Question

当我选择编辑时，我试图填充“ CreateDealerForm”中的字段。到目前为止，我只能填充featured_image字段，如果将featured_image添加到窗口小部件字典中，则会得到：'ImageField' object has no attribute 'value_from_datadict'

forms.py

class CreateDealerForm(forms.ModelForm):
    class Meta:
        model = Dealer
        fields = ('name', 'phone','website', 'address', 'featured_image',)
        widgets = {
            'name': forms.TextInput(attrs={'class': 'dealer-name-field', 'placeholder': 'Dealer name'}),
            'phone': forms.TextInput(attrs={'class': 'dealer-phone-field', 'placeholder': 'Dealer phone'}),
            'website': forms.TextInput(attrs={'class': 'dealer-website-field', 'placeholder': 'Dealer website'}),
            'address': forms.TextInput(attrs={'class': 'dealer-address-field', 'placeholder': 'Dealer address'}),
            "featured_image": forms.ImageField(),
        }

views.py

def update_dealer_view(request, slug):
    instance = get_object_or_404(Dealer, slug=slug)
    form = CreateDealerForm(request.POST, request.FILES, instance=instance)
    if form.is_valid():
        dealer = form.save(commit=False)
        dealer.save()
        return redirect('main:homepage_view')

    context = {
        "title": "Update - Dealer",
        "form": form,
        "instance": instance,
    }
    return render(request=request, template_name="main/create/create_dealer.html", context=context)

Answer 1

当请求方法为GET（首次为用户呈现表单以编辑值）时，您将无法处理这种情况。您需要处理这种情况，并且不要将数据传递给表单，否则将在不需要时执行验证。

def update_dealer_view(request, slug):
    instance = get_object_or_404(Dealer, slug=slug)
    if request.method == 'POST':
        form = CreateDealerForm(request.POST, request.FILES, instance=instance)
        if form.is_valid():
            dealer = form.save()
            return redirect('main:homepage_view')
    else:
        form = CreateDealerForm(instance=instance)
    context = {
        "title": "Update - Dealer",
        "form": form,
        "instance": instance,
    }
    return render(request=request, template_name="main/create/create_dealer.html", context=context)

'ImageField'对象没有属性'value_from_datadict'

1 个答案: