类型错误：在/ '模块' 对象不是可调用

Question

models.py：

import datetime 
from django.db import models 
from pygments.lexers import get_all_lexers 

LEXERS = [item for item in get_all_lexers() if item[1]] 

class Classname(models.Model): 
    class_name = models.CharField(max_length=8) 
    def __str__(self): 
     return self.class_name 

class Sectionname(models.Model): 
    class_name = models.ForeignKey(Classname) 
    section_name = models.CharField(max_length=1, default='A') 
    def __str__(self): 
     return self.section_name 

class Teachername(models.Model): 
    classname = models.ForeignKey(Classname, verbose_name='class Name') 
    secname = models.ForeignKey(Sectionname, verbose_name='sectionname') 
    teachname = models.CharField(max_length=50, verbose_name='teacher Name') 
    def __str__(self): 
     return self.teachname 

class Attendancename(models.Model): 
    teacher_name = models.ForeignKey(Teachername) 
    date = models.DateField('Date') 
    intime = models.TimeField('IN-TIME') 
    outtime = models.TimeField('OUT-TIME') 

    def hours_conversion(self): 
     tdelta = (datetime.datetime.combine(datetime.date.today(),self.outtime) - datetime.datetime.combine(datetime.date.today(),self.intime)) 
    hours, minutes = tdelta.seconds//3600, (tdelta.seconds//60)%60 
     return '{0}hrs {1}mins'.format(hours, minutes) 

    def __str__(self): 
     return "%s" %self.teacher_name 

views.py：

from django.contrib.auth.models import User 
from .models import Classname, Sectionname, Teachername, Attendancename 
from rest_framework import generics, reverse 
from rest_framework.response import Response 
from rest_framework.decorators import api_view 
from .serializers import ClassSerializer, SectionSerializer, TeacherSerializer, AttendanceSerializer, UserSerializer 
from rest_framework.permissions import IsAuthenticatedOrReadOnly 



#serializing code starts from here! 
@api_view(('GET',)) """when I add this view it raises above exception""" 
def api_root(request, format=None): 
    return Response({ 
    'users': reverse('user-list', request=request, format=format), 
    'class':reverse('class', request=request, format=format), 
    'section':reverse('student:section', request=request, format=format), 
    'teacher':reverse('student:teacher', request=request, format=format), 
    'attendance':reverse('student:attend', request=request, format=format) 
    }) 

class UserList(generics.ListAPIView): 
    queryset = User.objects.all() 
    serializer_class = UserSerializer 


class UserDetail(generics.RetrieveAPIView): 
    queryset = User.objects.all() 
    serializer_class = UserSerializer 

class ClassList(generics.ListCreateAPIView): 
    queryset = Classname.objects.all() 
    serializer_class = ClassSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class ClassDetail(generics.RetrieveUpdateDestroyAPIView): 
    queryset = Classname.objects.all() 
    serializer_class = ClassSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class SectionList(generics.ListCreateAPIView): 
    queryset = Sectionname.objects.all() 
    serializer_class = SectionSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class SectionDetail(generics.RetrieveUpdateDestroyAPIView): 
    queryset = Sectionname.objects.all() 
    serializer_class = SectionSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class TeacherList(generics.ListCreateAPIView): 
    queryset = Teachername.objects.all() 
    serializer_class = TeacherSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class TeacherDetail(generics.RetrieveUpdateDestroyAPIView): 
    queryset = Teachername.objects.all() 
    serializer_class = TeacherSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class AttendanceList(generics.ListCreateAPIView): 
    queryset = Attendancename.objects.all() 
    serializer_class = AttendanceSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

class AttendanceDetail(generics.RetrieveUpdateDestroyAPIView): 
    queryset = Attendancename.objects.all() 
    serializer_class = AttendanceSerializer 
    permission_classes = (IsAuthenticatedOrReadOnly,) 

urls.py：

from django.conf.urls import url, patterns 
from . import views 

urlpatterns = [ 
    #DRF urls start from here... 
    url(r'^', views.api_root), 
    url(r'^users/$', views.UserList.as_view()), 
    url(r'^users/(?P<pk>[0-9]+)/$', views.UserDetail.as_view()), 
    url(r'^class/$', views.ClassList.as_view(), name='class'), 
    url(r'^class/(?P<pk>[0-9]+)/$', views.ClassDetail.as_view(), name='classdet'), 
    url(r'^section/$', views.SectionList.as_view(), name='section'), 
    url(r'^section/(?P<pk>[0-9]+)/$', views.SectionDetail.as_view(), name='sectiondet'), 
    url(r'^teach/$', views.TeacherList.as_view(), name='teacher'), 
    url(r'^teach/(?P<pk>[0-9]+)/$', views.TeacherDetail.as_view(), name='teacherdet'), 
    url(r'^attend/$', views.AttendanceList.as_view(), name='attend'), 
    url(r'^attend/(?P<pk>[0-9]+)/$', views.AttendanceDetail.as_view(), name='attendet'), 
] 

这里是我的完全回溯：

Environment: 


Request Method: GET 
Request URL: http://127.0.0.1:8000/stu/class/ 

Django Version: 1.8.3 
Python Version: 3.4.3 
Installed Applications: 
('django.contrib.admin', 
'django.contrib.auth', 
'django.contrib.contenttypes', 
'django.contrib.sessions', 
'django.contrib.messages', 
'django.contrib.staticfiles', 
'rest_framework', 
'student') 
Installed Middleware: 
('django.contrib.sessions.middleware.SessionMiddleware', 
'django.middleware.common.CommonMiddleware', 
'django.middleware.csrf.CsrfViewMiddleware', 
'django.contrib.auth.middleware.AuthenticationMiddleware', 
'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 
'django.contrib.messages.middleware.MessageMiddleware', 
'django.middleware.clickjacking.XFrameOptionsMiddleware', 
'django.middleware.security.SecurityMiddleware') 


Traceback: 
File "C:\Users\User\demo\venv\lib\site- packages\django\core\handlers\base.py" in get_response 
    132.      response = wrapped_callback(request, *callback_args, **callback_kwargs) 
File "C:\Users\User\demo\venv\lib\site-packages\django\views\decorators\csrf.py" in wrapped_view 
    58.   return view_func(*args, **kwargs) 
File "C:\Users\User\demo\venv\lib\site-packages\django\views\generic\base.py" in view 
    71.    return self.dispatch(request, *args, **kwargs) 
File "C:\Users\User\demo\venv\lib\site-packages\rest_framework\views.py" in dispatch 
    456.    response = self.handle_exception(exc) 
File "C:\Users\User\demo\venv\lib\site-packages\rest_framework\views.py" in dispatch 
    453.    response = handler(request, *args, **kwargs) 
File "C:\Users\User\demo\venv\lib\site-packages\rest_framework\decorators.py" in handler 
    50.    return func(*args, **kwargs) 
File "C:\Users\User\demo\p\oursite\student\views.py" in api_root 
    21.  'users': reverse('user-list', request=request, format=format), 

Exception Type: TypeError at /stu/class/ 
Exception Value: 'module' object is not callable 

我正在关注DRF的教程，我在自己的演示应用程序上尝试它，除非尝试在我的views.py文件中添加'root_api'视图，否则它会立即生效，它会立即引发以上异常。

我想为本教程中的所有视图创建一个入口点。

我不知道它为什么会显示这种行为，因为我在我的urls中也使用了命名空间。我在某处做错了吗？

请！帮我修复它....

谢谢！在推进.....

Answer 1

你错过了进口的东西。这不是

from rest_framework import reverse 

但

from rest_framework.reverse import reverse