Python TypeError:无法在django中创建一致的方法解析
我正在通过“django 3 by example”一书学习django,现在我正在尝试构建一个电子学习平台。但是,我的views.py文件中出现了一个奇怪的错误 这是我的视图文件:Python TypeError:无法在django中创建一致的方法解析,python,django,Python,Django,我正在通过“django 3 by example”一书学习django,现在我正在尝试构建一个电子学习平台。但是,我的views.py文件中出现了一个奇怪的错误 这是我的视图文件: from django.views.generic.list import ListView from django.urls import reverse_lazy from django.views.generic.edit import CreateView, UpdateView, DeleteView f
from django.views.generic.list import ListView
from django.urls import reverse_lazy
from django.views.generic.edit import CreateView, UpdateView, DeleteView
from django.contrib.auth.mixins import LoginRequiredMixin, PermissionRequiredMixin
from .models import Course
class ManageCourseListView(ListView):
model = Course
template_name = 'educa/manage/educa/list.html'
permission_required = 'educa.view_course'
def get_queryset(self):
qs = super().get_queryset()
return qs.filter(owner=self.request.user)
class OwnerMixin(object):
def get_queryset(self):
qs = super().get_queryset()
return qs.filter(owner=self.request.owner)
class OwnerEditMixin(object):
def form_valid(self, form):
form.instance.onwer = self.request.user
return super().form_valid(form)
class OwnerCourseMixin(object, LoginRequiredMixin, PermissionRequiredMixin):
model = Course
fields = ['subject', 'title', 'slug', 'overview']
success_url = reverse_lazy('manage_course_list')
class OwnerCourseEditMixin(OwnerCourseMixin, OwnerEditMixin):
template_name = 'educa/manage/course/list.html'
class CourseCreateView(OwnerEditMixin, CreateView):
permission_required = 'educa.add_course'
class CourseUpdateView(OwnerCourseEditMixin, UpdateView):
permission_required = 'educa.change_course'
class CourseDeleteView(OwnerCourseMixin, DeleteView):
template_name = 'educa/manage/course/delete.html'
permission_required = 'educa.delete_course'
错误在第30行。
以下是完整的错误消息:
Exception in thread django-main-thread:
Traceback (most recent call last):
File "C:\Users\Padma Jain\AppData\Local\Programs\Python\Python38\lib\threading.py", line 932, in _bootstrap_inner
self.run()
File "C:\Users\Padma Jain\AppData\Local\Programs\Python\Python38\lib\threading.py", line 870, in run
self._target(*self._args, **self._kwargs)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper
fn(*args, **kwargs)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\core\management\commands\runserver.py", line 118, in inner_run
self.check(display_num_errors=True)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\core\management\base.py", line 392, in check
all_issues = checks.run_checks(
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\core\checks\registry.py", line 70, in run_checks
new_errors = check(app_configs=app_configs, databases=databases)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config
return check_resolver(resolver)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver
return check_method()
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\urls\resolvers.py", line 408, in check
for pattern in self.url_patterns:
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\urls\resolvers.py", line 589, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\utils\functional.py", line 48, in __get__
res = instance.__dict__[self.name] = self.func(instance)
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\urls\resolvers.py", line 582, in urlconf_module
return import_module(self.urlconf_name)
File "C:\Users\Padma Jain\AppData\Local\Programs\Python\Python38\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "C:\Users\Padma Jain\Desktop\django\educa\elearn\elearn\urls.py", line 24, in <module>
path('course/',include('educa.urls')),
File "C:\Users\Padma Jain\Desktop\django\educa\venv\lib\site-packages\django\urls\conf.py", line 34, in include
urlconf_module = import_module(urlconf_module)
File "C:\Users\Padma Jain\AppData\Local\Programs\Python\Python38\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "C:\Users\Padma Jain\Desktop\django\educa\elearn\educa\urls.py", line 2, in <module>
from .views import *
File "C:\Users\Padma Jain\Desktop\django\educa\elearn\educa\views.py", line 30, in <module>
class OwnerCourseMixin(object, LoginRequiredMixin, PermissionRequiredMixin):
TypeError: Cannot create a consistent method resolution
order (MRO) for bases object, LoginRequiredMixin, PermissionRequiredMixin
为此:
class OwnerCourseMixin(OwnerMixin, LoginRequiredMixin, PermissionRequiredMixin):
....
在Python中,每个类都继承自一个名为
对象的内置基本类
您的所有者coursemixin
继承自对象
和其他类。由于另一个类(在本例中为LoginRequiredMixin
和PermissionRequiredMixin
)已经从对象继承,Python现在无法确定首先查找方法的类
您不需要在此处从对象继承
class OwnerCourseMixin(登录要求混合,许可要求混合):
模型=课程
字段=['subject'、'title'、'slug'、'overview']
成功\u url=reverse\u lazy('manage\u course\u list')
那应该行。我想你不需要继承对象,好吧,我试试。但是我需要继承任何东西而不是对象吗?非常感谢。成功了!我已根据答案编辑了我的问题。请稍等。一个小提示:如果你遇到错误,就复制它并用谷歌搜索它。别人肯定已经经历过了,所以这为你节省了很多时间(和压力,如果你和我一样,我会为最小的意外错误感到害怕)。
class OwnerCourseMixin(object, LoginRequiredMixin, PermissionRequiredMixin):
....
class OwnerCourseMixin(OwnerMixin, LoginRequiredMixin, PermissionRequiredMixin):
....