django.core.exceptions.ImproperlyConfigured：CreateView 缺少 QuerySet

Question

我收到错误 CreateView is missing a QuerySet. Define CreateView.model, CreateView.queryset, or override CreateView.get_queryset().

似乎 Django 认为我在使用 CreateView 时没有指定模型。但是，我的观点确实定义了一个模型。

views.py：

from django.views.generic.edit import CreateView
from django.contrib.auth.mixins import PermissionRequiredMixin
from .models import Note

class CreateNoteView(PermissionRequiredMixin, CreateView):
    model = Note
    permission_required = 'file_manager.can_add_note'
    template_name = 'file_manager/note_create.html'
    fields = ['title', 'note', 'tags', 'cases', 'people']

Note模型在models.py中：

class Note(models.Model):
    id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
    created = models.DateTimeField(auto_now_add=True, null=True)
    updated = models.DateTimeField(auto_now=True, null=True)
    title = models.CharField(max_length=60)
    note = models.TextField(null=True, blank=True)
    tags = models.ManyToManyField(FileManagerTags, related_name='tagged_note_set')
    cases = models.ManyToManyField(Case, related_name='related_note_set')
    people = models.ManyToManyField(Person, related_name='notes_rel_to_person')

    def __str__(self):
        return str(self.title)

    def get_absolute_url(self):
        return reverse('file_manager:note_create', kwargs={'pk': self.pk})

我正在使用的引发错误的测试是：

def test_whether_note_create_view_uses_correct_template(self):
    client = Client()
    test_superuser = User.objects.get(username=test_superuser_username)
    client.force_login(test_superuser)
    response = client.get(reverse('file_manager:note_create'), follow=True)
    self.assertTemplateUsed(
        response=response,
        template_name='file_manager/note_index.html'
    )

回溯是：

======================================================================
ERROR: test_whether_note_create_view_uses_correct_template (file_manager.tests.test_views.NoteCreateView)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/mint/Python_Projects/[project_name]/file_manager/tests/test_views.py", line 72, in test_whether_note_create_view_uses_correct_template
    response = client.get(reverse('file_manager:note_create'))
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/test/client.py", line 503, in get
    **extra)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/test/client.py", line 304, in get
    return self.generic('GET', path, secure=secure, **r)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/test/client.py", line 380, in generic
    return self.request(**r)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/test/client.py", line 467, in request
    six.reraise(*exc_info)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/utils/six.py", line 686, in reraise
    raise value
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/core/handlers/base.py", line 149, in get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/core/handlers/base.py", line 147, in get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/base.py", line 68, in view
    return self.dispatch(request, *args, **kwargs)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/base.py", line 88, in dispatch
    return handler(request, *args, **kwargs)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/edit.py", line 251, in get
    return super(BaseCreateView, self).get(request, *args, **kwargs)
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/edit.py", line 212, in get
    return self.render_to_response(self.get_context_data())
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/edit.py", line 121, in get_context_data
    kwargs.setdefault('form', self.get_form())
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/edit.py", line 73, in get_form
    form_class = self.get_form_class()
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/edit.py", line 152, in get_form_class
    model = self.get_queryset().model
  File "/home/mint/Python_Projects/virtualenvs/[project_name]/lib/python3.4/site-packages/django/views/generic/detail.py", line 74, in get_queryset
    'cls': self.__class__.__name__
django.core.exceptions.ImproperlyConfigured: CreateView is missing a QuerySet. Define CreateView.model, CreateView.queryset, or override CreateView.get_queryset().

我已经运行了 makemigrations 和 migrate。我在 Python 3.4 上使用 Django 1.9。我没有做任何不寻常的事情，而且我之前使用过这个确切的模式没有问题。

编辑

我的 urls.py:

from django.conf.urls import url, include

from . import views

urlpatterns = [

    # Note urls
    url(r'^note/create', views.CreateView.as_view(), name='note_create'),
    url(r'^notes/$', views.NoteIndexView.as_view(), name='note_index'),

]

Answer 1

尝试将 URL 模式更改为：

url(r'^note/create', views.CreateNoteView.as_view(), name='note_create')

为我工作。

Answer 2

问题出在urls.py 中，我将其更改为views.py 中的班级名称，这对我有用。

我在views.py 中将CreateView 更改为我的班级名称。

错误的网址：

path('create-task/', views.CreateView.as_view(), name='create-task')

正确的网址：

path('create-task/', views.TaskCreate.as_view(), name='create-task')

TaskCreate 是我在views.py 中的班级名称，我错误地将 CreateView 而不是我的views.py（'TaskCreate'）的班级名称。

祝你好运！

Answer 3

所以我猜你使用了某种自动填充，并且你想在你的 url.py 中传递 viwe 类，但是智能感知将 CreateView 放入其中。所以在你的视图模块中你应该导入 django.views.generic 并导入很多视图类，比如 CreateView 或 ListView，自动填充只是帮你填错了。