Question

与this post类似但不同的问题。

Django的新手，我一直在做第一个教程，现在我在第5部分，这是自动化测试。

在按照教程直到“修复Bug”步骤之后，在运行测试时会弹出错误，如下所示：

Creating test database for alias 'default'...
E
======================================================================
ERROR: test_was_published_recently_with_future_question (polls.tests.QuestionModelTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/ian/mysite/polls/tests.py", line 18, in test_was_published_recently_with_future_question
    self.assertIs(future_question.was_published_recently(), False)
AttributeError: 'Question' object has no attribute 'was_published_recently'

----------------------------------------------------------------------
Ran 1 test in 0.000s

FAILED (errors=1)
Destroying test database for alias 'default'...

这是我的代码：

tests.py

import datetime

from django.utils import timezone
from django.test import TestCase

from .models import Question


class QuestionModelTests(TestCase):

    def test_was_published_recently_with_future_question(self):
        """
        was_published_recently() returns False for questions whose pub_date
        is in the future.
        """
        time = timezone.now() + datetime.timedelta(days=30)
        future_question = Question(pub_date=time)
        self.assertIs(future_question.was_published_recently(), False)

models.py

import datetime

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

class Question(models.Model):
    def __str__(self):
        return self.question_text

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

    question_text = models.CharField(max_length=200)
    pub_date = models.DateTimeField('date published')


class Choice(models.Model):
    def __str__(self):
        return self.choice_text

    question = models.ForeignKey(Question, on_delete=models.CASCADE)
    choice_text = models.CharField(max_length=200)
    votes = models.IntegerField(default=0)

Answer 1

您必须 CTRL + D （停止）您的python控制台，然后再次运行python tableView.estimatedRowHeight = 150 tableView.rowHeight = UITableViewAutomaticDimension shell，最后再次全部导入。现在可以使用。

Answer 2

尝试以这种方式对我有帮助

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)
    pub_date = models.DateTimeField('date published')

    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)
# Create your models here.

Answer 3

除非Django在Model类中做一些魔术（最有可能），否则就python而言，带有pub_date属性的Question对象的创建是不确定的。

Answer 4

更改

future_question = Question(pub_date=time)

要

future_question = Question.objects.get(pub_date=time)

Django：对象没有属性'was_published_recently' - 除了它

4 个答案: