将值从视图传递到窗体-Django

class Payment(models.Model): deposit_date = models.DateField(blank=True, verbose_name='Deposit Date') file = models.FileField(upload_to=get_file_path) sim = models.ForeignKey(Sim, on_delete=models.DO_NOTHING, null=False, blank=False)

def updatePayment(request, id): sim = get_object_or_404(Sim, pk=id) payment_form = AddPaymentForm(request.POST, request.FILES) if request.method == "POST": sim_form = UpdatePayment(request.POST, instance=sim) try: if payment_form.is_valid() and sim_form.is_valid: sim_form.save() # I am trying to form the value from here payment_form.sim_id = id payment_form.save() messages.success(request, ("Payment has been updated")) else: messages.warning(request, ("Data in fields is incorrect, please try again")) except Exception as e: messages.warning(request, ("Error: {}".format(e))) else: sim_form = UpdatePayment(instance=sim) payment_form = AddPaymentForm(request.POST) context = {'sim_form': sim_form,'payment_form': payment_form,} return render(request, 'payment/updatePayment.html', context)

首先,删除 sim 字段,因为它在模型表单中不是必需的:

class AddPaymentForm(models.Model):
    class Meta:
       model = Payment
       fields = ('deposit_date', 'file')

然后更新视图以保存 模拟 值如下:

def updatePayment(request, id):
    sim  = get_object_or_404(Sim, pk=id)
    if request.method == "POST":
        payment_form = AddPaymentForm(request.POST, request.FILES)
        sim_form = UpdatePayment(request.POST, instance=sim)
        try:
            if  payment_form.is_valid() and sim_form.is_valid():
                sim_form.save()
                payment = payment_form.save(commit=False)
                payment.sim_id = id
                payment.save()
                messages.success(request, ("Payment has been updated"))
            else:
                messages.warning(request, ("Data in fields is incorrect, please try again"))
        except Exception as e:
            messages.warning(request, ("Error: {}".format(e)))
    else:
        sim_form = UpdatePayment(instance=sim)
        payment_form = AddPaymentForm()
    context = {'sim_form': sim_form,'payment_form': payment_form,}
    return render(request, 'payment/updatePayment.html', context)

这是我用的 payment_form.save(commit=False) 生成 Payment 尚未保存到数据库的对象。然后我分配 sim_id 并使用 .save() 方法。