Ошибка при создании пользователя - Python

Формулировка задачи:

Всем привет. Не могу понять почему возникает исключение при создании пользователя через админку. Traceback

Спойлер

Environment: Request Method: POST Request URL: http://127.0.0.1:8000/admin/auth/user/add/ Django Version: 2.0.2 Python Version: 3.6.3 Installed Applications: ['suit', 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'ckeditor', 'ckeditor_uploader', 'Profile', 'Lectures', 'Tikets', 'News', 'Calendar', 'Stream', 'Practice'] 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 "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute 85. return self.cursor.execute(sql, params) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py" in execute 303. return Database.Cursor.execute(self, query, params) The above exception (UNIQUE constraint failed: Profile_profile.user_id) was the direct cause of the following exception: File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner 35. response = get_response(request) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response 128. response = self.process_exception_by_middleware(e, request) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response 126. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/options.py" in wrapper 574. return self.admin_site.admin_view(view)(*args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view 142. response = view_func(request, *args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/views/decorators/cache.py" in _wrapped_view_func 44. response = view_func(request, *args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/sites.py" in inner 223. return view(request, *args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapper 62. return bound_func(*args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/views/decorators/debug.py" in sensitive_post_parameters_wrapper 76. return view(request, *args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in bound_func 58. return func.__get__(self, type(self))(*args2, **kwargs2) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapper 62. return bound_func(*args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view 142. response = view_func(request, *args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in bound_func 58. return func.__get__(self, type(self))(*args2, **kwargs2) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/auth/admin.py" in add_view 100. return self._add_view(request, form_url, extra_context) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/auth/admin.py" in _add_view 127. return super().add_view(request, form_url, extra_context) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/options.py" in add_view 1553. return self.changeform_view(request, None, form_url, extra_context) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapper 62. return bound_func(*args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in _wrapped_view 142. response = view_func(request, *args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/utils/decorators.py" in bound_func 58. return func.__get__(self, type(self))(*args2, **kwargs2) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/options.py" in changeform_view 1450. return self._changeform_view(request, object_id, form_url, extra_context) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/options.py" in _changeform_view 1491. self.save_related(request, form, formsets, not add) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/options.py" in save_related 1050. self.save_formset(request, form, formset, change=change) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/contrib/admin/options.py" in save_formset 1038. formset.save() File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/forms/models.py" in save 670. return self.save_existing_objects(commit) + self.save_new_objects(commit) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/forms/models.py" in save_new_objects 804. self.new_objects.append(self.save_new(form, commit=commit)) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/forms/models.py" in save_new 950. obj.save() File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/base.py" in save 729. force_update=force_update, update_fields=update_fields) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/base.py" in save_base 759. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/base.py" in _save_table 842. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/base.py" in _do_insert 880. using=using, raw=raw) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/manager.py" in manager_method 82. return getattr(self.get_queryset(), name)(*args, **kwargs) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/query.py" in _insert 1125. return query.get_compiler(using=using).execute_sql(return_id) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/models/sql/compiler.py" in execute_sql 1281. cursor.execute(sql, params) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/utils.py" in execute 100. return super().execute(sql, params) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/utils.py" in execute 68. return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute_with_wrappers 77. return executor(sql, params, many, context) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute 85. return self.cursor.execute(sql, params) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/utils.py" in __exit__ 89. raise dj_exc_value.with_traceback(traceback) from exc_value File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/utils.py" in _execute 85. return self.cursor.execute(sql, params) File "/Users/shadow/pyenv/university/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py" in execute 303. return Database.Cursor.execute(self, query, params) Exception Type: IntegrityError at /admin/auth/user/add/ Exception Value: UNIQUE constraint failed: Profile_profile.user_id

Код модели Profile

from django.db import models
from django.contrib.auth.models import User
from django.db.models.signals import post_save
from django.dispatch import receiver
from Stream.models import Stream

class Profile(models.Model):
    # TODO ошибка при создании нового пользователя из админки!
    user = models.OneToOneField(User, on_delete=models.CASCADE)
    stream = models.OneToOneField(Stream, on_delete=models.SET_NULL, default=None, null=True, blank=True)
    last_lesson_date = models.DateField(default=None, null=True, blank=True)
 
    avatar = models.ImageField(default=None, null=True, blank=True, upload_to='uploads/Profile/')

@receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    if created:
        Profile.objects.create(user=instance)

@receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
     instance.profile.save()

код Profile.admin.py

from django.contrib import admin
from .models import User, Profile
from django.contrib.auth.admin import UserAdmin
 
admin.site.unregister(User)

class UserActivitiesInline(admin.StackedInline):
    model = Profile
    max_num = 1
    min_num = 1
 
    def has_delete_permission(self, request, obj=None):
        return False

@admin.register(User)
class ProfileAdmin(UserAdmin):
    inlines = [UserActivitiesInline]

Самое интересное что когда я создаю пользователя напрямую

>>> from django.contrib.auth.models import User
>>> User.objects.create(username='test2', password='Qazxsw21')
<User: test2>

То юзер создается и как положено вместе с профайлом. Помогите разобраться в чем проблема может быть?

Решение задачи: «Ошибка при создании пользователя»

textual
                            Листинг программы 
                        

                            @receiver(post_save, sender=User)
def create_user_profile(sender, instance, created, **kwargs):
    # Этот сигнал неправильно закодин, при создании профайла для пользователя когда из админки указан объект Stream
    # то этот код по сути уберет значение поля stream так как создаст профайл только с атрибутом user, что в дальнейшем и 
    # вывалится в ошибку. Поэтому этот метод нужно вообще убрать так как есть сигнал ниже да и вообще создание 
    # объекта Profile происходит автоматом.
    if created:
        Profile.objects.create(user=instance)
 
 
@receiver(post_save, sender=User)
def save_user_profile(sender, instance, **kwargs):
    # Правда не все так просто, если при создании пользователя никакие поля Profile не трогать, а в объекте Profile
    # нет required полей, то объект Profile созда не будет. А этот код вывалит ошибку так как в поле Profile.user_id 
    # будет None вместо id пользователя. Тогда надо просто добавить заполнение Profile.user_id принудительно если 
    # сигнал создает пользователя
    if kwargs['created']:
        instance.profile.user_id = instance.id
    # вот и все)
    instance.profile.save()
                        