DateField——“输入有效日期”消息

Question

我有点困惑为什么它不断返回“输入有效日期”消息。是我的格式问题吗？

我尝试过 %m-%d-%Y 的不同组合，但仍然没有成功。

模型.py

class DeliveryDate(models.Model):
    cart = models.ForeignKey('Cart', null=True, blank=True)
    date = models.DateField()

    def __str__(self):
        return str(self.cart.id)
        return self.date

视图.py

def add_delivery_date(request):

    the_id = request.session['cart_id']
    cart = Cart.objects.get(id=the_id)

    form = DeliveryDateForm(request.POST or None)

    if request.method == "POST":
        if form.is_valid():
            delivery_date = form.save(commit=False)
            date = request.POST['date']

            delivery_date = DeliveryDate.objects.create(cart=cart, date=date)
            delivery_date.save()

            return HttpResponseRedirect('thank-you.html')

    context = {
        "form": form
    }


    return render(request, 'choose_delivery_date.html', context)

表格.py

class DeliveryDateForm(forms.ModelForm):
    date = forms.DateField(input_formats=['%m %d %Y'], widget=SelectDateWidget, initial=datetime.date.today())

    class Meta:
        model = DeliveryDate
        fields = ['date']

Answer 1

首先，在 Django ModelForm 中，我们更改日期模型字段的小部件，而不添加额外的字段。这是在 __ init __ 方法中完成的：

from django.forms.extras.widgets import SelectDateWidget

class DeliveryDateForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super(DeliveryDateForm, self).__init__(*args, **kwargs)
        #Change date field's widget here
        self.fields['date'].widget = SelectDateWidget()

    class Meta:
        model = DeliveryDate
        fields = ['date']

通过像你一样添加一个字段：

class DeliveryDateForm(forms.ModelForm):
    date = forms.DateField(input_formats=['%m %d %Y'], widget=SelectDateWidget, initial=datetime.date.today())

实际上是向您的 ModelForm 添加一个额外的 FormField，其名称与 ModelField 相同。通过这种方式，您只需将绑定的日期 ModelField 小部件更改为日/月/年的 3 个选择

其次，您的表单验证非常奇怪：我通常写的内容如下：

def add_delivery_date(request):

    the_id = request.session['cart_id']
    cart = Cart.objects.get(id=the_id)

    form = DeliveryDateForm()
    if request.method == "POST":
        form = DeliveryDate(data=request.POST)
        if form.is_valid():
            delivery_date = form.save(commit=False)
            delivery_date.cart = cart 
            delivery_date.save()
            return HttpResponseRedirect('thank-you.html')

    return render(request, 'choose_delivery_date.html', {
        'form': form
    })