class Organizer(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE, primary_key=True)
name = models.CharField(max_length=100)
# ... some other fields
class EventTemplate(models.Model):
title = models.CharField(max_length=255)
category = models.ForeignKey(Category)
organizer = models.ForeignKey(Organizer)
photo = models.ImageField(upload_to=event_directory_path)
# ... some other fields
Organizer的主键也是与用户的OneToOne关系。 然后我使用CreateView插入一个新的EventTemplate：
class AddEventTemplateCreateView(CreateView):
model = EventTemplate
fields = ['title', 'category', 'organizer']
success_url = reverse_lazy('myapp:organizer-account')
但是在保存时，AddEventTemplateCreateView上的POST操作（在urls.py中映射为＆＃34; add-event＆＃34;）会出现此错误：
/ add-event /
中的AttributeError＆＃39;组织者＆＃39;对象没有属性＆＃39; id＆＃39;
在调试时我确认EventTemplate和属性Organizer的所有属性都已正确绑定。 类别没有错误，但类别有一个属性＆＃34; id＆＃34;，而组织者只有一个属性＆＃34; user_id＆＃34;作为PK。 我认为他正试图获得一处房产＆＃34; id＆＃34;按照组织者的惯例。 我可以尝试修改Organizer模型，删除显式的primary_key，然后依靠自动PK＆＃39; id，但在我看来，这是一个无用的重复。
是否需要设置任何属性，某些解决方案或建议才能使其正常工作？或者它无法使用CreateView完成？
谢谢！
修改 完整的追溯是：
Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/add-event/
Django Version: 1.9.4
Python Version: 3.4.2
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'ubivado',
'bootstrapform']
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 "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
149. response = self.process_exception_by_middleware(e, request)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/core/handlers/base.py" in get_response
147. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/views/generic/base.py" in view
68. return self.dispatch(request, *args, **kwargs)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/views/generic/base.py" in dispatch
88. return handler(request, *args, **kwargs)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/views/generic/edit.py" in post
256. return super(BaseCreateView, self).post(request, *args, **kwargs)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/views/generic/edit.py" in post
222. return self.form_valid(form)
File "/Users/redpelle/PycharmProjects/ubivado/ubivado_project/ubivado/views.py" in form_valid
46. return super(AddEventTemplateCreateView, self).form_valid(form)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/views/generic/edit.py" in form_valid
201. self.object = form.save()
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/forms/models.py" in save
451. self.instance.save()
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/base.py" in save
700. force_update=force_update, update_fields=update_fields)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/base.py" in save_base
728. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/base.py" in _save_table
812. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/base.py" in _do_insert
851. using=using, raw=raw)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/manager.py" in manager_method
122. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/query.py" in _insert
1039. return query.get_compiler(using=using).execute_sql(return_id)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in execute_sql
1059. for sql, params in self.as_sql():
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in as_sql
1019. for obj in self.query.objs
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in <listcomp>
1019. for obj in self.query.objs
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in <listcomp>
1018. [self.prepare_value(field, self.pre_save_val(field, obj)) for field in fields]
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/sql/compiler.py" in pre_save_val
968. return field.pre_save(obj, add=True)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/fields/files.py" in pre_save
311. file.save(file.name, file, save=False)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/fields/files.py" in save
90. name = self.field.generate_filename(self.instance, name)
File "/Users/redpelle/PycharmProjects/ubivado/env/lib/python3.4/site-packages/django/db/models/fields/files.py" in generate_filename
328. directory_name, filename = os.path.split(self.upload_to(instance, filename))
File "/Users/redpelle/PycharmProjects/ubivado/ubivado_project/ubivado/models.py" in event_directory_path
10. return 'events/org_{0}/{1}/{2}'.format(instance.organizer.id, time.strftime("%Y-%m-%d"), filename)
Exception Type: AttributeError at /add-event/
Exception Value: 'Organizer' object has no attribute 'id'
编辑2（已解决）：
在models.py中，我有：
def event_directory_path(instance, filename):
# file will be uploaded to MEDIA_ROOT/user_<id>/<filename>
return 'events/org_{0}/{1}/{2}'.format(instance.organizer.id, time.strftime("%Y-%m-%d"), filename)
我必须更正instance.organizer.id中的instance.organizer.user_id。
我没有注意到，因为PyCharm建议我一个＆＃34; id＆＃34;具有自动完成功能的字段。谢谢@Daniel Roseman