具有多对多关系的Django表单不保存 [英] Django form with many-to-many relationship does not save

问题描述

我有一个自定义注册表单供我的用户添加一个配置文件在我的应用程序。但是，最近出现了一个错误，表单不保存放入所有字段的信息。

I have a custom registration form for my users to add a profile on my app. However, a bug has recently popped up in that the form is not saving the information that is put into all the fields.

我的用户模型 MyUser 与另一个模型 Interest 具有ManyToMany关系，这就是问题的出现。我不知道是否是导致它的 RegistrationForm 或注册视图，所以我已经包括在下面，以及型号代码。
我还有一个看法，用户更新他们的个人资料，一旦创建，也包括，这是非常完美的工作。这是个人视图。
正如我所说，即使它是在注册页面上填写的，只是 Interest 字段未被返回。

My user model, MyUser has a ManyToMany relationship with another model, Interest, and this is where the issues are arising. I am not sure if it is the RegistrationForm or the register view that is causing it, so I have included both below, as well as the model code. I also have a view for the users to update their profile, also included, once it is created, and this is working absolutely perfectly. This is the personal view. As I say, it is only the Interest field that is not being returned, even though it is being filled in on the registration page.

非常感谢任何帮助或建议。

Any help or advice is much appreciated, thanks.

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

推荐答案

由于您使用 commit = false super（RegistrationForm，self）.save call，它不保存多对多字段，因此需要添加 self.save_m2m在 save（）方法中 user.save（）之后， c $ c> RegistrationForm 。

Since you use commit=false for the super(RegistrationForm, self).save call, it doesn't save the many-to-many field. You therefore need to add self.save_m2m() after user.save() in your save() method of RegistrationForm.

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

编辑： save_m2m（）在表单上，​​而不是模型

save_m2m() is on the Form, not the Model

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