如何在views.py中请求.user.is_authenticated()？姜戈

Question

我正在尝试检查用户是否从我的 views.py 文件中登录。取决于用户是否登录，它应该返回不同的表单。但是 request.user.is_authenticated() 或 request.user.is_authenticated 不起作用，我总是得到 True 值。

我的看法：

def ContactsView(request):
    form_class = ContactForm_logged(request=request)
    form_class_nonlogged = ContactForm_nonlogged(request=request)

    # new logic!
    if request.method == 'POST':
        if request.user.is_authenticated():
            form = ContactForm_logged(data=request.POST, request = request)
        else:
            form = ContactForm_nonlogged(data=request.POST)

        if form.is_valid():
            contact_name = request.POST.get(
                'contact_name'
                , '')
            contact_email = request.POST.get(
                'contact_email'
                , '')
            form_content = request.POST.get('content', '')
            subjects = form.cleaned_data['subjects']
            subjects = dict(form.fields['subjects'].choices)[subjects]
            # Email the profile with the
            # contact information
            template = get_template('threeD/email/contact_template.txt')
            context = Context({
                'contact_name': contact_name,
                'subjects': subjects,
                'contact_email': contact_email,
                'form_content': form_content,
            })
            content = template.render(context)

            email = EmailMessage(
                "New message from " + contact_name,
                content,
                "Message - " + subjects + ' ',
                ['smart.3d.printing.facility@gmail.com'],
                headers={'Reply-To': contact_email}
            )
            email.send()
            messages.success(request, "Thank you for your message.")
            return redirect('/index/contacts/')

    else:
        if request.user.is_authenticated():
            form = ContactForm_logged(request=request)
        else:
            form = ContactForm_nonlogged()

    if request.user.is_authenticated():
        return render(request, 'threeD/contacts.html', {
            'form': form_class,
        })
    else:
        return render(request, 'threeD/contacts.html', {
            'form': form_class_nonlogged,
        })

还有我的两个表格：

class ContactForm_logged(forms.Form):
    contact_name = forms.CharField(required=True)
    contact_email = forms.EmailField(required=True)
    subjects = forms.ChoiceField(choices=emailsubjects)
    content = forms.CharField(
        required=True,
        widget=forms.Textarea
    )

    def __init__(self, *args, **kwargs):
        self.request = kwargs.pop("request")
        super(ContactForm_logged, self).__init__(*args, **kwargs)
        self.fields['contact_name'].label = "Your name:"

        if (self.request.user.first_name == '' or self.request.user.last_name ==''):
            self.fields['contact_name'].initial = 'Type your name here'
            self.fields['contact_name'].widget.attrs['readonly'] = False
        else:
            self.fields['contact_name'].initial = self.request.user.first_name
            self.fields['contact_name'].widget.attrs['readonly'] = True

        self.fields['contact_email'].label = "Your email:"

        if (self.request.user.profile.sdu_email == ''):
            if (self.request.user.email == ''):
                self.fields['contact_email'].initial = 'Type your email here'
                self.fields['contact_email'].widget.attrs['readonly'] = False
            else:
                self.fields['contact_email'].initial = self.request.user.email
                self.fields['contact_email'].widget.attrs['readonly'] = True
        else:
            self.fields['contact_email'].initial = self.request.user.profile.sdu_email
            self.fields['contact_email'].widget.attrs['readonly'] = True

        self.fields['content'].label = "What do you want to say?"
        self.fields['content'].initial = "Dear, Smart 3D printing facility team, I like this WEB server very much, but ..."

        self.fields['subjects'].label = "Please, select the subject of your message"


class ContactForm_nonlogged(forms.Form):
    contact_name = forms.CharField(required=True)
    contact_email = forms.EmailField(required=True)
    subjects = forms.ChoiceField(choices=emailsubjects)
    content = forms.CharField(
        required=True,
        widget=forms.Textarea
    )

    def __init__(self, *args, **kwargs):
        self.request = kwargs.pop("request")
        super(ContactForm_nonlogged, self).__init__(*args, **kwargs)
        self.fields['contact_name'].label = "Your name:"

        self.fields['contact_name'].initial = 'Type your name here'

        self.fields['contact_email'].label = "Your email:"

        self.fields['contact_email'].initial = 'Type your email here'

        self.fields['content'].label = "What do you want to say?"
        self.fields['content'].initial = "Dear, Smart 3D printing facility team, I like this WEB server very much, but ..."

        self.fields['subjects'].label = "Please, select the subject of your message"

问题是，无论我是否登录，我总是会返回 ContactForm_logged 表单。如果我没有登录，则返回 ContactForm_logged 表单我会收到错误消息，即“'AnonymousUser' 对象没有属性'first_name'”。 我在论坛上读到，如果我调用 request.user.is_authenticated() 错误，可能会发生这种情况，但我尝试了 request.user.is_authenticated() 和 request.user.is_authenticated，两者都给了我同样的错误：/

任何帮助将不胜感激！

Answer 1

如果您使用的是 Django 1.10+，那么您应该使用属性request.user.is_authenticated。

如果您使用的是 Django 1.9 或更早版本，则必须使用 request.user.is_authenticated()。在 Django 1.9 或更早版本中使用 request.user.is_authenticated 是一个错误，可能导致敏感数据泄露，因为它总是会被评估为 True。

如果您使用的是正确的版本并且它返回True，则表明您确实已登录。

Answer 2

问题出在视图方法定义的第一行：

def ContactsView(request):
    form_class = ContactForm_logged(request=request)

在这里，您正在创建ContactForm_logged 类的实例。每次调用视图方法时都会执行此行。因此，无论用户是否登录，每次都会创建一个 ContactForm_logged 类的实例。此外，在ContactForm_logged 类的__init__ 方法中，您正在访问self.request.user.first_name。因此，当 ContactForm_logged 实例为未经身份验证的请求初始化时，它会引发错误：“'AnonymousUser' object has no attribute 'first_name'”