Django tests AssertionError for update view - django

Question

I tried to create Django test for UpdateView
but I have such problem as:
self.assertEqual(application.credit_purpose, 'House Loan')
AssertionError: 'Car Loan' != 'House Loan'
Car Loan
House Loa
def test_application_update(self):
application = Application.objects.create(customer=self.customer, credit_amount=10000, credit_term=12,
credit_purpose='Car Loan', credit_pledge=self.pledge,
product=self.product,
number_request=2, date_posted='2020-01-01', reason='None',
repayment_source=self.repayment, possible_payment=1000,
date_refuse='2020-01-02', protokol_number='123457',
status=self.status,
language=0, day_of_payment=1, credit_user=self.user)
response = self.client.post(
reverse('application_update', kwargs={'pk': application.id}),
{'credit_purpose': 'House Loan'})
self.assertEqual(response.status_code, 200)
application.refresh_from_db()
self.assertEqual(application.credit_purpose, 'House Loan')
This is my model
class Application(AbstractCredit):
number_request = models.IntegerField(verbose_name='Номер заявки', unique=True, default=number_auto) # Добавить автоинкремент
date_posted = models.DateField(verbose_name='Дата заявки', auto_now_add=True)
reason = models.CharField(max_length=200, null=True, blank=True, verbose_name='Причина отказа/Условия одобрения')
repayment_source = models.ForeignKey(Repayment, on_delete=models.CASCADE, verbose_name='Источник погашения')
possible_payment = models.IntegerField(verbose_name='Желаемая сумма ежемесячного взноса')
date_refuse = models.DateField(default=one_day_more, null=True, blank=True, verbose_name='Дата отказа/одобрения')
protokol_number = models.CharField(max_length=20, unique=True, null=True, blank=True,
verbose_name='Номер протокола')
status = models.ForeignKey(Status, on_delete=models.CASCADE, default=1, verbose_name='Статус')
language = models.IntegerField(choices=LANGUAGES_CHOICES, verbose_name='Язык договора', blank=True, null=True)
day_of_payment = models.IntegerField(choices=DAY_OF_PAYMENT_CHOICES,
verbose_name='Предпочитаемый день оплаты по кредиту')
credit_user = models.ForeignKey(User, on_delete=models.SET(0), verbose_name='Кредитный специалист')
This is my view
class ApplicationUpdate(BasePermissionMixin, SuccessMessageMixin, UpdateView):
model = Application
form_class = ApplicationForm
template_name = 'standart_form.html'
permission_required = 'Изменение заявки'
success_message = 'Заявка успешно изменена'
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context['button_name'] = 'Сохранить'
return context
def get_success_url(self):
return reverse_lazy('application_detail', kwargs={'pk': self.get_object().id})

Answer 1

So, I also got stuck in this for a while. The main problem is at:
...
response = self.client.post(
reverse('application_update', kwargs={'pk': application.id}),
{'credit_purpose': 'House Loan'}
)
...
I was able to understand thanks to this answer. It happens because you are posting to a form and it expects to have all fields filled, otherwise it will fail validation and thus will not call .save().
What you can do is, after creating the object copy its data into a dictionary, then modify it before posting:
tests.py
from django.forms.models import model_to_dict
class ApplicationTestCase(TestCase):
def setUp(self):
customer = Customer.objects.create(...)
...
self.data = {
'customer': customer, 'credit_amount': 10000, 'credit_term': 12,
'credit_purpose': 'Car Loan', ...
}
def test_application_update(self):
application = Application.objects.create(**self.data)
post_data = model_to_dict(application)
post_data['credit_purpose'] = 'House Loan'
response = self.client.post(
reverse(
'app:view-name', kwargs={'pk': application.id}),
post_data
)
# print(application.credit_purpose)
# application.refresh_from_db()
# print(application.credit_purpose)
# It returns a redirect so code is 302 not 200.
self.assertEqual(response.status_code, 302)
self.assertEqual(application.credit_purpose, 'House Loan')
Also, get_absolute_url() is set in the wrong place should be under models:
models.py
class Application(AbstractCredit):
...
def get_absolute_url(self):
return reverse('app:view-name', kwargs={'pk': self.pk})