Question

我读过关于从测试开始构建程序的内容，所以我想我会试一试。我已经创建了我的初始project和app以及model，但是当我尝试运行测试时，出现“不存在”错误。我已经进行了迁移，在运行测试之前还有更多的事情要做吗？这是我的代码：

models.py

from django.db import models

class Name(models.Model):
    first_name = models.CharField(
        "First Name",
        max_length=100,
        )
    middle_name = models.CharField(
        "Middle Name or Initial",
        max_length=100,
        default='',
        )
    last_name = models.CharField(
        "Last Name",
        max_length=200,
        )


    def __str__(self):
        return f'{self.last_name}, {self.first_name}'

tests.py

from django.test import TestCase

from contacts.models import Name


class TestNameModel(TestCase):
    @classmethod
    def setupTestData(cls):
        Name.objects.create(first_name='Banny', last_name='Banvil')

    def test_name_exists(self):
        name = Name.objects.get(id=1)
        print (name)

我得到的错误：

Creating test database for alias 'default'...
System check identified no issues (0 silenced).
E
======================================================================
ERROR: test_name_exists (contacts.tests.TestNameModel)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Users/CrazyCarl/Software/contact/contacts/tests.py", line 12, in test_name_exists
    name = Name.objects.get(id=1)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/manager.py", line 82, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py", line 403, in get
    self.model._meta.object_name
contacts.models.DoesNotExist: Name matching query does not exist.

----------------------------------------------------------------------
Ran 1 test in 0.002s

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

我尝试在终端中创建一个对象以查看它是否正常工作：

>>>from contacts.models import Name
>>>Name.objects.create(last_name='John', first_name='Smith')
<Name: John, Smith>
>>>Name.objects.all()
<QuerySet [<Name: John, Smith>]>
>>>n = Name.objects.get(id=1)
>>>print (n)
John, Smith

我错过了什么？

Answer 1

最好使用fixtures。基本上，当你尝试get（id = 1）

时，你的数据库中没有任何东西

此外，灯具将节省您在该功能中的时间。祝你好运！

Answer 2

setUpTestData而非setupTestData

Django 2测试：无法获得创建的对象进行测试

2 个答案: