form.cleaned_data 返回空集

Question

我有一个表格：

class OrderForm(forms.Form):
    delivery_time = models.CharField(max_length=100)
    address_city = models.CharField(max_length=40)
    address_street = models.CharField(max_length=40)
    address_building = models.CharField(max_length=40)

这是我的看法：

def submit(request):
    args = {}
    args['form'] = OrderForm()
    if request.POST:
        order_form = OrderForm(request.POST)
        if order_form.is_valid():
            user = request.user
            address_city = order_form.cleaned_data.get('address_city')
            address_street = order_form.cleaned_data.get('address_street')
            address_building = order_form.cleaned_data.get('address_building')
            delivery_time = order_form.cleaned_data.get('delivery_time')
            new_order = Order(address_city=address_city,
                              address_street=address_street,
                              address_building=address_building,
                              delivery_date=delivery_time, client=user)
            new_order.save()
            Basket.objects.filter(client=user).delete()
            return redirect('/order/')
        else:
            args['form'] = order_form
    else:
        return render(request, 'order_page.html', args)

我猜这个问题出在我的模板上：

<form class="form-horizontal" action="{% url 'order_submit' %}" method="post">
        {% csrf_token %}   
        <div class="control-group">
            <label class="control-label" for="address">City<sup>*</sup></label>
            <div class="controls">
                <input type="text" id="address" placeholder="City name" name="address_city">
            </div>
        </div>

        ...

我想问题在于我不只使用{{form}}。但我需要这些样式形成我的表单。我对我的注册模板做同样的事情，它可以工作。注册表单继承UserCreationForm并与User模型绑定，但我的OrderForm继承form.Form。会是什么？

Order model:
class Order(models.Model):
    state_choices = ('ACTIVE', 'COMPLETED', 'FROZEN')
    order_date = models.DateTimeField(auto_now_add=True)
    delivery_time = models.CharField(max_length=100)
    address_city = models.CharField(max_length=40)
    address_street = models.CharField(max_length=40)
    address_building = models.CharField(max_length=40)
    state = models.CharField(max_length=200, default='ACTIVE')
    client = models.ForeignKey(CustomUser)

Answer 1

您不应创建form.Form 类来显式处理每个字段。您可以改为从forms.ModelForm 继承并让模型表单为您处理一切。

sthzg 已经指出了问题，但是我仍然坚持您尽可能使用模型形式而不是普通形式。

这是您的表单类和视图的重写版本：

forms.py

class OrderForm(forms.ModelForm):
    class Meta:
        model = Order
        exclude = ['order_date', 'client', 'state']

views.py

def submit(request):
    if request.method == 'POST':
        form = OrderForm(initial={'client': request.user}, data=request.POST)
        if form.is_valid():
            order = form.save(commit=False)
            order.client = request.user
            order.save()
            Basket.objects.filter(client=request.user).delete()
            return redirect('/order/')
        else:
            return render(request, 'order_page.html', {'form': form})
    else:
        return render(request, 'order_page.html', {'form': OrderForm()})

Answer 2

这里的基本问题在于表单的定义。表单不适用于模型字段，而是需要表单字段。只有这样才能正确构建字段。

from django import forms

class OrderForm(forms.Form):
    delivery_time = forms.CharField(max_length=100)
    address_city = forms.CharField(max_length=40)
    address_street = forms.CharField(max_length=40)
    address_building = forms.CharField(max_length=40)

然后尝试在您的模板中输出{{ form }}。

    <form action="foo" method="post">
        {% csrf_token %}   
        {{ form }}
        <input type="submit" value="submit"/>
    </div>