Question

我将从我的模型字段开始：

class Store(models.Model):
    name = models.CharField(max_length=250)

    def __str__(self):
        return self.name


class Product(models.Model):
    type = models.CharField(max_length=250)

    def __str__(self):
        return self.type


class Receipt(models.Model):
    store = models.ForeignKey(Store)
    date = models.DateField()
    line_items = models.ManyToManyField(Product, through='ReceiptProduct')

    def __str__(self):
        return self.store.name + ': ' + str(self.date)


class ReceiptProduct(models.Model):
    receipt = models.ForeignKey(Receipt)
    product = models.ForeignKey(Product)
    price = models.FloatField()
    description = models.CharField(max_length=500, null=True, blank=True)

    def __str__(self):
        return self.product.type

我想要做的是为ReceiptProduct模型创建一个表单。

class AddItemForm(ModelForm):
    class Meta:
        model = ReceiptProduct
        fields = ['product', 'price', 'description']

完成。和观点？

def add_receipt_product(request, receipt_id):
    current_receipt = Receipt.objects.get(id=receipt_id)
    if request.method != 'POST':
        # No data submitted; create a blank form.
        form = AddItemForm(initial={'receipt': current_receipt})
    else:
        # POST data submitted; process data.
        form = AddItemForm(data=request.POST)
        if form.is_valid():
            new_product = form.save(commit=False)
            new_product.receipt = current_receipt
            new_product.save()
            return HttpResponseRedirect(reverse('purchase_log:receipt_details', args=[receipt_id]))

    context = {'current_receipt': current_receipt, 'form': form}
    return render(request, 'purchase_log/add_receipt_product_form.html', context)

好的，我想做的是，在“产品”字段（这是一个由产品型号填充的下拉菜单）下，有一个名为“自定义产品”的选项，即用户可以选择将项目添加到产品型号，然后将显示在将来的下拉菜单中。这可行吗？先谢谢大家!!

Answer 1

Django根据a "formset"实现了这一点。查看本教程以获取更多信息：http://whoisnicoleharris.com/2015/01/06/implementing-django-formsets.html我认为那里的示例与您的示例非常相似。

在Django管理界面中，事情变得更容易，您可以使用Inline。

如何为外键字段创建一个表单，该表单具有django中带有“添加项目”选项的下拉菜单？

1 个答案: