Django教程第2部分字段错误

当我试图运行Django第2部分的教程时，出现了一个字段错误。我正在使用Python 3.6和Django 1.11

models.py

import datetime
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
from django.utils import timezone

class Question(models.Model):
    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')

    def __str__(self):
        return self.question_text

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


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

逐步使用教程。我正在运行

python manage.py shell

：

>>> from polls.models import Question, Choice

>>> Question.objects.all()
<QuerySet [<Question: What's up?>]>
>>> Question.objects.filter(id=1)
<QuerySet [<Question: What's up?>]>
>>> Question.objects.filter(question_text__startswith='What')

---

我不知道如何修复此错误，可能是我在模型上出错了，这就是我与您共享

models.py

的原因。我希望你能帮我

在开始之前，你应该有两个下划线

试一试

---

错误明确指出，

startswith

前面没有两个下划线。检查此项。

'question\u text\u startswith'

应该是

'question\u text\u startswith'

谢谢，我在那里呆了一会儿：）

django.core.exceptions.FieldError: Cannot resolve keyword 'question_text_startswith' into field. Choices are: choice, id, pub_date, question_text

Question.objects.filter(question_text__startswith='What')