将ForeignKey保存在django的post中

Question

我有问题，以保存在侵权人表上的fk在邮政。当我添加记录时，我试图保存客户ID。为了解决疑难问题，我增加了几行打印行，这是输出。正如您在下面看到的，正确的客户ID是存在的，但是客户是空的，所以它没有被保存到记录中。其他的字段保存得很好。请帮帮忙！我是个初学者。

forms.py中的客户为2

保存forms.py实例时，客户没有保存

views.py中的客户为2

在views.py中成功地保存了侵权者与其客户无

views.py

@login_required(login_url='login') def createInfringer(请求)：customer=request.user.customer.id表单= InfringerForm(customer=customer)如果request.method == 'POST'：form = InfringerForm(customer，( request.POST)如果form.is_valid()：saved_instance = form.save( customer ) print (f'customer in views.py is {customer}')打印(f‘成功地用客户{saved_instance.customer}保存了views.py中的侵权者)返回重定向(’侵权者列表‘)上下文={'form'：form}返回呈现(请求，’base/合成_form.html‘，上下文)

forms.py

类InfringerForm(ModelForm)：class Meta: model =侵权人字段= 'name'，‘name_name’，'status‘def __init__(self，customer，*args，**kwargs)：super(InfringerForm，self).__init__(*args，**kwargs) .__init__( *args，**kwargs).save( *args，**kwargs)如果客户: print (f'customer in forms.py is { customer }') self.customer = customer instance.save() print (f‘forms.py实例保存在customer {instance.customer}')返回实例

models.py

类侵权者(models.Model)：name = models.CharField(max_length=200) brand_name = models.CharField(max_length=200，null=True) updated = models.DateTimeField(auto_now=True) created = models.DateTimeField(auto_now_add=True) status = models.ForeignKey(Status，on_delete=models.SET_NULL，null=True) customer = models.ForeignKey(Customer，on_delete=models.SET_NULL，null=True) class Meta: ordering = '-updated'，'-created‘def __str__(self)：返回self.name

Answer 1

它可能有助于简化表单，例如：

class InfringerForm(ModelForm):
   class Meta:
       model = Infringer
       fields = ['name', 'brand_name', 'status']  

    def __init__(self, customer, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.customer = customer
        self.fields['status'].queryset = Status.objects.filter(customer=customer)

    def save(self, *args, **kwargs):
        self.instance.customer = self.customer
        return super().save( *args, **kwargs)

完成后，我们还可以将视图逻辑简化为：

@login_required(login_url='login')
def createInfringer(request):
    customer = request.user.customer
    form = InfringerForm(customer=customer)
    if request.method == 'POST':
        form = InfringerForm(customer, request.POST, request.FILES)
        if form.is_valid():   
            saved_instance = form.save()
            print (f'customer in views.py is {customer}')
            print (f'Successfully saved the infringer in views.py with its customer {saved_instance.customer}')
            return redirect('infringer-list')

    return render (request, 'base/infringement_form.html', {'form': form})

因此，我们使用的是客户，而不是它的主键，我们不再需要在.save()方法中传递客户。