Django mptt教程错误

Question

我在跟踪本教程，我被困住了。

我已经定义了本教程中提到的所有内容，但是我得到了以下错误：

NameError at /genres/
global name 'Genre' is not defined
Request Method: GET
Request URL:    http://127.0.0.1:8000/genres/
Django Version: 1.6.2
Exception Type: NameError
Exception Value:    
global name 'Genre' is not defined
Exception Location: /home/abhishek/projects/mptt/mpttsample/mpttmodel/views.py in show_genres, line 4
Python Executable:  /home/abhishek/projects/mptt/bin/python
Python Version: 2.7.3
Python Path:    
['/home/abhishek/projects/mptt/mpttsample',
 '/home/abhishek/projects/mptt/local/lib/python2.7/site-packages/django_mptt-0.6.0-py2.7.egg',
 '/home/abhishek/projects/mptt/lib/python2.7/site-packages/django_mptt-0.6.0-py2.7.egg',
 '/home/abhishek/projects/mptt/lib/python2.7',
 '/home/abhishek/projects/mptt/lib/python2.7/plat-linux2',
 '/home/abhishek/projects/mptt/lib/python2.7/lib-tk',
 '/home/abhishek/projects/mptt/lib/python2.7/lib-old',
 '/home/abhishek/projects/mptt/lib/python2.7/lib-dynload',
 '/usr/lib/python2.7',
 '/usr/lib/python2.7/plat-linux2',
 '/usr/lib/python2.7/lib-tk',
 '/home/abhishek/projects/mptt/local/lib/python2.7/site-packages',
 '/home/abhishek/projects/mptt/lib/python2.7/site-packages']
Server time:    Tue, 18 Mar 2014 11:07:13 -0500

请告诉我我的错误。谢谢

Answer 1

很难说，因为您没有发布任何示例代码，但在当前命名空间中未定义此变量时，python将给出global name 'variable' is not defined语句。

如果您直接从教程中工作，并且错误是在views.py中抛出的，那么我的猜测是您忘记了在这个文件中导入模型。

尝试：

from mttp.models import Genre

mttp是你的应用程序的名字。我只是从教程网站抓取，但你可能会或不可能有不同的设置。