Django-rest-framework: Unit testing file uploads does not populate request.FILES

[w00kie]

Hi, I'm having issues with my unit-testing on file uploads.

I have the following unit-test using the APIClient provided by APITestCase:

@override_settings(MEDIA_ROOT='/tmp/django_test')
def test_attach_file_to_deed(self):
    self._require_login()
    response = self.client.post(
        '/api/deeds/%s/attach_file/' % (self.test_deed.pk, ),
        {
            'file': self.dummyfile,
        },
    )
    self.assertqual(response.status_code, status.HTTP_201_CREATED, 'Error on create.')

But it fails to populate the request.FILES['file'] in the view and gives me the following error:

django.utils.datastructures.MultiValueDictKeyError: "'file'"

My view looks like this:

@action()
def attach_file(self, request, pk=None):
    deed = self.get_object()
    serializer = AttachmentSerializer(
        data={
            'parent': deed.pk,
            'file': request.FILES['file'],
            'original_filename': request.FILES['file'].name,
        },
    )
    if serializer.is_valid():
        serializer.save()
        return Response(serializer.data, status=status.HTTP_201_CREATED)
    else:
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

I could really use a little help debugging this one.

[tomchristie]

Files should be populated with the files argument to serializers, not the data argument. Hope that helps!

[w00kie]

For future reference, using the files parameter in the serializer and setting my APIClient request to format='multipart' fixed all my issues.

[SiddharthMantri]

@w00kie Can I have a look at your Serializer? I'm facing similar issues.

My view

def post(self, request, aid, format='multipart'):
    '''
    Upload New Image
    '''
    business = SomeModel.objects.get(aid=aid)
    serialiser = PictureSerialiser(data={'business': business}, files=request.FILES['image'])
    if serialiser.is_valid():
        serialiser.save()
        return Response(serialiser.data, status=status.HTTP_201_CREATED)
    return Response(serialiser.errors, status=status.HTTP_400_BAD_REQUEST)

My test:

def test_upload_photo(self):
    c = Client()
    test_file = 'path/to/image'
    with open(test_file, 'rb') as data:
        response = c.post(''some_url", {'image': data}, **self.oauth_header)
        self.assertEqual(response.status_code, 201)

[maguri]

Hi,

I would like to test the request.FILES

• How could I do it?

my view looks like this:

@login_required
def upload(request, model_id):
    if not request.POST or not request.FILES:
        return HttpResponseRedirect(reverse('model_detail', args=(model_id,)))
...

I have used this in a previous test to test that a model have a file:

from django.core.files.base import File
...
def test(self):
    with File(file=tempfile.NamedTemporaryFile()) as f:
        ...

Thanks,

[sylwekb]

I know that's an old thread, but I just encountered similar error, I didn't use file serializer though. So, to whom face this issue, there is a solution. To make it work use from django.core.files.uploadedfile import SimpleUploadedFile:

# this is pytest
def test_request_multipart(self, mocker, api_client, video):
    video_upload = SimpleUploadedFile("file.webm", video, content_type="video/webm")

    data = {
        'video_file': video_upload
    }

    response = api_client.post(self.endpoint_url, data, format='multipart')

[hatimbekhushi]

passing format='multipart' argument resolves the error
response = api_client.post(self.endpoint_url, data, format='multipart')