Question

为什么会返回NoReverseMatch错误？

视图：

def browse(request):
    thing_list = Thing.objects.all()
    if request.method == 'POST':
        form = BrowseForm(request.POST)
        if form.is_valid():
            make = Make.objects.all()
            return HttpResponseRedirect(reverse('browse_makes', args=[make]))
    else:
        form = BrowseForm()
    return render(request, 'browse.html', {'form':form, 'thing_list':thing_list})

def makes(request, make):
    ad_list = Thing.objects.filter(make=make)
    return render(request, 'browse-makes.html', {'thing_list':thing_list})

URL：

url(r'^browse/$', 'axlepost.views.browse.browse', name='browse'),
url(r'^browse/(?P<make>[\w-]+)/$', 'axlepost.views.browse.makes', name='browse_makes'),

形式：

class BrowseForm(forms.Form):
     make = forms.ModelChoiceField(queryset=Make.objects.all())

模型：

class Make(models.Model):
    make = models.CharField(max_length=20)

class Thing(models.Model):
    make = models.ForeignKey(Make)

返回Reverse for 'browse_makes' with arguments '([<Make: Samsung>],)' and keyword arguments '{}' not found. 感谢您关于如何解决此错误的想法！

Answer 1

您正在递送reverse()一个QuerySet而不是一个值。它也是一个.all()查询，所以它可能有多个对象，而且它与表单结果无关。

make = Make.objects.all() # QuerySet = ([<Make: Samsung>], [<Make: Sony>], [<Make: Apple>], etc)
return HttpResponseRedirect(reverse('browse_makes', args=[make])) # Expects 1 value

假设您想要重定向到表单中选择的Make，那么您需要以下内容：

if form.is_valid():
    # Get the valid form data
    cd = form.cleaned_data

    # Get the selected Make
    make = cd.get('make')

    # Redirect - note 'make.make'.  You want to pass the value not the object
    return HttpResponseRedirect(reverse('browse_makes', kwargs={'make': make.make}))

Answer 2

我认为有几个问题

您的网址与相应的视图不对应

更改此行

url(r'^browse/(?P<make>[\w-]+)/$', 'axlepost.views.browse.makes', name='browse_makes'),

到

url(r'^browse/(?P<make>[\w-]+)/$', 'axlepost.views.browse', name='browse_makes'),

更改视图定义以采用make参数

def浏览（请求，制作）： ... ＃将你的本地变量'make'改为其他东西

NoReverseMatch参数django

2 个答案: