views.py

Question

假设我有一个具有两个模型的应用程序，模型汽车和轮胎模型，每个模型都有一个表单，汽车通过ForeignKey与Tire关联。

#models.py
class Car(models.Model):
    car_name = models.CharField(max_length=500, verbose_name="Car")
    car_make = models.CharField(max_length=500, verbose_name="Make")

class Tire(models.Model):
    car = models.ForeignKey(Car, on_delete=models.CASCADE, default="", related_name="Car")
    tire_name = models.CharField(max_length=500, verbose_name="Car")
    tire_make = models.CharField(max_length=500, verbose_name="Make")

当用户使用下面的示例表单创建Car时，它们将被重定向到Car的DetailView。

#forms.py
class CarCreateForm(forms.ModelForm):
    class Meta:
        model = Car
        fields = (
        'car_name',
        'car_make'
        )

在DetailView页面上，有一个“添加轮胎”按钮，通过单击它可以将用户转移到TireCreateView（具有表单）。

#forms.py
class TireCreateForm(forms.ModelForm):
    class Meta:
        model = Tire
        fields = (
        'car',
        'tire_name',
        'tire_make'
        )

但是问题是，在此视图中，用户必须从许多汽车（已经在数据库中）中进行选择，然后输入Tyre详细信息。我要实现以下过程：

用户访问CarDetailView
用户单击“添加轮胎”按钮
表单仅显示tire_name和tire_make字段
用户填写这些字段并提交表单
将轮胎详细信息从步骤1添加到汽车中

如何在TireCreateForm和TireCreateView中定义汽车零件，以自动获取用户想要将Tire添加到的汽车ID？

编辑：

#car_detail.html
<div class="row">
<div class="col-sm-12">
<div class="btn-group pull-right m-t-15">

<div class="button-list">

<a href="{% url 'ap:tire-create' car.id%}" class="btn btn-default waves-effect waves-light">
<span class="btn-label">
<i class="ti-flag"></i>
</span> Add Tire</a>    

</div>    
</div>


#views.py
class CarDetailView(DetailView):
    template_name = 'car_detail.html'
    queryset = Car.objects.all()

    def get_object(self):
        id_ = self.kwargs.get("id")
        return get_object_or_404(Car, id=id_)

class TireCreateView(CreateView):
    template_name = 'tire_create.html'
    form_class = TireForm
    queryset = Tire.objects.all()

    def get_initial(self):
            return dict(car=self.kwargs.get("id"))

    def form_valid(self, form):

        #Meta information
        form.instance.created_by = self.request.user
        form.instance.created_date = timezone.now()

        return super().form_valid()

#urls.py    
urlpatterns = [
    path('create/<int:id>', TireCreateView.as_view(), name="tire-create"),
]

Answer 1

点击添加轮胎按钮时，通过网址发送汽车的pk ID以创建视图

car_detail.html

<a href="{% url 'app_name:add_tires' car.pk %}" class="btn btn-info" role="button">Add Tire</a>

urls.py

urlpatterns = [
    path('add_tires/<pk:uuid>', views.TireCreateView.as_view()),
]

views.py 覆盖get_initial方法以将初始值发送到您的表单

class CreateTireView(CreateView)
  # your CreateTireView
  #####
  def get_initial(self):
    """Return the initial data to use for forms on this view."""
    return dict(car=self.kwargs.get("pk")

Answer 2

我想我是通过修改views.py来解决的：

views.py

class TireCreateView(CreateView):
    template_name = 'tire_create.html'
    form_class = TireForm
    queryset = Tire.objects.all()

    def form_valid(self, form):
        car = get_object_or_404(Car, id=self.kwargs.get("id"))  
        form.instance.car = car

        #Meta information
        form.instance.created_by = self.request.user
        form.instance.created_date = timezone.now()

        return super().form_valid()

如何从DetailView中获取模型X的ID并将其添加到模型Y的CreateView中？

2 个答案:

views.py