We Keep Coding

Django rest framework: catch ValidationError from external package

I'm using the django-rest-passwordreset package to implement password reset endpoints.
When a given email doesn't exist, it throws a ValidationError exception, causing a 500 error. How can I catch this error, and return a 400 instead? I simply added the urls as shown below, so I don't think I can surround it with an try: except or something similar.
urlpatterns=[
...
url(r'^password/recover/', include('django_rest_passwordreset.urls')),
...
]
Exception:
ValidationError at /password/recover/
{'email': ['There is no active user associated with this e-mail address or the password can not be changed']}
Request Method: POST
Request URL: http://192.168.99.100:8000/password/recover/
Django Version: 2.0.6
Traceback:
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
35. response = get_response(request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
128. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
126. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.6/site-packages/django/views/decorators/csrf.py" in wrapped_view
54. return view_func(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django/views/generic/base.py" in view
69. return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in dispatch
483. response = self.handle_exception(exc)
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in handle_exception
443. self.raise_uncaught_exception(exc)
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in dispatch
480. response = handler(request, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/django_rest_passwordreset/views.py" in post
116. code='invalid')}
Exception Type: ValidationError at /password/recover/
Exception Value: {'email': ['There is no active user associated with this e-mail address or the password can not be changed']}
Request information:
USER: AnonymousUser
GET: No GET data
POST: No POST data
FILES: No FILES data
COOKIES: No cookie data
HEADERS: "email" : "bob#thebuilder.com"

I managed to solve it by creating a custom Exception handler as described here.
Additional information:
- Filter on the specific error message to avoid catching ALL ValidationErrors,
- Otherwise return the standard Django exception response.

DRF request handler is throwing exception: retrieve() got an unexpected keyword argument 'pk'

I'm trying to retrieve a model instance in Django Rest Framework 3.6.3 at /path/to/API/widget/1/, 1 being the primary key of the widget. It's giving me:
retrieve() got an unexpected keyword argument 'pk'
From the trace I think I'm doing something to cause dispatch to throw an exception when instantiating the handler (from views.py, source here). I don't understand what I'm doing wrong through when I examine the source. Here's the trace:
Traceback:
File "/lib/python3.5/site-packages/django/core/handlers/exception.py" in inner
41. response = get_response(request)
File "/lib/python3.5/site-packages/django/core/handlers/base.py" in _legacy_get_response
249. response = self._get_response(request)
File "/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/lib/python3.5/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/lib/python3.5/site-packages/django/views/decorators/csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "/lib/python3.5/site-packages/rest_framework/viewsets.py" in view
86. return self.dispatch(request, *args, **kwargs)
File "/lib/python3.5/site-packages/rest_framework/views.py" in dispatch
489. response = self.handle_exception(exc)
File "/lib/python3.5/site-packages/rest_framework/views.py" in handle_exception
449. self.raise_uncaught_exception(exc)
File "/lib/python3.5/site-packages/rest_framework/views.py" in dispatch
486. response = handler(request, *args, **kwargs)
Exception Type: TypeError at /path/to/API/widget/1/
Exception Value: retrieve() got an unexpected keyword argument 'pk'
Here's the view from the ViewSet:
def retrieve(self, request, some_lookup_field=None):
instance = self.get_object(pk) # handle multi-tenant access control
if not instance:
return Response(status=status.HTTP_404_NOT_FOUND)
serializer = self.get_serializer(instance) # from the class's `serializer_cass` attribute
return Response(serializer.data)

As you see in your stacktrace, the error is:
retrieve() got an unexpected keyword argument 'pk'.
Look closely in your retrieve() function:
def retrieve(self, request, some_lookup_field=None):
# ____________________________^
instance = self.get_object(pk) # handle multi-tenant access control
# _________________________^
...
You are taking some_lookup_field as a parameter and not pk, that you use below in self.get_object(pk). Try to rename some_lookup_field to pk.

This error might because you put wrong urls in your url.py. I've had the same problem in my project

View to use external URL

I want to access ElasticSearch securely via a Django URL. From this request, I will lookup the user's token to get their primary key. Then I will only show ES results that match.
For now, I just want to connect to my ElasticSearch URL. It would kind of work like a "proxy".
Anyway, the following returns the bottom traceback. How do I set it up correctly? Do I need a serialiser
views.py
from django.http import HttpResponseRedirect
class ElasticViewSet(viewsets.ModelViewSet):
def my_view(request):
if True:
return HttpResponseRedirect('http://localhost:9200/_seach')
urls.py
router.register(r'elastic', ElasticViewSet, base_name='Elastic')
Traceback
Traceback:
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
149. response = self.process_exception_by_middleware(e, request)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
147. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/rest_framework/viewsets.py" in view
83. return self.dispatch(request, *args, **kwargs)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
477. response = self.handle_exception(exc)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/rest_framework/views.py" in handle_exception
437. self.raise_uncaught_exception(exc)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
474. response = handler(request, *args, **kwargs)
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/rest_framework/mixins.py" in list
40. queryset = self.filter_queryset(self.get_queryset())
File "/Users/mac1/Dev/A51/Backend/NewDJ/venv/lib/python2.7/site-packages/rest_framework/generics.py" in get_queryset
67. % self.__class__.__name__
Exception Type: AssertionError at /****/elastic/
Exception Value: 'ElasticViewSet' should either include a `queryset` attribute, or override the `get_queryset()` method.

First thing first, you don't want a ModelViewSet as there's no Model. Just go for the regular ViewSet.
Second, please take some time to think about what you want to do and how you want it done. my_view is not a ViewSet regular action. Returning HttpResponseRedirect is not acting as a proxy.

MongoDBForm error "ValueError:A document class must be provided"

Hi i am creating a simple Sign Up form with django framework and mongodb. Following is my view:
class SignUpView(FormView):
template_name='MnCApp/signup.html'
form_class=EmployeeForm()
succes_url='/success/'
Following is my model:
class Employee(Document):
designation=StringField()
department=StringField()
emp_name=StringField(max_length=50)
password=StringField(max_length=10)
Following is my forms.py
class EmployeeForm(DocumentForm):
class meta:
desigs=(
('D','Director'),
('GM','General Manager'),
('AM','Assistant Manager'),
('A','Associates')
)
deptts=(
('HR','Human Resources'),
('IT','IT Support'),
('TT','Technical Team'),
('SM','Sales and Marketting'),
('SS','Support Staff')
)
document=Employee
fields='__all__'
widgets={
'designation':Select(choices=desigs),
'department':Select(choices=deptts)
}
Following is the traceback ValueError recieved on loading SignUpview
Traceback:
File "C:\Program Files\Python35\lib\site-packages\django\core\handlers\exception.py" in inner
39. response = get_response(request)
File "C:\Program Files\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "C:\Program Files\Python35\lib\site-packages\django\core\handlers\base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Program Files\Python35\lib\site-packages\django\views\generic\base.py" in view
68. return self.dispatch(request, *args, **kwargs)
File "C:\Program Files\Python35\lib\site-packages\django\views\generic\base.py" in dispatch
88. return handler(request, *args, **kwargs)
File "C:\Program Files\Python35\lib\site-packages\django\views\generic\edit.py" in get
174. return self.render_to_response(self.get_context_data())
File "C:\Program Files\Python35\lib\site-packages\django\views\generic\edit.py" in get_context_data
93. kwargs['form'] = self.get_form()
File "C:\Program Files\Python35\lib\site-packages\django\views\generic\edit.py" in get_form
45. return form_class(**self.get_form_kwargs())
File "C:\Program Files\Python35\lib\site-packages\mongodbforms\documents.py" in init
353. raise ValueError('A document class must be provided.')
Exception Type: ValueError at /signup/
Exception Value: A document class must be provided.
I am not able to find root of this problem. I am new to django and this is my first project. Also is their anyother way for creating model forms for mongo documents??

I suspect that your inner class should be called Meta, not meta.

twitter login: 401 Client Error: Authorization Required

I'm using python-social-auth to implement twitter login locally but I get the 401 client error. My django version is 1.6.
Traceback:
File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in get_response
112. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Library/Python/2.7/site-packages/social/apps/django_app/utils.py" in wrapper
45. return func(request, backend, *args, **kwargs)
File "/Library/Python/2.7/site-packages/social/apps/django_app/views.py" in auth
12. return do_auth(request.social_strategy, redirect_name=REDIRECT_FIELD_NAME)
File "/Library/Python/2.7/site-packages/social/actions.py" in do_auth
25. return strategy.start()
File "/Library/Python/2.7/site-packages/social/strategies/base.py" in start
66. return self.redirect(self.backend.auth_url())
File "/Library/Python/2.7/site-packages/social/backends/oauth.py" in auth_url
99. token = self.set_unauthorized_token()
File "/Library/Python/2.7/site-packages/social/backends/oauth.py" in set_unauthorized_token
158. token = self.unauthorized_token()
File "/Library/Python/2.7/site-packages/social/backends/oauth.py" in unauthorized_token
177. method=self.REQUEST_TOKEN_METHOD)
File "/Library/Python/2.7/site-packages/social/backends/base.py" in request
205. response.raise_for_status()
File "/Library/Python/2.7/site-packages/requests/models.py" in raise_for_status
808. raise HTTPError(http_error_msg, response=self)
Exception Type: HTTPError at /login/twitter/
Exception Value: 401 Client Error: Authorization Required
In documentation it suggests to install ntp.I have no clue how to install ntp.

It turns out I left the callback url field blank in the twitter app console. Although, it's not required, but putting http://127.0.0.1:8000/complete/twitter/ (Note the slash at the end) did the job.

Note also that if you leave the final '/' off the end of the call back URL, you will get this error. It should read
http://127.0.0.1:8000/complete/twitter/