Question

我正在使用Django表单更新项目的数量，虽然在我看来我的所有内容都是正确的，但是当我点击“提交”时，表单实际上并没有更新数量。值得注意的是，我也没有收到任何错误 - 就像表格被接受一样。

在forms.py中：

class ChangeQty(forms.Form):
    quantity = forms.IntegerField(label='', min_value=1, widget=forms.NumberInput())

    class Meta:
        model = Item
        fields = 'quantity'

    def __init__(self, *args, **kwargs):
        super(ChangeQty, self).__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_show_labels = False
        self.helper.form_id = 'id-exampleForm'
        self.helper.form_class = 'blueForms'
        self.helper.form_method = 'post'
        self.helper.form_action = 'submit'
        self.helper.add_input(Submit('submit', 'Update', css_class='btn btn-md btn-primary'))

        self.helper.layout = Layout(
            Field('quantity', placeholder='Qty'),
        )

在cart.py中

def add(self, product, unit_price, quantity):
    try:
        item = models.Item.objects.get(
            cart=self.cart,
            product=product,
        )
    except models.Item.DoesNotExist:
        item = models.Item()
        item.cart = self.cart
        item.product = product
        item.unit_price = unit_price
        item.quantity = 1
        item.save()
    else: #ItemAlreadyExists
        item.unit_price = unit_price
        item.quantity = int(quantity)
        item.save()

在views.py

中

def specific_qty(request, product_id, quantity):
    if request.method == 'POST':
        form = ChangeQty(request.POST)
        if form.is_valid():
            cart = Cart(request)
            cart.add(product_id, product.price, form.get('quantity'))
            return render_to_response("full_cart.html", dict(cart=Cart(request)), context_instance=RequestContext(request))
    else:
        form = ChangeQty()

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

最后，在full_cart.html中：

<li>Quantity:
    <form class="col-md-8 col-md-offset-2" action="." method="post">
        {% csrf_token %}
        <input id="quantity" type="text" name="quantity" value="{{item.quantity}}">
        <input class='btn btn-md btn-primary' type="submit" value="Update">
    </form>
</li>

Django表格更新数量

0 个答案: