我扩展了 Django 用户模型并添加了我自己的字段，目前正在注册期间填写这些字段。该表单似乎工作正常，除了保存之外，其他所有内容。
我用这个来帮助我。
下面是用户模型的扩展：
class StudentProfile(models.Model):
user = models.OneToOneField(User, null = True, related_name='user', on_delete=models.CASCADE)
teacher = models.BooleanField(default = False)
school = models.CharField(max_length = 50)
def create_StudentProfile(sender, **kwargs):
if kwargs['created']:
user_profile = StudentProfile.objects.create(user = kwargs['instance'])
post_save.connect(create_StudentProfile, sender = User)
这是我的表格：
class StudentRegistrationForm(UserCreationForm):
email = forms.EmailField(required = True)
school = forms.CharField(required = True)
def __init__(self, *args, **kwargs):
super(StudentRegistrationForm, self).__init__(*args, **kwargs)
self.fields['username'].help_text = ''
self.fields['password2'].help_text = ''
class Meta:
model = User
fields = (
'username',
'first_name',
'last_name',
'email',
'school',
'password1',
'password2'
)
def save(self, commit = True):
user = super(StudentRegistrationForm, self).save(commit = False)
user.first_name = self.cleaned_data['first_name']
user.last_name = self.cleaned_data['last_name']
user.email = self.cleaned_data['email']
student_profile = StudentProfile(user = user, school = self.cleaned_data['school'])
if commit:
user.save()
student_profile.save()
return user, student_profile
以下是我的观点：
def registration(request):
if request.method == 'POST':
form = StudentRegistrationForm(request.POST)
if form.is_valid():
user, user_profile = form.save(commit = False)
form.save()
return render(request, 'accounts/home.html')
else:
args = {'form': form}
return render(request, 'accounts/reg_form.html', args)
else:
form = StudentRegistrationForm()
args = {'form': form}
return render(request, 'accounts/reg_form.html', args)
这是我的回溯：
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
64. return self.cursor.execute(sql, params)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py" in execute
337. return Database.Cursor.execute(self, query, params)
The above exception (NOT NULL constraint failed: userprofile_studentprofile.user_id) was the direct cause of the following exception:
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
39. response = get_response(request)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
187. response = self.process_exception_by_middleware(e, request)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/wtreston/GDrive/LesRev/lesssonreview/userprofile/views.py" in registration
13. form.save()
File "/Users/wtreston/GDrive/LesRev/lesssonreview/userprofile/forms.py" in save
41. student_profile.save()
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/base.py" in save
796. force_update=force_update, update_fields=update_fields)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/base.py" in save_base
824. updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/base.py" in _save_table
908. result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/base.py" in _do_insert
947. using=using, raw=raw)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/manager.py" in manager_method
85. return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/query.py" in _insert
1045. return query.get_compiler(using=using).execute_sql(return_id)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/sql/compiler.py" in execute_sql
1054. cursor.execute(sql, params)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
79. return super(CursorDebugWrapper, self).execute(sql, params)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
64. return self.cursor.execute(sql, params)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/utils.py" in __exit__
94. six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/utils/six.py" in reraise
685. raise value.with_traceback(tb)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/backends/utils.py" in execute
64. return self.cursor.execute(sql, params)
File "/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/backends/sqlite3/base.py" in execute
337. return Database.Cursor.execute(self, query, params)
Exception Type: IntegrityError at /users/
Exception Value: NOT NULL constraint failed: userprofile_studentprofile.user_id
谢谢！
您必须
使用模型创建一个用户User然后您必须将此用户传递给StudentProfile因为它是您StudentProfile onetoone字段。
def save(self, request):
form = StudentRegistrationForm(request.POST)
user = User.objects.create(first_name=form.cleaned_data['first_name'],
last_name=form.cleaned_data['last_name'],
email=form.cleaned_data['email'],
username=form.cleaned_data['username'])
user_profile = StudentProfile.objects.create(user=user,
teacher=form.cleaned_data['teacher'],
school=form.cleaned_data['school'])
return user, student_profile
看起来 use 对象没有被保存，以便它可以存储其引用的学生配置文件模型。
这里有许多问题。
直接的问题是您在两个地方创建用户配置文件。你已注册了一个信号处理程序 - create_StudentProfile - 在创建用户时自动创建一个;但是，您还将在窗体的save方法中创建一个新方法。
您应该考虑是否真的需要该信号处理程序。如果您总是要通过此表单创建用户，则该处理程序是不必要的。
如果您决定需要信号，则需要重做保存方法以考虑它。像这样：
def save(self, commit=True):
user = super(StudentRegistrationForm, self).save(commit = False)
if commit:
user.save()
profile = user.userprofile
else:
profile = UserProfile(user=user)
profile.school = self.cleaned_data['school']
if commit:
profile.save()
return user, student_profile
您会注意到，无需设置电子邮件和名称，因为这些是通过超级通话中已有的表单完成的。
第二个问题是您在视图中调用了两次 save 方法。别这样。
if form.is_valid():
user, user_profile = form.save()
return render(request, 'accounts/home.html')