Django：具有其他字段的CreateView？ [英] Django: CreateView with additional field?

问题描述

我正在尝试编写Django CreateView（CBV），它使用用户电子邮件代替用户ID，并根据电子邮件确定（或创建）用户。

I am trying to program a Django CreateView (CBV), which takes instead of the user id the user email and determines (or creates) the user based on the email.

我的模型不包含任何特殊内容：

My model does not contain anything special:

class Project(models.Model):
    name = models.CharField(_('Title'), max_length=100,)
    user = models.ForeignKey(User, verbose_name=_('user'),)
    ...

我的forms.py在表单中添加了其他电子邮件字段：

My forms.py adds the additional email field to the form:

class ProjectCreateForm(forms.ModelForm):
    email = forms.EmailField(required=True, )

    class Meta:
        model = Project
        fields = ('name', ...,)

在我看来。 py，我正在尝试确定用户是否存在或应该创建该用户。在这两种情况下，都应将用户ID保存为Project实例的一部分。

In my views.py, I am trying to determine if the user exists or should be created. In both cases, the user id should be saved as part of the Project instance.

class ProjectCreateDetails(CreateView):
    form_class = ProjectCreateForm
    template_name = '...'
    success_url = reverse_lazy('login') 
    model = Project

    def form_valid(self, form):
        try:
            user = User.objects.get(email=form.email)
        except User.DoesNotExist:
            user = User.objects.create_user(form.email, form.email, ''.join([random.choice(string.digits + string.letters) for i in range(0, 10)]))
            user.save()
        form.instance.user = user
        return super(ProjectCreateDetails, self).form_valid(form)

但是我遇到一个错误，即'解决方案'对象没有属性'电子邮件'。

However I am facing an error that the 'Solution' object has no attribute 'email'.

是否需要切换到FormView而非CreateView？

Do I need to switch to a FormView instead of a CreateView?

推荐答案

您收到错误'Solution'对象没有属性'email'，因为 form.email 无效。验证数据永远不能用作表单或模型表单的属性。当表单（包括模型表单）有效时， form.cleaned_data 字典。

You get the error 'Solution' object has no attribute 'email' because form.email is invalid. Validated data is never available as attributes of a form or model form. When forms (including model forms) are valid, the successfully validated data is available in the form.cleaned_data dictionary.

请注意，不需要调用 user.save（）。 create_user 调用已将用户添加到数据库中。您也不必生成随机密码-如果密码为 None ，则 create_user 将设置无法使用的密码。

Note that you don't need to call user.save(). The create_user call has already added the user to the database. You don't have to generate a random password either -- if password is None, then create_user will set an unusable password.

最后，请确保您不包括 user ProjectCreateForm 中的c>字段。您可能没有，但是您的代码显示 fields =（'name'，...，），所以我不确定。

Finally, make sure that you do not include the user field in the ProjectCreateForm. You probably do not, but your code says fields = ('name', ...,) so I can't tell for sure.

将其放在一起，您将获得以下（未经测试的）代码：

Put it together and you get the following (untested) code:

def form_valid(self, form):
    try:
        user = User.objects.get(email=form.cleaned_data['email'])
    except User.DoesNotExist:
        user = User.objects.create_user(form.cleaned_data['email'], form.cleaned_data['email']) 
    form.instance.user = user
    return super(ProjectCreateDetails, self).form_valid(form)

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