TypeError while using django rest framework tutorial
Question:
I am new to using Django Rest framework, i am following this tutorial
Django-Rest-Framework
Instead of snippets my model consists of a userprofile as given below:
class UserProfile(models.Model):
user = models.OneToOneField(User)
emp_code = models.CharField(max_length=10, blank=True)
user_type = models.IntegerField(max_length=1, default=0, choices=USER_TYPE)
group = models.ForeignKey(Group, null=True, blank=True)
status = models.SmallIntegerField(max_length=1,default=0)
added_on = models.DateTimeField(auto_now_add=True)
The first part of the tutorial ran fine, got the desired output in json format as mentioned, however the second tutorial onwards i am getting type error:
TypeError at /authentication/userprofile/
'type' object is not iterable
Request Method: GET
Request URL: http://*****.com/authentication/userprofile/
Django Version: 1.6
Exception Type: TypeError
Exception Value:
'type' object is not iterable
Exception Location: /home/web/cptm_venv/lib/python2.7/site- packages/rest_framework/views.py in get_permissions, line 226
Python Executable: /usr/bin/python
Python Version: 2.7.3
Python Path:
['/home/web/cptm_venv/lib/python2.7/site-packages',
'/home/web/cptm',
'/home/web/cptm_venv/lib/python2.7/site-packages',
'/usr/lib/python2.7',
'/usr/lib/python2.7/plat-linux2',
'/usr/lib/python2.7/lib-tk',
'/usr/lib/python2.7/lib-old',
'/usr/lib/python2.7/lib-dynload',
'/usr/local/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages',
'/usr/lib/pymodules/python2.7']
Server time: Wed, 11 Dec 2013 17:33:54 +0530
Traceback Switch to copy-and-paste view
/home/web/cptm_venv/lib/python2.7/site-packages/django/core/handlers/base.py in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/django/views/generic/base.py in view
return self.dispatch(request, *args, **kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/django/views/decorators/csrf.py in wrapped_view
return view_func(*args, **kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in dispatch
response = self.handle_exception(exc) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in dispatch
self.initial(request, *args, **kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in initial
self.check_permissions(request) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in check_permissions
for permission in self.get_permissions(): ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in get_permissions
return [permission() for permission in self.permission_classes] ...
▶ Local vars
The rest of the code is almost same as given in the above link in 2nd part and 3rd part:
views.py
from apps.authentication.models import UserProfile
from apps.authentication.serializers import UserProfileSerializer
from rest_framework import mixins
from rest_framework import generics
class UserProfileList(mixins.ListModelMixin,
mixins.CreateModelMixin,
generics.GenericAPIView):
queryset = UserProfile.objects.all()
serializer_class = UserProfileSerializer
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
return self.create(request, *args, **kwargs)
class UserProfileDetail(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
generics.GenericAPIView):
queryset = UserProfile.objects.all()
serializer_class = UserProfileSerializer
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def put(self, request, *args, **kwargs):
return self.update(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
urls.py
from django.conf.urls import patterns, url
from rest_framework.urlpatterns import format_suffix_patterns
from apps.authentication import views
urlpatterns = patterns('',
url(r'^userprofile/$', views.UserProfileList.as_view()),
url(r'^userprofile/(?P<pk>[0-9]+)/$', views.UserProfileDetail.as_view()),
)
urlpatterns = format_suffix_patterns(urlpatterns)
I am missing something very obvious, tried a lot to search what exactly the “type object not iterable” means in this context, and which object is causing the problem, but no luck. I am using Django Rest Framework version 2.3.
Thanks in advance
Answers:
As pointed out by Daniel above, i had this stupid snippet in the settings file, which was causing the problem,
#REST_FRAMEWORK = {
# '''Use hyperlinked styles by default'''
# '''only used if serializer_class attribute is not set on a view'''
# 'DEFAULT_MODEL_SERIALIZER_CLASS':
# 'rest_framkework.serializers.HyperLinkedModelSerializer',
# 'DEFAULT_PERMISSION_CLASSES':
# 'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
# }
Commmented this and it worked.
Just to let others know, I kept getting this same error and found that I forgot to include a comma in my REST_FRAMEWORK. I had this:
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAuthenticated'
),
instead of this:
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAuthenticated',
),
The comma defines this as a one-element tuple
I had the same error when I used custom permissions, because of a ‘typo’
I had:
@permission_classes(EventByFacilityPermissions)
class EventByFacilityViewSet(viewsets.ModelViewSet):
instead of:
@permission_classes((EventByFacilityPermissions,))
class EventByFacilityViewSet(viewsets.ModelViewSet):
Pass the authentication class inside your class instead of in your settings.py if you need authentication just in some classes, and do like this:
authentication_classes = [TokenAuthentication, ]
instead of like this:
authentication_classes = TokenAuthentication
In my case the typo was in views.py. Instead of …
permission_classes = (permissions.IsAuthenticated,)
… I had …
permission_classes = (permissions.IsAuthenticated)
I am new to using Django Rest framework, i am following this tutorial
Django-Rest-Framework
Instead of snippets my model consists of a userprofile as given below:
class UserProfile(models.Model):
user = models.OneToOneField(User)
emp_code = models.CharField(max_length=10, blank=True)
user_type = models.IntegerField(max_length=1, default=0, choices=USER_TYPE)
group = models.ForeignKey(Group, null=True, blank=True)
status = models.SmallIntegerField(max_length=1,default=0)
added_on = models.DateTimeField(auto_now_add=True)
The first part of the tutorial ran fine, got the desired output in json format as mentioned, however the second tutorial onwards i am getting type error:
TypeError at /authentication/userprofile/
'type' object is not iterable
Request Method: GET
Request URL: http://*****.com/authentication/userprofile/
Django Version: 1.6
Exception Type: TypeError
Exception Value:
'type' object is not iterable
Exception Location: /home/web/cptm_venv/lib/python2.7/site- packages/rest_framework/views.py in get_permissions, line 226
Python Executable: /usr/bin/python
Python Version: 2.7.3
Python Path:
['/home/web/cptm_venv/lib/python2.7/site-packages',
'/home/web/cptm',
'/home/web/cptm_venv/lib/python2.7/site-packages',
'/usr/lib/python2.7',
'/usr/lib/python2.7/plat-linux2',
'/usr/lib/python2.7/lib-tk',
'/usr/lib/python2.7/lib-old',
'/usr/lib/python2.7/lib-dynload',
'/usr/local/lib/python2.7/dist-packages',
'/usr/lib/python2.7/dist-packages',
'/usr/lib/pymodules/python2.7']
Server time: Wed, 11 Dec 2013 17:33:54 +0530
Traceback Switch to copy-and-paste view
/home/web/cptm_venv/lib/python2.7/site-packages/django/core/handlers/base.py in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/django/views/generic/base.py in view
return self.dispatch(request, *args, **kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/django/views/decorators/csrf.py in wrapped_view
return view_func(*args, **kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in dispatch
response = self.handle_exception(exc) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in dispatch
self.initial(request, *args, **kwargs) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in initial
self.check_permissions(request) ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in check_permissions
for permission in self.get_permissions(): ...
▶ Local vars
/home/web/cptm_venv/lib/python2.7/site-packages/rest_framework/views.py in get_permissions
return [permission() for permission in self.permission_classes] ...
▶ Local vars
The rest of the code is almost same as given in the above link in 2nd part and 3rd part:
views.py
from apps.authentication.models import UserProfile
from apps.authentication.serializers import UserProfileSerializer
from rest_framework import mixins
from rest_framework import generics
class UserProfileList(mixins.ListModelMixin,
mixins.CreateModelMixin,
generics.GenericAPIView):
queryset = UserProfile.objects.all()
serializer_class = UserProfileSerializer
def get(self, request, *args, **kwargs):
return self.list(request, *args, **kwargs)
def post(self, request, *args, **kwargs):
return self.create(request, *args, **kwargs)
class UserProfileDetail(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
generics.GenericAPIView):
queryset = UserProfile.objects.all()
serializer_class = UserProfileSerializer
def get(self, request, *args, **kwargs):
return self.retrieve(request, *args, **kwargs)
def put(self, request, *args, **kwargs):
return self.update(request, *args, **kwargs)
def delete(self, request, *args, **kwargs):
return self.destroy(request, *args, **kwargs)
urls.py
from django.conf.urls import patterns, url
from rest_framework.urlpatterns import format_suffix_patterns
from apps.authentication import views
urlpatterns = patterns('',
url(r'^userprofile/$', views.UserProfileList.as_view()),
url(r'^userprofile/(?P<pk>[0-9]+)/$', views.UserProfileDetail.as_view()),
)
urlpatterns = format_suffix_patterns(urlpatterns)
I am missing something very obvious, tried a lot to search what exactly the “type object not iterable” means in this context, and which object is causing the problem, but no luck. I am using Django Rest Framework version 2.3.
Thanks in advance
As pointed out by Daniel above, i had this stupid snippet in the settings file, which was causing the problem,
#REST_FRAMEWORK = {
# '''Use hyperlinked styles by default'''
# '''only used if serializer_class attribute is not set on a view'''
# 'DEFAULT_MODEL_SERIALIZER_CLASS':
# 'rest_framkework.serializers.HyperLinkedModelSerializer',
# 'DEFAULT_PERMISSION_CLASSES':
# 'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
# }
Commmented this and it worked.
Just to let others know, I kept getting this same error and found that I forgot to include a comma in my REST_FRAMEWORK. I had this:
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAuthenticated'
),
instead of this:
'DEFAULT_PERMISSION_CLASSES': (
'rest_framework.permissions.IsAuthenticated',
),
The comma defines this as a one-element tuple
I had the same error when I used custom permissions, because of a ‘typo’
I had:
@permission_classes(EventByFacilityPermissions)
class EventByFacilityViewSet(viewsets.ModelViewSet):
instead of:
@permission_classes((EventByFacilityPermissions,))
class EventByFacilityViewSet(viewsets.ModelViewSet):
Pass the authentication class inside your class instead of in your settings.py if you need authentication just in some classes, and do like this:
authentication_classes = [TokenAuthentication, ]
instead of like this:
authentication_classes = TokenAuthentication
In my case the typo was in views.py. Instead of …
permission_classes = (permissions.IsAuthenticated,)
… I had …
permission_classes = (permissions.IsAuthenticated)