Question

我正在使用Modelforms，并且想设置“ feeder”字段的初始值。我收到以下类型错误：“以10为基数的int（）的无效文字：'None'”可能是什么问题？

非常感谢大家

forms.py：

class CashFlowForm(forms.ModelForm):
 class Meta:
    model = models.CashFlow
    fields = ['type', 'amount', 'description','date']
    widgets = {'date': DatePicker()}

views.py：

def create_cashflow(request, fundslug):

 funddetail = Fund.objects.get(slug=fundslug)

 if request.method == 'POST':
    cf = CashFlowForm(request.POST)
    cf.feeder = funddetail.feeder
    if cf.is_valid():
        instance_cf = cf.save()
        messages.success(request, 'Cash Flow successfully added!')
        return redirect('funds:create_cashflow', fundslug = fundslug) 
 else:
    cf = CashFlowForm()

 return render(request, 'funds/create_cashflow.html', {'cf': cf})

Answer 1

我认为 funddetail.feeder 返回无，或者您可以尝试

cf.cleaned_data['feeder'] = funddetail.feeder

Answer 2

除非有外键，否则模型并不重要。对于类型错误，主要与模型字段从表单获取的值有关。

要在提交表单后分配值，请执行以下操作

if request.method == 'POST':
    cf = CashFlowForm(request.POST)
    cf.save(commit=False)
    cf.feeder = funddetail.feeder
    cf.save()

Django-ModelForm-初始值

2 个答案: