我正在使用带有postgresql 9.1的Django 1.4.1。
我需要向使用auth应用程序的用户添加配置文件，并允许管理员应用程序创建和编辑此配置文件。 因此，我一直在关注文档部分Storing additional information about users：
class UserProfile(models.Model):
user = models.OneToOneField(User)
bio = models.TextField(null = True, blank = True)
contact = models.TextField(null = True, blank = True)
def create_user_profile(sender, instance, created, **kwargs):
if created:
UserProfile.objects.create(user=instance)
post_save.connect(create_user_profile, sender=User)
...
AUTH_PROFILE_MODULE = 'userprofile.UserProfile'
...
我还激活了django.contrib.auth中的django.contrib.admin和INSTALLED_APPS个应用。
class UserProfileInline(admin.StackedInline):
model = UserProfile
can_delete = False
verbose_name_plural = 'profile'
class UserAdmin(UserAdmin):
inlines = (UserProfileInline, )
# Re-register UserAdmin
admin.site.unregister(User)
admin.site.register(User, UserAdmin)
现在，当我运行管理员应用并要求添加（创建）新用户时，我被要求通过两步流程创建我的用户：首先，要求提供一个页面只有用户名，密码（两次）和我的两个UserProfile字段。
如果我只键入用户名和密码（两次）并单击“保存”，我会显示该过程的第二页，它允许填写所有其他用户字段以及我的UserProfile字段。有一条消息说“用户”xxxxx“已成功添加。您可以在下面再次编辑它。”，幸运的是我可以编辑两个模型中的字段，它可以工作。
但是，如果我尝试在第一页的一个或两个UserProfile字段中输入任何内容，则提交失败并显示以下消息：
IntegrityError at /admin/auth/user/add/
duplicate key value violates unique constraint "userprofile_userprofile_user_id_key"
DETAIL: Key (user_id)=(7) already exists.
每次尝试都会增加“7”。
如何避免这种行为，或者如何阻止配置文件字段在第一页中可编辑，但是让它们在第二页中进行编辑？
完整追溯：
Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/admin/auth/user/add/
Django Version: 1.4.1
Python Version: 2.7.3
Installed Applications:
('django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'django.contrib.admin',
'django.contrib.admindocs',
'userprofile')
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/python2.7/dist-packages/django/core/handlers/base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/options.py" in wrapper
366. return self.admin_site.admin_view(view)(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/cache.py" in _wrapped_view_func
89. response = view_func(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/sites.py" in inner
196. return view(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/debug.py" in sensitive_post_parameters_wrapper
69. return view(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapper
25. return bound_func(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in bound_func
21. return func(self, *args2, **kwargs2)
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py" in inner
209. return func(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/admin.py" in add_view
114. extra_context)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapper
25. return bound_func(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in _wrapped_view
91. response = view_func(request, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/utils/decorators.py" in bound_func
21. return func(self, *args2, **kwargs2)
File "/usr/local/lib/python2.7/dist-packages/django/db/transaction.py" in inner
209. return func(*args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/options.py" in add_view
956. self.save_related(request, form, formsets, False)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/options.py" in save_related
733. self.save_formset(request, form, formset, change=change)
File "/usr/local/lib/python2.7/dist-packages/django/contrib/admin/options.py" in save_formset
721. formset.save()
File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save
497. return self.save_existing_objects(commit) + self.save_new_objects(commit)
File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save_new_objects
628. self.new_objects.append(self.save_new(form, commit=commit))
File "/usr/local/lib/python2.7/dist-packages/django/forms/models.py" in save_new
731. obj.save()
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save
463. self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py" in save_base
551. result = manager._insert([self], fields=fields, return_id=update_pk, using=using, raw=raw)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py" in _insert
203. return insert_query(self.model, objs, fields, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py" in insert_query
1576. return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python2.7/dist-packages/django/db/models/sql/compiler.py" in execute_sql
910. cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/util.py" in execute
40. return self.cursor.execute(sql, params)
File "/usr/local/lib/python2.7/dist-packages/django/db/backends/postgresql_psycopg2/base.py" in execute
52. return self.cursor.execute(query, args)
Exception Type: IntegrityError at /admin/auth/user/add/
Exception Value: duplicate key value violates unique constraint "userprofile_userprofile_user_id_key"
DETAIL: Key (user_id)=(7) already exists.`
答案 0 :(得分：5)
而不是
def create_user_profile(sender, instance, created, **kwargs):
if created:
UserProfile.objects.create(user=instance)
做一个
def create_user_profile(sender, instance, created, **kwargs):
if created:
UserProfile.objects.get_or_create(user=instance)
即使是编辑，您也在创建新的用户个人资料对象。
答案 1 :(得分：4)
正如CadentOrange在评论中提到的那样，this answer中描述了这个问题的解决方案。
问题在于使用内联管理表单。这里发生了什么：
User）post_save的{{1}}信号处理程序被触发，这会创建一个新的User对象答案 2 :(得分：2)
create_user_profile信号和管理表单尝试创建相同的UserProfile。您可以覆盖LocalUserAdmin以从添加视图中排除UserProfileInline：
class LocalUserAdmin(UserAdmin):
inlines = (UserProfileInline, )
def get_formsets_with_inlines(self, request, obj=None):
for inline in self.get_inline_instances(request, obj):
# hide MyInline in the add view
if isinstance(inline, UserProfileInline) and obj is None:
continue
yield inline.get_formset(request, obj), inline