问未保存的用户信息
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Stack Overflow用户

提问于 2020-01-17 01:53:12

回答 1查看 63关注 0票数 1

我在注册表单中创建了一个字段，询问用户到linkedin个人资料的链接。

我创建了一个页面，返回所有用户(指导者用户)的列表，并注意到我无法访问linkedin链接。我不确定是因为我没有保存链接，还是我没有正确地访问它。

这就是我在models.py上的文章

class User(AbstractUser):
    is_student = models.BooleanField(default=False)
    is_teacher = models.BooleanField(default=False)
...
class Mentor(models.Model):
    user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key=True)
    linkedin = models.URLField(max_length=200,null=True,blank=True)

    def __str__(self):
        return "Profile of user {}".format(self.user.username)

@receiver(post_save,sender=User)
def create_or_update(sender, instance, created, **kwargs):
    if created:
        post_save.connect(create_or_update, sender=User)

forms.py

class TeacherSignUpForm(UserCreationForm):
    email = forms.EmailField(max_length=100)
    first_name = forms.CharField(max_length=100)
    last_name = forms.CharField(max_length=100)
    linkedin = forms.URLField(max_length=200)

    class Meta(UserCreationForm.Meta):
        model = User
        fields = ('email', 'username', 'first_name', 'last_name')

    def save(self, commit=True):
        self.instance.is_teacher = True
        user = super(UserCreationForm, self).save(commit=False)
        user.email = self.cleaned_data['email']
        user.first_name = self.cleaned_data['first_name']
        user.last_name = self.cleaned_data['last_name']
        user.save()
        mentor = Mentor.objects.get_or_create(
            user=user,
            linkedin=self.cleaned_data['linkedin']
        )
        return user

#basic form
class UserForm(forms.ModelForm):
    class Meta:
        model = User
        fields = ('first_name', 'last_name', 'email')

views.py (teachers.py)

class TeacherSignUpView(CreateView):
    model = User
    form_class = TeacherSignUpForm
    template_name = 'registration/signup_form.html'

    def get_context_data(self, **kwargs):
        kwargs['user_type'] = 'teacher'
        return super().get_context_data(**kwargs)

    def form_valid(self, form):
        user = form.save()
        login(self.request, user)
        return redirect('teachers:app-instructor-dashboard')

students.py (视图)

#get list of mentors
def mentor_list(request):
    mentors = User.objects.filter(is_teacher=True).select_related('mentor')
    template_name = 'classroom/students/mentor_list.html'
    context = {'mentors': mentors}
    return render(request, template_name, context)

生成导师列表的html：

                  <ul id="menu-header-menu">
                      {% for user in mentors %}
                          <li><a href="{{ user.mentor.linkedin }}">{{ user.first_name }} {{ user.last_name }}</a></li>
                      {% endfor %}
                  </ul>

从这个列表中，我只得到用户的名字和姓氏，但无法获得他们的linkedin配置文件

python

django

django-models

django-forms

回答 1

Stack Overflow用户

回答已采纳

发布于 2020-01-17 04:04:15

您在这一行中使用了mentor ( mentors = User.objects.filter(is_teacher=True).select_related('mentor') )，但没有在任何地方定义 not 。

表与这一行连接：

user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key=True)

添加related_name .

user = models.OneToOneField(User,on_delete=models.CASCADE,primary_key=True, related_name='mentor')

然后移民和迁移(希望你是熟悉的)。其他一切都很好。

另外，打印这个来验证。

def mentor_list(request):
    mentors = User.objects.filter(is_teacher=True).select_related('mentor')
    # Edited, remember this is just for checking. this is not required
    for user in mentors:
        try:
            print(user.mentor.linkedin)
        except:
             pass
    template_name = 'classroom/students/mentor_list.html'
    context = {'mentors': mentors}
    return render(request, template_name, context)