python之基于 django 类的 View get_context_data 得到了一个意外的关键字参数

我正在尝试从基于 Django 类的 View 中创建一个 CRUD 应用程序。 这是我更新/创建笔记的观点。

class CreateNoteView(CreateView): 
 
    model = Note 
    template_name = 'edit_note.html' 
 
    def get_success_url(self): 
        return reverse('notes-list') 
 
    def get_context_data(self): 
 
        context = super(CreateNoteView, self).get_context_data(**kwargs) 
        context['action'] = reverse('notes-create') 
        return context 
 
 
class UpdateNoteView(UpdateView): 
 
    model = Note 
    template_name = 'edit_note.html' 
 
    def get_success_url(self): 
        return reverse('notes-list') 
 
    def get_context_data(self, **kwargs): 
 
        context = super(UpdateNoteView, self).get_context_data(**kwargs) 
        context['action'] = reverse('notes-edit', 
                                    kwargs={'pk':self.get_object().id}) 
        return context 

这是我的模型文件:

# Create your models here. 
class Note(models.Model): 
 
    title = models.CharField(max_length=200) 
    description = models.TextField() 
    pub_date = models.DateField(auto_now_add=True) 

我的 urls 文件如下所示:

urlpatterns = patterns('', 
       url(r'^create/$',CreateNoteView.as_view(), name='notes-create',), 
       url(r'^$', ListNoteView.as_view(), name='notes-list',),     
       url(r'^edit/(?P<pk>\d+)/$', UpdateNoteView.as_view(), name='notes-edit',),                        
) 

模板如下:

{% if note.id %} 
<h1> Edit Note </h1> 
{% else %} 
<h1>Add Notes</h1> 
{% endif %} 
 
<form action="{{ action }}" method="POST"> 
  {% csrf_token %} 
  <ul> 
    {{ form.as_p }} 
  </ul> 
  <input type="submit" value="Save" /> 
</form> 
<a href="{% url "notes-list" %}">back to list</a> 

我收到一个错误，

异常类型:TypeError at/create/

异常值:get_context_data() 得到了一个意外的关键字参数“form”

这是回溯:

File "/home/.virtualenvs/djtalk/local/lib/python2.7/site-packages/django/core/handlers/base.py" in get_response 
  115.                         response = callback(request, *callback_args, **callback_kwargs) 
File "/home/.virtualenvs/djtalk/local/lib/python2.7/site-packages/django/views/generic/base.py" in view 
  68.             return self.dispatch(request, *args, **kwargs) 
File "/home/.virtualenvs/djtalk/local/lib/python2.7/site-packages/django/views/generic/base.py" in dispatch 
  86.         return handler(request, *args, **kwargs) 
File "/home/.virtualenvs/djtalk/local/lib/python2.7/site-packages/django/views/generic/edit.py" in get 
  195.         return super(BaseCreateView, self).get(request, *args, **kwargs) 
File "/home/.virtualenvs/djtalk/local/lib/python2.7/site-packages/django/views/generic/edit.py" in get 
  155.         return self.render_to_response(self.get_context_data(form=form)) 
 
Exception Type: TypeError at /create/ 
Exception Value: get_context_data() got an unexpected keyword argument 'form' 

请您参考如下方法:

更新

def get_context_data(self): 

在 CreateNoteView 中:

def get_context_data(self, **kwargs): 

当您重写方法时(在本例中为:get_context_data)，您应该尽可能确保保持相同的签名:在本例中，get_context_data 是预计会收到 self, **kwargs。

关于您的评论:

class NoteMixin(object): 
 
    model = Note 
    template_name = 'edit_note.html' 
 
    def get_success_url(self): 
        return reverse('notes-list') 
 
     def get_context_data(self, **kwargs): 
        context = super(NoteMixin, self).get_context_data(**kwargs) 
        context['action'] = self.get_action() 
        return context 
 
class UpdateNoteView(NoteMixin, UpdateView): 
    def get_action(self): 
        return reverse('notes-edit', kwargs={'pk':self.get_object().id}) 
 
class CreateNoteView(NoteMixin, CreateView): 
    def get_action(self): 
        return reverse('notes-create')