You cannot access body after reading from request's data stream after starting py.test
django, django-rest-framework, http-post, pytest, python
Solution
If you're using django-rest-framework, then you can just use request.data instead of trying to parse json from the request yourself
http://www.django-rest-framework.org/api-guide/requests/
stream = StringIO('[' + request.raw_post_data + ']')
data = JSONParser().parse(stream)
this can be replaced with
data = request.data
Problem
Good afternoon. I'm testing api based on django-rest-framework using pytest. I have the following method that creates a new object (method taken from here): ``` class JSONResponse(HttpResponse): """ An HttpResponse that renders its content into JSON. """ def __init__(self, data, **kwargs): content = JSONRenderer().render(data) kwargs['content_type'] = 'application/json' super(JSONResponse, self).__init__(content, **kwargs) @csrf_exempt @api_view(('POST',)) @permission_classes((IsAuthenticated, )) def create_transaction(request): """ The method takes the data in JSON-format. If the data is correct Transaction object will created, otherwise it returns an error also in JSON-format. """ stream = StringIO('[' + request.raw_post_data + ']') data = JSONParser().parse(stream) serializer = NewTransactionSerializer(data=data, many=True) if serializer.is_valid(): serializer.save() return JSONResponse(serializer.data, status=201) else: return JSONResponse(serializer.errors, status=400) ``` I wrote to it next test: ``` @pytest.mark.django_db def test_create_method(client): correct_data = '''{ "var1": "111", "var2": "222", "var3": 2 }''' client.login(username='test2@github.com', password='test') data = json.loads(correct_data) response = client.post('/rest2/create_transaction/', data, format='json') content = json.loads(response.content) assert content[0]['var1'] == '111' assert content[0]['var2'] == '222' assert content[0]['var3'] == 2 assert response['Content-Type'] == 'application/json' assert response.status_code == 201 ``` When starting pytest displays the following: `Exception: You cannot access body after reading from request's data stream`. Its broke when i post data to url. When I run the same code in the shell, the code runs without problems. I am new to testing, may miss something, help please.