django Object not iterable error

[Shekar Tippur]

Hello,

This maybe a generic question. How do I troubleshoot something like this. The stacktrace is not really helpful as it does not point to the code that is causing this issue.

TypeError at /product/

'function' object is not iterable

Request Method:	POST
Request URL:	http://127.0.0.1:8000/product/
Django Version:	1.8.2
Exception Type:	TypeError
Exception Value:	'function' object is not iterable
Exception Location:	/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/urlresolvers.py in resolve, line 238
Python Executable:	/Library/Frameworks/Python.framework/Versions/3.4/bin/python3.4
Python Version:	3.4.3
Python Path:	['/Users/ctippur/PycharmProjects/project1', '/Users/ctippur/PycharmProjects/project1', '/Library/Frameworks/Python.framework/Versions/3.4/lib/python34.zip', '/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4', '/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/plat-darwin', '/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/lib-dynload', '/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages' - Shekar

[James Schneider]

Can you post the entire stack trace? You may have to run a bit up the chain in the race to track down the problem.

-James

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[Shekar Tippur]

James,

Is this what you mean?

- Shekar

 

Environment:

Request Method: POST
Request URL: http://127.0.0.1:8000/product/

Django Version: 1.8.2

Python Version: 3.4.3
Installed Applications:
('django.contrib.admin',
 'django.contrib.auth',
 'django.contrib.contenttypes',
 'django.contrib.sessions',
 'django.contrib.messages',
 'django.contrib.staticfiles',
 'product',
)
Installed Middleware:
('disable.DisableCSRF',
 'django.contrib.sessions.middleware.SessionMiddleware',
 'django.middleware.common.CommonMiddleware',
 'django.middleware.csrf.CsrfViewMiddleware',
 'django.contrib.auth.middleware.AuthenticationMiddleware',
 'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
 'django.contrib.messages.middleware.MessageMiddleware',
 'django.middleware.clickjacking.XFrameOptionsMiddleware',
 'django.middleware.security.SecurityMiddleware')


Traceback:
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
  119.                 resolver_match = resolver.resolve(request.path_info)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/urlresolvers.py" in resolve
  368.                     sub_match = pattern.resolve(new_path)
File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/site-packages/django/core/urlresolvers.py" in resolve
  238.             kwargs.update(self.default_args)

Exception Type: TypeError at /product/

[Vijay Khemlani]

No, you need to post the parts of your code that may have triggered the error.

In this case, your urls.py and the method in your views.py that handles the request probably.

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[Shekar Tippur]

Here my urls.py

urlpatterns = [
    url(r'^admin/', include(admin.site.urls)),
    url(r'^product/$', productviews, productviews.ProductList.as_view()),
    url(r'^product/(?P<pk>[0-9]+)$', productviews.ProductDetail.as_view()),
]

productviews.py

from product.models import Product
from product.serializers import ProductSerializer
from rest_framework import generics
from django.views.decorators.csrf import csrf_exempt
from django.utils.decorators import method_decorator
from django.http import HttpResponse
import json


class ProductList(generics.ListCreateAPIView):
    queryset = Product
    serializer_class = ProductSerializer
    @method_decorator(csrf_exempt)
    def post(self, request, *args, **kwargs):
        received_json_data=json.loads(request.body.decode("utf8"))
        serializer = ProductSerializer(data=received_json_data)
        if serializer.is_valid():
            serializer.save()
            print (request.body)
            return HttpResponse('SUCCESS')
        else:
            print (serializer.errors)
            return HttpResponse('Error')

[James Schneider]

That is what I meant, but the extra code is quite helpful. In your
urls.py file you have this:

url(r'^product/$', productviews, productviews.ProductList.as_view()),

when you probably want this:

url(r'^product/$', productviews.ProductList.as_view()),


You have an extra reference to 'productviews' as the second argument,
which makes the URL resolver unhappy since it is now trying to execute
the whole productviews module as a function.

-James

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[Shekar Tippur]

Thank you! Thank you! Thank you!

Sometimes I miss the most obvious things.

Thanks again.

- Shekar