为什么我在 Django APITestCase 中运行两个测试时出错？

Question

I make tests for my API. When I run two tests I get error apps.users.models.DoesNotExist: User matching query does not exist. in line self.user = User.objects.get(pk=48) on the second test . But if I run only one test, test is passed. What is the reason?

class MyTestCase(APITestCase):
    def setUp(self):
        user_data = []
        for i in range(1, 124):
            user_data.append({
                'email': 'first@mail.com'+str(i),
                'first_name': "firstname"+str(i),
                'last_name': "lastname"+str(i),
                'ip_address': "192.168.0."+str(i),
            })
        users = User.objects.bulk_create([User(**i) for i in user_data])
        self.user = User.objects.get(pk=48)   # I get error in this line

    def test_users_list(self):
        ...

    def test_users_pagination(self):
        url = reverse('users-list')
        self.client.force_authenticate(self.user)
        response = self.client.get(url, {'users_count': 24, 'page': 2})

Answer 1

The method setUp is called before every test you define in the test case. What's happening is the first test runs setUp and creates users with pk values ranging from 1 to 123, and the second test creates users with pk values from 124 to 246, so there is no user with pk=48 .

Try selecting the user based on another attribute like email='first@mail.com48' , and you should be good.