具有多对多关系的 Django 表单不保存

Question

我有一个自定义注册表单供我的用户在我的应用程序中添加个人资料。但是，最近出现了一个错误，即表单没有保存输入所有字段的信息。

我的用户模型 MyUser 与另一个模型 Interest 存在多对多关系，这就是问题所在。我不确定是 RegistrationForm 还是 register 视图导致的，所以我在下面包括了这两个视图以及模型代码。我还有一个视图供用户更新他们的个人资料，也包括在内，一旦创建，这绝对完美。这是 personal 视图。正如我所说，只有 Interest 字段未返回，即使它已在注册页面上填写。

非常感谢任何帮助或建议，谢谢。

models.py

class Interest(models.Model):
    title = models.TextField()

    def __unicode__(self):
        return self.title

class MyUser(AbstractBaseUser):
    email = models.EmailField(
                        verbose_name='email address',
                        max_length=255,
                        unique=True,
                    )
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=40)
    date_of_birth = models.DateField()
    course = models.ForeignKey(Course, null=True)
    location = models.ForeignKey(Location, null=True)
    interests = models.ManyToManyField(Interest, null=True)
    bio = models.TextField(blank=True)
    is_active = models.BooleanField(default=True)
    is_admin = models.BooleanField(default=False)

    objects = MyUserManager()

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['date_of_birth']

views.py

def register(request):
    if request.method == 'POST':
        form = RegistrationForm(data=request.POST)
        if form.is_valid():
            form.save()
            return redirect('/friends/home/')
    else:
        form = RegistrationForm()

    template = "adduser.html"
    data = { 'form': form, }
    return render_to_response(template, data, context_instance=RequestContext(request))

@login_required(login_url='/friends/login/')
def personal(request):
    """
    Personal data of the user profile
    """
    profile = request.user

    if request.method == "POST":
        form = ProfileForm(request.POST, instance=profile)
        if form.is_valid():
            form.save()
            messages.add_message(request, messages.INFO, _("Your profile information has been updated successfully."))
            return redirect('/friends/success/')
    else:
        form = ProfileForm(instance=profile)

    template = "update_profile.html"
    data = { 'section': 'personal', 'form': form, }
    return render_to_response(template, data, context_instance=RequestContext(request))

forms.py

class RegistrationForm(forms.ModelForm):
    """
    Form for registering a new account.
    """
    email = forms.EmailField(widget=forms.TextInput, label="Email")
    password1 = forms.CharField(widget=forms.PasswordInput,
                                label="Password")
    password2 = forms.CharField(widget=forms.PasswordInput,
                                label="Password (again)")
    course = forms.ModelChoiceField(queryset=Course.objects.order_by('title'))
    location = forms.ModelChoiceField(queryset=Location.objects.order_by('location'))

    class Meta:
        model = MyUser
        fields = [
            'first_name',
            'last_name',
            'date_of_birth',
            'email',
            'password1',
            'password2',
            'course',
            'location',
            'interests',
            'bio',
            ]

    def __init__(self, *args, **kwargs):#Sort interests alphabetically
        super(RegistrationForm, self).__init__(*args, **kwargs)
        self.fields['interests'].queryset = Interest.objects.order_by('title')

    def clean(self):
        cleaned_data = super(RegistrationForm, self).clean()
        if 'password1' in self.cleaned_data and 'password2' in self.cleaned_data:
            if self.cleaned_data['password1'] != self.cleaned_data['password2']:
                raise forms.ValidationError("Passwords don't match. Please enter again.")
        return self.cleaned_data

    def save(self, commit=True):
        user = super(RegistrationForm, self).save(commit=False)
        user.set_password(self.cleaned_data['password1'])
        if commit:
            user.save()
        return user

Answer 1

由于您对 super(RegistrationForm, self).save 调用使用 commit=false，因此它不会保存多对多字段。因此，您需要在 RegistrationForm.

的 save() 方法中的 user.save() 之后添加 self.save_m2m()

见https://docs.djangoproject.com/en/dev/topics/forms/modelforms/#the-save-method

编辑：save_m2m() 在表格上，而不是模型

具有多对多关系的 Django 表单不保存

Django form with many-to-many relationship does not save

django

django-models

django-forms

django-templates

django-views