Question

我想在创建汽车模型实例时创建4个轮胎实例和1个引擎实例这是我的模型代码

class car_form(forms.ModelForm):

    class Meta:
        model = Car
        fields = (
            'comapany',
            'car_model',
            'year'
            )

    def save(self, commit=True):
        obj=car_form.save()
        obj.company = self.cleaned_data['comapany']
        obj.car_model = self.cleaned_data['car_model']
        obj.year = self.cleaned_data['year']

        if commit:
            obj.save()

    return obj

和汽车的表格

def car_create(request):
    if request.method =='POST':
        form = car_form(request.POST)
        if form.is_valid():
            form.save()
            return redirect("/")
        else :
            return render(request, 'agency/car_form.html', 
                          {'form': form})
    else:
        form = car_form()

        args = {'form': form}
        return render(request, 'agency/car_form.html', args)

这是我的观点

slideUp

我应该在代码中更改什么我只是一个自学初学者，请原谅我的问题提前谢谢

Answer 1

您可以根据父实例创建实例，如：

Views.py

...
    new_car = form.save()
    engine = Engine.objects.create(car=new_car)
    for i in range(4):
        tyre = Tyre.objects.create(car=new_car)
...

根据django中另一个模型的实例自动创建模型实例

1 个答案:

Views.py