在django数据库中插入foregin键

Mihael Waschl • 7 年前 • 2264 次点击

我正在构建Django应用程序,用户在其中选择一个公司,然后应用程序通过URL传递公司主键。用户可以重定向到可以看到所有公司设备的页面,并可以将新设备添加到列表中。现在我有问题了。当我提交包含所有数据的表单时,我总是会得到相同的验证错误,这告诉我需要公司字段(我在验证前向表单添加了foregin键)。我做错了什么?

查看:

def network_devices(request, pk=None):
    if pk:
        if request.method == 'POST':

            if 'dodajnapravo' in request.POST:
                devices_form = AddNetworkDevice(request.POST)
                devices_form.company = pk
                if devices_form.is_valid():
                    devices_form.save()
                    return redirect(network_devices)

                else:
                    messages.error(request, 'VneÅ¡eni podatki niso pravilni!')
                    return redirect(network_devices)

        elif request.method == 'GET':
            devices_form = AddNetworkDevice()
            devices = NetworkDevices.objects.filter(company_id=pk).all()
            print(devices)
            return render(request, 'interface/network_devices.html', {'device_form': devices_form, 'page_title': 'Naprave',
                                                                  'devices': devices})

    else:
         return redirect(add_select_company)

PYS:

class AddNetworkDevice(forms.ModelForm):
     vendor = forms.CharField(required=True, label='Proizvajalec', max_length=100)
     product = forms.CharField(required=True, label='Produkt', max_length=100)
     version = forms.CharField(required=False, label='Verzija', max_length=50)

    class Meta:
         model = NetworkDevices
         fields = ('__all__')

模型:

class Company(models.Model):
    class Meta:
        verbose_name_plural = 'Podjetja'

    company_name = models.CharField(max_length=150)
    company_addres = models.CharField(max_length=500)

    def __str__(self):
        return str('{}').format(self.company_name)


class NetworkDevices(models.Model):
    class Meta:
        verbose_name_plural = 'Naprave v OmreÅ¾ju'

    company = models.ForeignKey(Company, on_delete=models.CASCADE)
    vendor = models.CharField(max_length=100)
    product = models.CharField(max_length=100)
    version = models.CharField(max_length=50)

如果你能帮我解决这个问题,我会很高兴的。

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文章 [ 2 ] | 最新文章 7 年前

• 1 楼

Debendra 7 年前

我在上面的注释中指定了,您有3个字段 forms.py 4个字段 models.py 你指定了所有 fields 在字段上使用 表单 .

变化 表单 .

class AddNetworkDevice(forms.ModelForm):
     vendor = forms.CharField(required=True, label='Proizvajalec', max_length=100)
     product = forms.CharField(required=True, label='Produkt', max_length=100)
     version = forms.CharField(required=False, label='Verzija', max_length=50)

    class Meta:
         model = NetworkDevices
         fields = ('vendor', 'product', 'version')  # here is your problem

也可以按排除字段 exclude = ('fields') 根据@Daniel Roseman的回答。

• 2 楼

Daniel Roseman 7 年前

devices_form.company 什么都没用。

如果要手动设置值,则应排除它完全来自表单字段,并将其设置为保存。

class AddNetworkDevice(forms.ModelForm):
    ...
    class Meta:
        model = NetworkDevices
        exclude = ('company',)

…

       if 'dodajnapravo' in request.POST:
            devices_form = AddNetworkDevice(request.POST)
            if devices_form.is_valid():
                device = devices_form.save(commit=False)
                device.company_id = pk
                device.save()
                return redirect(network_devices)

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