Question

我有一个ModelForm的HTML视图，我正在尝试使用一个名为scanner_input的单独用户输入，在其上运行一些代码，然后用代码I中的结果替换request.post['product_id']刚跑了

Everywhere I look，它说同样的事情，使用.copy（）可以使request.post对象可变，但我收到以下错误消息：< / p>

'SerialInstanceForm' object does not support item assignment

从我看来，此行中出现错误：

post['product_id'] = scanner_input_list[i]

以下是我的观点：

def SerialMulti(request):
    if request.method == "POST":
        form = SerialInstanceForm(request.POST)
        if form.is_valid():
            scanner_input = request.POST['scanner_input']
            scanner_input_list = scanner_input.splitlines()

            for i in range(0, len(scanner_input_list)):
                post = SerialInstanceForm(request.POST.copy())
                post['product_id'] = scanner_input_list[i]
                post.save()

        return render(request, 'serial_multi.html', {'form': form})
    else:
        form = SerialInstanceForm()
    return render(request, 'serial_multi.html', {'form': form})

我的模特：

class ProductSerialInstance(models.Model):
    STATUS_CHOICES = (
        ('in_inventory', 'In Stock'),
        ('given_out', 'Given Out'),
        ('repair', 'Repair')
    )

    name = models.ForeignKey(ProductSerial)
    employee = models.ForeignKey(Employee, blank=True, null=True)
    it_dep = models.ForeignKey(ItDep)
    product_id = models.CharField(max_length=50)
    status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='draft')
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    def __unicode__(self):
        return self.name

我的表格：

class SerialInstanceForm(forms.ModelForm):
    # duplications = forms.IntegerField()
    class Meta:
        model = ProductSerialInstance
        fields = ['name','employee','it_dep','status']

Answer 1

根据您的说法，我根据自己的想法编辑了您的观点，我不知道这项工作是否成功，但肯定能帮助你理解一些事情。

您不需要发出request.POST可变，以获取数据。

def SerialMulti(request):
    if request.method == "POST":
        form = SerialInstanceForm(request.POST)
        if form.is_valid():
            scanner_input = request.POST.get('scanner_input')
            scanner_input_list = scanner_input.splitlines()

            for i in range(0, len(scanner_input_list)):
                #edited here to make multiple instances save.
                post = ProductSerialInstance.objects.create(**form.cleaned_data)
                post.product_id = scanner_input[i]
                post.save()

        return render(request, 'serial_multi.html', {'form': form})
    else:
        form = SerialInstanceForm()
    return render(request, 'serial_multi.html', {'form': form})

调用.copy（）后，为什么我的request.post对象不可变？

1 个答案: