Django Test request.method =='POST'不起作用

Question

I am working on an example in TDD with python and am trying to accept a post request.

Django's Request and response objects page for HttpRequest.method suggests using the following snippet to responde to GET and POST differently

if request.method == 'GET':
    do_something()
elif request.method == 'POST':
    do_something_else()

With this in mind, my view is setup like so:

from django.shortcuts import render
from django.http import HttpResponse
from items.models import Item

def index_page(request):

    name = ''
    if request.method == 'POST':
        name = request.POST['item']
        Item.objects.create(name=name)

    return render(request, 'items/index.html', {'item': name})

My test file contains the following

from django.test import TestCase
from django.http import HttpRequest
from items.views import index_page
from items.models import Item

class IndexPageTest(TestCase):

    def test_index_page_can_save_a_post_request(self):
        request = HttpRequest()
        request.POST['item'] = 'MyItem'
        response = index_page(request)

        self.assertEqual(Item.objects.count(), 1)
        self.assertEqual(Item.objects.first().name, 'MyItem')

Which yields the following error

======================================================================
FAIL: test_index_page_can_save_a_post_request (items.tests.IndexPageTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/items/tests.py", line 43, in test_index_page_can_save_a_post_request
    self.assertEqual(Item.objects.count(), 1)
AssertionError: 0 != 1

However when I alter the view to the following, the test passes.

from django.shortcuts import render
from django.http import HttpResponse
from items.models import Item

def index_page(request):

    name = request.POST.get('item', '')
    if name:
        Item.objects.create(name=name)

    return render(request, 'items/index.html', {'item': name})

Clearly, my page is repsonding to POST requests and the test is sending POST data, but I'm not sure why the if request.method == 'POST': line does not appear to work.

$ python --version
Python 3.5.2 :: Continuum Analytics, Inc.
$ django-admin --version
1.10.3

Answer 1

Your test isn't sending a post. You should use the RequestFactory rather than instantiating HttpRequest directly. Or even better, use the built in test client.