Django的RedirectView的返回无

Question

我想用在Django重定向的观点，但我不断收到此错误：

The view gp_accountant.gp_taxes.views.TaxRateDeleteView didn't return an HttpResponse object. It returned None instead.

我基于this question我的代码。

任何人都知道问题出在哪里？

这是我的网址文件（路径：​​）：

app_name = 'gp_taxes' 
urlpatterns = [ 
    url(r'^$', TaxesListView.as_view(), name='list'), 
    url(
     r'^delete_rate/(?P<pk>\d+)/$', 
     TaxRateDeleteView.as_view(pattern_name='accountant:gp_taxes:update'), 
     name='delete_rate' 
    ), 
] 

的TaxRateDeleteView：

class TaxRateDeleteView(RedirectView): 
    def dispatch(self, request, *args, **kwargs): 
     TaxRate.objects.get(id=int(kwargs['pk'])).delete() 

Answer 1

@FazilZaid几乎正确，你需要返回他答案的最后一行。问题是，你的dispatch不返回任何东西一般它应该返回HttpResponseRedirect所以，使其工作与super叫你需要@Alasdair

提供 success_url到您的视图

class TaxRateDeleteView(RedirectView): 
    success_url = # <- your url here 

    def dispatch(self, request, *args, **kwargs): 
     TaxRate.objects.get(id=int(kwargs['pk'])).delete() 
     return super(TaxRateDeleteView,self).dispatch(request, *args, **kwargs) 

而且按照此评论

Using a redirect view for deleting objects is a bad idea. You should not be deleting objects with get requests like this.

您应该使用https://docs.djangoproject.com/en/1.11/ref/class-based-views/generic-editing/#django.views.generic.edit.DeleteView这是删除对象正确的方式，而不是RedirectView的

Answer 2

编辑您的看法，对调度方法

class TaxRateDeleteView(RedirectView): 
    def dispatch(self, request, *args, **kwargs): 
     TaxRate.objects.get(id=int(kwargs['pk'])).delete() 
     return super(TaxRateDeleteView,self).dispatch(request, *args, **kwargs) 

调用超你视图。

Answer 3

你不应该重写调度实现方法具d。

尝试这样代替：

class TaxRateDeleteView(RedirectView): 
    def get_redirect_url(self, *args, **kwargs): 
     TaxRate.objects.get(id=int(kwargs['pk'])).delete() 
     return reverse('delete_rate')