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Python3.x 没有可重定向到的 URL.提供一个 url 或在模型上定义一个 get_absolute_url 方法

我正在使用CreateView构建表单.从DetailView调用CreateView.提交表单后，我希望将经过验证、提交的数据返回到初始的DetailView.

DetailView会调用CreateView.在提交之前，表格将按预期工作.然后，我得到这个错误:No URL to redirect to. Either provide a url or define a get_absolute_url method on the Model.

我试着用this solution，但它也出现了同样的错误.我try 通过调用CreateView的URL传递数据并重定向.我还是会犯同样的错误.

有人能告诉我如何将CreateView重定向回原始的DetailView(并传回已验证的数据)吗？

模型.py

class Lawyer(models.Model):
    name = models.CharField(max_length=100, default='')
    practice_area = models.CharField(max_length=100, default='')
    address = models.CharField(max_length=255, default='')
    city = models.CharField(max_length=50, default='')
    state = models.CharField(max_length=2, default='')
    zipcode = models.CharField(max_length=10, default='')
    telephone = models.CharField(max_length=15, default='')
    years_practice = models.IntegerField(default=10)
    objects = models.Manager()
    lawyer_slug = models.SlugField(default='')

    def get_absolute_url(self):
        return reverse('lawyer_detail', kwargs={'lawyer_slug': self.lawyer_slug})

    def __str__(self):
        return self.name

class Review(models.Model):
    RATING_CHOICES = (
        (0, '0'),
        (1, '1'),
        (2, '2'),
        (3, '3'),
        (4, '4'),
        (5, '5'),
    )
    lawyer = models.ForeignKey(Lawyer, null=True)
    review_created = models.DateTimeField('Date of Review', auto_now_add=True)
    reviewer_name = models.CharField(max_length=55, default='')
    reviewer_city = models.CharField(max_length=55, default='')
    reviewer_state = models.CharField(max_length=2, default='')
    email = models.EmailField(default='')
    rating = models.IntegerField(default=1, choices=RATING_CHOICES)
    review_comment = models.TextField(default='')
    review_slug = models.SlugField(default='')

    def get_absolute_url(self):
        return reverse('lawyer_createreview', kwargs={'review_slug': self.review_slug})

    def __str__(self):
        return self.review_slug

意见.py

class LawyerDetail(DetailView):
    model = Lawyer

    template = 'lawyer_detail.html'

    context_object_name = 'lawyer'

    def get_object(self):
        lawyer_slug = Lawyer.objects.get(
            lawyer_slug=self.kwargs.get('lawyer_slug')
        )
        return lawyer_slug

    def get_context_data(self, **kwargs):
        context = super(LawyerDetail, self).get_context_data(**kwargs)
        context['lawyer_reviews'] = self.object.review_set.all()
        return context

class LawyerReviewCreate(CreateView):
    model = Review
    form_class = ReviewForm

    def get_form_kwargs(self, **kwargs):
        kwargs = super(LawyerReviewCreate, self).get_form_kwargs()
        redirect = self.request.GET.get('next')
        if redirect:
            if 'initial' in kwargs.keys():
                kwargs['initial'].update({'next': redirect})
            else:
                kwargs['initial'] = {'next': redirect}
        return kwargs

    def form_invalid(self, form):
        import pdb;pdb.set_trace()  # debug example

        return super(LawyerReviewCreate, self).form_invalid(form)

    def form_valid(self, form):
        redirect = form.cleaned_data.get('next')
        if redirect:
            self.success_url = redirect
        return super(LawyerReviewCreate, self).form_valid(form)

网址.py

url(r'^lawyers/(?P<lawyer_slug>[\w-]+)/$', LawyerDetail.as_view(), name='lawyer_detail'),
url(r'^lawyers/(?P<lawyer_slug>[\w-]+)/createreview/$', LawyerReviewCreate.as_view(), name='lawyer_createreview'),

样板html(调用CreateView和显示返回数据的部件)

<div class="review_buttom_wrapper">
    <a href="{% url 'lawyer_createreview' lawyer.lawyer_slug %}?next={% url 'lawyer_detail' lawyer.lawyer_slug %}">
        <button class="review_button">
            <strong>Review</strong> {{ lawyer.name }}
        </button>
    </a>
</div>

{% for review in lawyer_reviews %}
<div style="padding-left: 15px; padding-right: 15px; overflow:auto;">
    <div class="review-masthead">
        <div class="medium-3 columns">
            <p class="posttime">{{ review.review_created|timesince }} ago </p>
            <p class="review-title">{{ review.user_name }} <span class="location">{{ review.lawyer.city }}, {{ review.lawyer.state }}</span></p> 
        </div>
        <div class="medium-7 columns">
            <p>{{ review.review_comment }}</p>
        </div>
        <div class="medium-2 columns">
            <div class="user_rating">
                Rating
            </div>
            <div class="rating_number">
                {{ review.rating }}
            </div>

        </div>
    </div>
{% endfor %}

形式.py

RATING_CHOICES = (
        (1, '1'),
        (2, '2'),
        (3, '3'),
        (4, '4'),
        (5, '5'),
    )

class ReviewForm(forms.ModelForm):
    reviewer_name = forms.CharField(widget = forms.TextInput(attrs={'class': 'review_input_box', 'placeholder': 'Your name'}))
    reviewer_city = forms.CharField(widget = forms.TextInput(attrs={'class': 'review_input_box', 'placeholder': 'Your city'}))
    reviewer_state = forms.CharField(widget = forms.TextInput(attrs={'class': 'review_input_box', 'placeholder': 'Your state'}))
    rating = forms.ChoiceField(choices = RATING_CHOICES, label="", initial='', widget = forms.Select(attrs={'class': 'review_selector'}), required=True)
    email = forms.EmailField(widget = forms.TextInput(attrs={'class': 'review_input_box', 'placeholder': 'your-email@email.com'}))
    review_comment = forms.CharField(widget = forms.Textarea(attrs={'class': 'review_input_box', 'placeholder': 'What would you like to say?'}))

    class Meta:
        model = Review
        fields = ['reviewer_name', 'reviewer_city', 'reviewer_state', 'rating', 'email', 'review_comment']


Traceback:

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/edit.py" in get_success_url
  190.                 url = self.object.get_absolute_url()

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/ralph/fathers/模型.py" in get_absolute_url
  142.      return reverse('lawyer_createreview', kwargs={'lawyer_slug': self.lawyer_slug})

During handling of the above exception ('Review' object has no attribute 'lawyer_slug'), another exception occurred:

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/edit.py" in post
  256.         return super(BaseCreateView, self).post(request, *args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/edit.py" in post
  222.             return self.form_valid(form)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/ralph/fathers/意见.py" in form_valid
  165.      return super(LawyerReviewCreate, self).form_valid(form)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/edit.py" in form_valid
  202.         return super(ModelFormMixin, self).form_valid(form)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/edit.py" in form_valid
  108.         return HttpResponseRedirect(self.get_success_url())

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/generic/edit.py" in get_success_url
  193.                     "No URL to redirect to.  Either provide a url or define"

Exception Type: ImproperlyConfigured at /xxxxxxx/xxxxxxx/xxxxxxx-xxxxxx/createreview/
Exception Value: No URL to redirect to.  Either provide a url or define a get_absolute_url method on the Model.

更改查看模型上的get_absolute_url后的回溯

Traceback:

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  149.                     response = self.process_exception_by_middleware(e, request)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/core/handlers/base.py" in get_response
  147.                     response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/contrib/admin/sites.py" in wrapper
  265.                 return self.admin_view(view, cacheable)(*args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/utils/decorators.py" in _wrapped_view
  149.                     response = view_func(request, *args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/views/decorators/cache.py" in _wrapped_view_func
  57.         response = view_func(request, *args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/contrib/admin/sites.py" in inner
  244.             return view(request, *args, **kwargs)

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/contrib/contenttypes/意见.py" in shortcut
  31.     absurl = get_absolute_url()

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/xxxxx/xxxxxxx/模型.py" in get_absolute_url
  142.      return reverse('lawyer_createreview', kwargs={'review_slug': self.review_slug})

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/core/urlresolvers.py" in reverse
  600.     return force_text(iri_to_uri(resolver._reverse_with_prefix(view, prefix, *args, **kwargs)))

File "/xxxx/xxxxxxxxxx/xxxx/xxxxxxxxxxxx/lib/python3.5/site-packages/django/core/urlresolvers.py" in _reverse_with_prefix
  508.                              (lookup_view_s, args, kwargs, len(patterns), patterns))

Exception Type: NoReverseMatch at /admin/r/14/1/
Exception Value: Reverse for 'lawyer_createreview' with arguments '()' and keyword arguments '{'review_slug': 'michael-ferrin'}' not found. 1 pattern(s) tried: ['fathers/lawyers/(?P<lawyer_slug>[\\w-]+)/createreview/$']

推荐答案

最好的方法是在创建视图上添加一个方法get_success_url，并使用该方法重定向回细节视图.在"创建"视图中，保存对象后，您将看到该对象，如下所示

class LawyerReviewCreate(CreateView):
    def get_success_url(self):
        return reverse('lawyer_detail', kwargs={'lawyer_slug': self.object.lawyer_slug})

如果表单有效，这将自动将用户发送回详细信息视图.

此外，请确保您的kwargs使用了正确的键，在某些情况下，您似乎在使用review_slug，在其他情况下，您在使用律师_slug

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