方说，我遵循这样的 Django 模型设置：

@python_2_unicode_compatible
class Question(models.Model):
    question_text = models.CharField(max_length=300)
    pub_date = models.DateTimeField('date published')

    def __str__(self):
        return self.question_text

@python_2_unicode_compatible
class Choice(models.Model):
    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

    def __str__(self):
        return self.choice_text

所以当我尝试在 Django 中执行这些操作时 shell

q = Question.objects.get(pk=1)
q.choice_set().all()

它没有返回空或任何东西，而是简单地出错并显示以下消息：

Traceback (most recent call last):
File "<console>", line 1, in <module>
File "/path/to/my/djangoproject/lib/python3.4/site-packages/django/db/models/fields/related_descriptors.py", line 505, in __call__
manager = getattr(self.model, kwargs.pop('manager'))
KeyError: 'manager'

我试过使用

q.choice_set()

但是没有，同样的错误。任何帮助将不胜感激。

Answer 1

应该是q.choice_set.all()

q = Question.objects.get(pk=1)
q.choice_set.all()

django/db/models/fields/related_descriptors.py 上的 Django 1.9.6 Keyrror `manager`，第 505 行

Django 1.9.6 Keyrror `manager` on django/db/models/fields/related_descriptors.py, Line 505

django

django-models

keyerror