Django rest framework one to one relation Update serializer - python

I'm a beginner to the Django Rest Frame work. I have a problem from a long period i try to find a solution through many forums but unfortunately i didn't succeed. hope you help me
models.py
from __future__ import unicode_literals
from django.contrib.auth.models import User
from django.db import models
class Account(models.Model):
my_user=models.OneToOneField(User,on_delete=models.CASCADE)
statut=models.CharField(max_length=80)
date=models.DateField(auto_now=True,auto_now_add=False)
def __unicode__(self):
return self.my_user.first_name
Now i want to update Account serilizer .
Serializers .py
class AccountUpdateSerializer(serializers.ModelSerializer):
username=serializers.CharField(source ='my_user.username')
class Meta:
model= Account
fields=['id','username','statut','date']
def update(self, instance, validated_data):
print(instance)
instance.statut = validated_data.get('statut', instance.statut)
instance.my_user.username=validated_data['username']
return instance
Trace Back:
Environment:
Request Method: PUT
Request URL: http://127.0.0.1:9000/api/account/edit/1/
Django Version: 1.9
Python Version: 2.7.6
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'project',
'sponsors',
'contacts',
'medias',
'conferencier',
'competition',
'poste',
'account']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'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']
Traceback:
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
149. response = self.process_exception_by_middleware(e, request)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
147. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/views/decorators/csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/views/generic/base.py" in view
68. return self.dispatch(request, *args, **kwargs)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
474. response = self.handle_exception(exc)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/views.py" in handle_exception
434. self.raise_uncaught_exception(exc)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/views.py" in dispatch
471. response = handler(request, *args, **kwargs)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/generics.py" in put
256. return self.update(request, *args, **kwargs)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/mixins.py" in update
70. self.perform_update(serializer)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/mixins.py" in perform_update
74. serializer.save()
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/serializers.py" in save
187. self.instance = self.update(self.instance, validated_data)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/rest_framework/serializers.py" in update
907. setattr(instance, attr, value)
File "/home/asus/Documents/Gsource/gsource/local/lib/python2.7/site-packages/django/db/models/fields/related_descriptors.py" in __set__
207. self.field.remote_field.model._meta.object_name,
Exception Type: ValueError at /api/account/edit/1/
Exception Value: Cannot assign "{u'username': u'kais'}": "Account.my_user" must be a "User" instance.

Your update method is not called, because it is a method of the meta class of the serializer (AccountUpdateSerializer.Meta), not the serializer class AccountUpdateSerializer itself.
Here is how it should look:
class AccountUpdateSerializer(serializers.ModelSerializer):
username=serializers.CharField(source ='my_user.username')
class Meta:
model= Account
fields=['id','username','statut','date']
def update(self, instance, validated_data):
print(instance)
instance.statut = validated_data.get('statut', instance.statut)
instance.my_user.username = validated_data['username']
return instance
(Or did you just post your code incorrectly?)

Related

Django Social Auth - Google: AttributeError: 'NoneType' object has no attribute 'provider'

I am receiving this error when trying to login via google, I've tried just about everything I can think of and similar issues on SO don't seem to help. I have a custom user model setup as such:
models.py
from django.contrib.auth.models import AbstractUser
from django.db import models
class Departments(models.Model):
name = models.CharField(max_length=255, unique=True)
def __str__(self):
return self.name
class AlluredUser(AbstractUser):
departments = models.ManyToManyField(Departments)
def __str__(self):
return self.username
forms.py
from django import forms
from django.contrib.auth.forms import UserCreationForm, UserChangeForm
from .models import AlluredUser
class CustomUserCreationForm(UserCreationForm):
class Meta:
model = AlluredUser
fields = ('username', 'email')
class CustomUserChangeForm(UserChangeForm):
class Meta:
model = AlluredUser
fields = ('username', 'email')
Social Auth Pipeline
SOCIAL_AUTH_PIPELINE = (
'social_core.pipeline.social_auth.social_details',
'social_core.pipeline.social_auth.social_uid',
'social_core.pipeline.social_auth.auth_allowed',
'social_core.pipeline.social_auth.social_user',
'social_core.pipeline.user.get_username',
'social_core.pipeline.social_auth.associate_by_email',
'social_core.pipeline.user.create_user',
'social_core.pipeline.social_auth.associate_user',
'social_core.pipeline.social_auth.load_extra_data',
'social_core.pipeline.user.user_details'
)
Error Traceback
AttributeError at /auth/complete/google-oauth2/
'NoneType' object has no attribute 'provider'
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/auth/complete/google-oauth2/?state=8XLcbxz6sPSPOwJfOIXWOud88UJ5YtL2&code=4/twHRVLHTMzBV99K-VvektvJfjGuJYGBvqi254dWTuA2dLmbNFw3fIp8l5pdYSqKK89ONPGrxInG39pH8Wf-fpas&scope=email%20profile%20https://www.googleapis.com/auth/userinfo.profile%20https://www.googleapis.com/auth/userinfo.email%20openid&authuser=0&hd=allured.com&session_state=2403f8348307b18b8ab460026d3c88b1b18d759f..5dbb&prompt=none
Django Version: 2.2.4
Python Version: 3.7.4
Installed Applications:
['user.apps.UserConfig',
'issue_tracker.apps.IssueTrackerConfig',
'ytd_reports.apps.YtdReportsConfig',
'stats.apps.StatsConfig',
'scheduler.apps.SchedulerConfig',
'submissions.apps.SubmissionsConfig',
'dash_app.apps.DashAppConfig',
'contact.apps.ContactConfig',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.humanize',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'social_django']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'social_django.middleware.SocialAuthExceptionMiddleware',
'dashboard.middleware.loginRequired.LoginRequiredMiddleware']
Traceback:
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\base.py" in _get_response
115. response = self.process_exception_by_middleware(e, request)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\base.py" in _get_response
113. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\views\decorators\cache.py" in _wrapped_view_func
44. response = view_func(request, *args, **kwargs)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view
54. return view_func(*args, **kwargs)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\social_django\utils.py" in wrapper
49. return func(request, backend, *args, **kwargs)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\social_django\views.py" in complete
33. *args, **kwargs)
File "C:\Users\jsarko\AppData\Local\Programs\Python\Python37-32\lib\site-packages\social_core\actions.py" in do_complete
71. social_user.provider)
Exception Type: AttributeError at /auth/complete/google-oauth2/
Exception Value: 'NoneType' object has no attribute 'provider'
I'm guessing it has something to do with the custom user model I created since I didn't have this problem beforehand. Any help would be much appreciated.
The error on the link doesn't match what you mention in the title.
For the traceback, the solution is just to add this:
SESSION_COOKIE_SECURE = False

Django templated mail 'dict' object has no attribute 'get_host'

I'm trying to send a verification email after a user registers an account using django-templated-mail.
This is the error I get after the user is created:
AttributeError 'dict' object has no attribute 'get_host'
So Django is trying to call get_host() and is unable to? So it's an error because it can't retrieve my host name?
Can someone point out what am I missing here?
class UserListView(generics.ListCreateAPIView):
serializer_class = UserSerializer
def perform_create(self, serializer):
user = serializer.save()
context = {'user': user}
to = user.email
email.ActivationEmail(context).send(to)
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('id', 'password', 'email')
extra_kwargs = {'password': {'write_only': True}}
def create(self, validated_data):
password = validated_data.pop('password')
user = super(UserSerializer, self).create(validated_data)
user.set_password(password)
user.save()
return user
class ActivationEmail(BaseEmailMessage):
template_name = 'email/activation.html'
def get_context_data(self):
context = super(ActivationEmail, self).get_context_data()
user = context.get('user')
context['uid'] = utils.encode_uid(user.pk)
context['token'] = default_token_generator.make_token(user)
context['url'] = 'verify/{uid}/{token}'.format(**context)
return context
Traceback:
Environment:
Request Method: POST
Request URL: http://localhost:8000/users/
Django Version: 2.0
Python Version: 3.6.6
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'corsheaders',
'templated_mail',
'accounts',]
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'corsheaders.middleware.CorsMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'simple_history.middleware.HistoryRequestMiddleware']
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/rest_framework/generics.py" in post
244. return self.create(request, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/rest_framework/mixins.py" in create
21. self.perform_create(serializer)
File "/code/accounts/views.py" in perform_create
54. email.ActivationEmail(context).send(to)
File "/usr/local/lib/python3.6/site-packages/templated_mail/mail.py" in send
69. self.render()
File "/usr/local/lib/python3.6/site-packages/templated_mail/mail.py" in render
61. context = make_context(self.get_context_data(), request=self.request)
File "/code/accounts/email.py" in get_context_data
12. context = super(ActivationEmail, self).get_context_data()
File "/usr/local/lib/python3.6/site-packages/templated_mail/mail.py" in get_context_data
33. site = get_current_site(self.request)
File "/usr/local/lib/python3.6/site-packages/django/contrib/sites/shortcuts.py" in get_current_site
16. return RequestSite(request)
File "/usr/local/lib/python3.6/site-packages/django/contrib/sites/requests.py" in __init__
10. self.domain = self.name = request.get_host()
Exception Type: AttributeError at /users/
Exception Value: 'dict' object has no attribute 'get_host'
Thank you much appreciate any help you may be able to render.
ActivationEmail takes the request as the first positional argument to its initializer. You're passing the context as the first positional argument, which causes ActivationEmail to fall over.
Make sure you pass the request instance as well as the context to ActivationEmail when you create it.
email.ActivationEmail(self.request, context).send(to)
You instantiated ActivationEmail incorrectly. The request parameter should be an HttpRequest object instead of a dict.

Django - one to one serializer Create function

I extended the default User model to ExtendedUser:
from django.db import models
from django.contrib.auth.models import User
class ExtendedUser(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
shirt_size = models.CharField(max_length=2)
User serializer:
from django.contrib.auth.models import User
from rest_framework import serializers
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ('url', 'username', 'email', 'groups', 'is_staff')
ExtendedUser serializer:
from api.resources.users.models.extended_user import ExtendedUser
from rest_framework import serializers
from django.contrib.auth.models import User
from api.resources.users.serializers.user import UserSerializer
class ExtendedUserSerializer(serializers.HyperlinkedModelSerializer):
user = UserSerializer(read_only=False)
class Meta:
model = ExtendedUser
fields = ('url', 'shirt_size', 'user')
def create(self, validated_data):
user_data = validated_data.pop('user')
user = User.objects.create(**user_data)
return ExtendedUser.objects.create(user=user, **validated_data)
The main result should be that on submitting new ExtendedUser it will create a user too with one to one realation.
But I am getting this error:
User: myusername needs to have a value for field "user" before this
many-to-many relationship can be used.
Traceback:
Environment:
Request Method: POST
Request URL: http://localhost:8000/users/
Django Version: 1.10.4
Python Version: 2.7.12
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'rest_framework',
'api']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Traceback:
File "C:\Python27\lib\site-packages\django\core\handlers\exception.py" in inner
39. response = get_response(request)
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "C:\Python27\lib\site-packages\django\core\handlers\base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Python27\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view
58. return view_func(*args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\viewsets.py" in view
83. return self.dispatch(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
477. response = self.handle_exception(exc)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in handle_exception
437. self.raise_uncaught_exception(exc)
File "C:\Python27\lib\site-packages\rest_framework\views.py" in dispatch
474. response = handler(request, *args, **kwargs)
File "C:\Python27\lib\site-packages\rest_framework\mixins.py" in create
21. self.perform_create(serializer)
File "C:\Python27\lib\site-packages\rest_framework\mixins.py" in perform_create
26. serializer.save()
File "C:\Python27\lib\site-packages\rest_framework\serializers.py" in save
214. self.instance = self.create(validated_data)
File "C:/Users/ozbar/PycharmProjects/usnccm/usnccm-api\api\resources\users\serializers\extended_user.py" in create
15. user = User.objects.create(**user_data)
File "C:\Python27\lib\site-packages\django\db\models\manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\query.py" in create
397. obj = self.model(**kwargs)
File "C:\Python27\lib\site-packages\django\contrib\auth\base_user.py" in __init__
68. super(AbstractBaseUser, self).__init__(*args, **kwargs)
File "C:\Python27\lib\site-packages\django\db\models\base.py" in __init__
550. setattr(self, prop, kwargs[prop])
File "C:\Python27\lib\site-packages\django\db\models\fields\related_descriptors.py" in __set__
499. manager = self.__get__(instance)
File "C:\Python27\lib\site-packages\django\db\models\fields\related_descriptors.py" in __get__
476. return self.related_manager_cls(instance)
File "C:\Python27\lib\site-packages\django\db\models\fields\related_descriptors.py" in __init__
783. (instance, self.source_field_name))
Exception Type: ValueError at /users/
Exception Value: "<User: oz>" needs to have a value for field "user" before this many-to-many relationship can be used.
Validated_data object`s value on POST via django-rest web view:
{u'user': OrderedDict([(u'username', u'oz'), (u'email', u'oz.barshalom#gmail.com'), (u'groups', []), (u'is_staff', True)]), u'shirt_size': u'm'}
Okay for starters, the problem has nothing to do with django-rest-framework or your python version.
It seems to be an issue with django==1.10 as I simply tried:
User.objects.create(user="hello", email="333.22#eewofw.com", groups=[], is_staff=False)
in django's shell and received the exact same error. However, if we try newer versions of django, the problem does not persist.
I have noticed that when installing django using this command:
pip install django
It will install django==1.10 and not the latest version. If you mistakenly installed this older version, I suggest to uninstall django and then install the latest version:
pip uninstall django
pip install django==1.9.12
When using django==1.9.12, you need to remove groups completely from your UserSerializer and not provide it when doing your POST.

django-polymorphic admin "cannot create 'NoneType' instances"

I have been trying to make the basic django-polymorphic example to work.
models.py
from polymorphic import PolymorphicModel, ShowFieldContent
class Project(ShowFieldContent, PolymorphicModel):
topic = models.CharField(max_length=30)
class ArtProject(Project):
artist = models.CharField(max_length=30)
class ResearchProject(Project):
supervisor = models.CharField(max_length=30)
admin.py
from django.contrib import admin
from polymorphic.admin import PolymorphicParentModelAdmin, PolymorphicChildModelAdmin, PolymorphicChildModelFilter
from rapidhealth.core.models import Project, ArtProject, ResearchProject
class ProjectChildAdmin(PolymorphicChildModelAdmin):
base_model = Project
class ProjectAdmin(PolymorphicParentModelAdmin):
base_model = Project
list_filter = (PolymorphicChildModelFilter,)
child_models = (
(Project, ProjectChildAdmin),
(ArtProject, ProjectChildAdmin),
(ResearchProject, ProjectChildAdmin),
)
admin.site.register(Project, ProjectAdmin)
Now when trying to create a new "project" in the admin site I get:
Environment:
Request Method: GET
Request URL: http://127.0.0.1:8000/admincore/project/add/?ct_id=42
Django Version: 1.5.1
Python Version: 2.7.3
Installed Applications:
('django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'sekizai',
'mptt',
'south',
'reversion',
'rest_framework',
'polymorphic',
'rapidhealth.core',
'debug_toolbar')
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.doc.XViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'debug_toolbar.middleware.DebugToolbarMiddleware')
Traceback:
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response
115. response = callback(request, *callback_args, **callback_kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper
372. return self.admin_site.admin_view(view)(*args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
89. response = view_func(request, *args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner
202. return view(request, *args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/polymorphic/admin.py" in add_view
225. return real_admin.add_view(request, form_url, extra_context)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapper
25. return bound_func(*args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/utils/decorators.py" in bound_func
21. return func(self, *args2, **kwargs2)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/db/transaction.py" in inner
223. return func(*args, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view
984. ModelForm = self.get_form(request)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/polymorphic/admin.py" in get_form
484. return super(PolymorphicChildModelAdmin, self).get_form(request, obj, **kwargs)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in get_form
465. return modelform_factory(self.model, **defaults)
File "/home/lucas-fievet/.virtualenvs/rh/local/lib/python2.7/site-packages/django/forms/models.py" in modelform_factory
424. return type(form)(class_name, (form,), form_class_attrs)
Exception Type: TypeError at /admincore/project/add/
Exception Value: cannot create 'NoneType' instances
Does anyone understand what the problem is?
I have tried all kind of changes. When using the default django admin I can create a project.
Thank you,
Lucas
It turned out that specifying explicitly the form to use solved the problem:
class ProjectForm(forms.ModelForm):
class Meta:
model = Project
class ProjectChildAdmin(PolymorphicChildModelAdmin):
base_model = Project
base_form = ProjectForm
For some reason the form is not automatically generated.

Set ModelForm integer field as unrequired

I currently have a ModelForm set up in Django, but would like to make one of the fields of the form unrequired. Here's my forms.py:
from django.forms import ModelForm
from add_flair.models import User
class UserForm(ModelForm):
class Meta:
model = User
def __init__(self, *args, **kwargs):
super(UserForm, self).__init__(*args, **kwargs)
self.fields['year'].required = False
So I figured out how to override the 'required' attribute of my 'year' field, but when I go to submit a form with no year, I get:
Environment:
Request Method: POST
Request URL: http://127.0.0.1:9999/flair/add/
Django Version: 1.3
Python Version: 2.6.6
Installed Applications:
['django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.sites',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'project.add_flair']
Installed Middleware:
('django.middleware.common.CommonMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware')
Traceback:
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/core/handlers/base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "/home/coreyf/dev/reddit-calpoly-addflair/project/../project/add_flair/views.py" in add
14. save_user(form, confirm_num)
File "/home/coreyf/dev/reddit-calpoly-addflair/project/../project/add_flair/views.py" in save_user
42. user.save()
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/base.py" in save
460. self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/base.py" in save_base
543. for f in meta.local_fields if not isinstance(f, AutoField)]
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/subclassing.py" in inner
28. return func(*args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/subclassing.py" in inner
28. return func(*args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/__init__.py" in get_db_prep_save
276. return self.get_db_prep_value(value, connection=connection, prepared=False)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/subclassing.py" in inner
53. return func(*args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/subclassing.py" in inner
53. return func(*args, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/__init__.py" in get_db_prep_value
271. value = self.get_prep_value(value)
File "/usr/local/lib/python2.6/dist-packages/Django-1.3-py2.6.egg/django/db/models/fields/__init__.py" in get_prep_value
876. return int(value)
Exception Type: ValueError at /flair/add/
Exception Value: invalid literal for int() with base 10: ''
I'm assuming that int() is trying to parse an empty value and throwing an error. Is there any way to fix this? Is there a better way of making a field from a ModelForm unrequired?
Add blank=True, null=True to your field declaration im models.py (and don't forget to reflect this change in DB, by migration or manually).

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