django RedirectView 中的 Success_url答案

【问题标题】：Success_url in django RedirectViewdjango RedirectView 中的 Success_url
【发布时间】：2023-03-20 01:05:01
【问题描述】：

有人知道，我可以将 SuccessMessageMixin 与 RedirectView 一起使用吗？因为当我在视图中使用它时：

class CarRentView(SuccessMessageMixin,RedirectView):
    success_message = "Well done!"
    permanent = False
    query_string = True
    model = Car


    def get_redirect_url(self, *args, **kwargs):
        car = get_object_or_404(Car, pk=kwargs['pk'])
        car.rent=True
        car.save()
        return reverse('cars')

什么也没发生。

我还有另一个问题 - 有没有办法“阻止”汽车，它是为下一个用户租用的，并让想要同一辆车的人排队？

【问题讨论】：

标签： django queue django-views mixins

【解决方案1】：

SuccessMessageMixin 用于“FormView”类，RedirectView 没有表单功能

第二个问题更复杂我认为您需要做一些类似的事情（未经测试）

models.py

class Car(models.Model):
     ...

class CarQueue(models.Model):
     car = models.ForeignKey(Car)
     user = models.ForeignKey(User)
     updated_at = models.DateTimeField(auto_now=True)
     state = models.PositiveSmallIntegerField(default=1)
     # 1 - user rent, 2 - user wait, 0 - archive
     ...
     class Meta:
            unique_together = [['car', 'user']]
            ordering = ['state', 'updated_at']

views.py

 class CarRentView(UpdateView):
       model = CarQueue
       fields = ['car'] 

       def get_object(self):
          return self.object

       def get_success_url(self):
           # return url according object.state

       def form_valid(self, form):
            # registered users can rent
            form.instance.user = self.request.user
            qset = self.model.objects.filter(car=self.car, state__gt=0)
            if self.object:
                qset = qset.exclude(pk=self.object.pk)
            form.instance.state = 1 if qset.exists() else 2

            return super(..).form_valid(form)

       @method_decorator(login_required)      
       def dispatch(self, request, *args, **kwargs)
            self.car = get_object_or_404(self.model, pk=kwargs['car_pk']) 
            try:
                self.object = self.model.objects.get(car=car, user=request.user)
            except ObjectDoesNotExist:
                self.object = None
            return super(..).dispatch(..)

car_rent_view.html

<form method="post">
     {% csrf_token %} 
     {{ form }}
     <input type="submit">
</form>

urls.py

 url(r'^rent/(?P<car_pk>[^\/]+)/', views.CartRentView.as_view(), name='CartRentView'),

【讨论】：