我犯了一个错误："AttributeError at /uz/AttributeError/update/ 'str‘对象没有属性'_meta’“

Question

当您单击“保存”按钮时，会出现上述错误，但在文档中，我认为我输入了正确的参数。这段代码在我的views.py中的位置：

class AllUserUpdate(LoginRequiredMixin, View):
def get(self, request, *args, **kwargs):
    alluser = CustomUser.objects.get(username=self.request.user.username)
    form = CustomUserForm(instance=alluser)
    context = {'form':form}
    return render(request, 'account/AllUserAccount.html', context)

def post(self, request, *args, **kwargs):
    form = CustomUserForm(self.request.POST, self.request.FILES, instance=self.request.user.username)
    if form.is_valid():
        form.save()
        messages.info(self.request, "Your are change successfully created!")
        context = {'form': form}
        return redirect('all_user_update')

这就是我的模板的样子：

<form  method="post" enctype="multipart/form-data">
            {% csrf_token %}
                <h3>Full name: {{ request.user.full_name }}</h3>
                {{ form.as_p }}
                <input type="submit" class=" btn btn-primary" value="Save">
        </form>

forms.py：

class CustomUserForm(UserCreationForm):
password1 = forms.CharField(widget=forms.PasswordInput(
    attrs={'class': 'form-control mt-2', 'name': 'password1', 'placeholder': 'enter the password...'}))
password2 = forms.CharField(widget=forms.PasswordInput(
    attrs={'class': 'form-control mt-2', 'name': 'password2', 'placeholder': 'Repeat the password...'}))

class Meta:
    model = CustomUser
    fields = ('full_name', 'email', 'user_type', 'phone', 'password1', 'password2', 'username')
    widgets = {
        'full_name': forms.TextInput(attrs={'class': 'form-control mt-2', 'name': 'full_name'}),
        'username': forms.TextInput(attrs={'class': 'form-control mt-2', 'name': 'username'}),
        'email': forms.EmailInput(attrs={'class': 'form-control mt-2', 'name': 'email'}),
        'phone': forms.TextInput(attrs={'class': 'form-control mt-2', 'name': 'phone'}),
        'user_type': forms.Select(attrs={'class': 'form-control mt-2', 'name': 'user_type'}),
    }

​

​

我希望用户更改他们的个人页面。

Answer 1

在这条线上：

    form = CustomUserForm(self.request.POST, self.request.FILES, instance=self.request.user.username)

您正在传递一个字符串(str)作为表单的instance。这不是instance参数所期望的；它需要一个Model实例(就像您在get方法中正确地传递它一样，前面几行)。

将希望作为instance更新的instance传递给您，例如：

    customuser = CustomUser.objects.get(username=request.user.username)
    form = CustomUserForm(request.POST, instance=customuser)