Django：导入django-admin.py时出错

Question

目前我已经为Django在/Users/hobbes3/Sites/中创建了两个符号链接。一个ls -l显示以下

lrwxr-xr-x 1 hobbes3 staff 66B Feb 23 04:16 django -> /usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/ 
lrwxr-xr-x 1 hobbes3 staff 85B Feb 23 01:01 django-admin.py -> /usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/bin/django-admin.py 
drwxr-xr-x 15 hobbes3 staff 510B Feb 24 16:04 mysite/ 

其中mysite/是我唯一的Django项目（从官方投票教程建）。

当我键入python django-admin.py，一切工作正常

hobbes3@hobbes3:~/Sites$ python django-admin.py 
Usage: django-admin.py subcommand [options] [args] 

Options: 
    -v VERBOSITY, --verbosity=VERBOSITY 
         Verbosity level; 0=minimal output, 1=normal output, 
         2=all output 
    --settings=SETTINGS The Python path to a settings module, e.g. 
         "myproject.settings.main". If this isn't provided, the 
         DJANGO_SETTINGS_MODULE environment variable will be 
         used. 
    --pythonpath=PYTHONPATH 
         A directory to add to the Python path, e.g. 
         "/home/djangoprojects/myproject". 
    --traceback   Print traceback on exception 
    --version    show program's version number and exit 
    -h, --help   show this help message and exit 

Type 'django-admin.py help <subcommand>' for help on a specific subcommand. 

Available subcommands: 
    cleanup 
    compilemessages 
    createcachetable 
    dbshell 
    diffsettings 
    dumpdata 
    flush 
    inspectdb 
    loaddata 
    makemessages 
    reset 
    runfcgi 
    runserver 
    shell 
    sql 
    sqlall 
    sqlclear 
    sqlcustom 
    sqlflush 
    sqlindexes 
    sqlinitialdata 
    sqlreset 
    sqlsequencereset 
    startapp 
    startproject 
    syncdb 
    test 
    testserver 
    validate 

但是当我尝试使用inspectdb命令，我得到一个导入错误

hobbes3@hobbes3:~/Sites$ python django-admin.py inspectdb doors-eer 
Traceback (most recent call last): 
    File "django-admin.py", line 5, in <module> 
    management.execute_from_command_line() 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/core/management/__init__.py", line 429, in execute_from_command_line 
    utility.execute() 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/core/management/__init__.py", line 379, in execute 
    self.fetch_command(subcommand).run_from_argv(self.argv) 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command 
    klass = load_command_class(app_name, subcommand) 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/core/management/__init__.py", line 67, in load_command_class 
    module = import_module('%s.management.commands.%s' % (app_name, name)) 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module 
    __import__(name) 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/core/management/commands/inspectdb.py", line 5, in <module> 
    from django.db import connections, DEFAULT_DB_ALIAS 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/db/__init__.py", line 14, in <module> 
    if not settings.DATABASES: 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/utils/functional.py", line 276, in __getattr__ 
    self._setup() 
    File "/usr/local/Cellar/python/2.7.2/lib/python2.7/site-packages/django/conf/__init__.py", line 40, in _setup 
    raise ImportError("Settings cannot be imported, because environment variable %s is undefined." % ENVIRONMENT_VARIABLE) 
ImportError: Settings cannot be imported, because environment variable DJANGO_SETTINGS_MODULE is undefined. 

我注意到，我可以开始项目就好了与python django-admin.py startproject asd。

我正在运行Python 2.7.2和Django 1.3.1。

Answer 1

django-admin.py正在寻找您的settings.py文件，该文件应位于/ Users/hobbes3/Sites/mysite中。

如果你cd进入〜/ Sites/mysite然后运行django-admin.py inspectdb doors-eer它应该可以工作。

这假设你在settings.py中有DATABASE变量设置。

另外，在创建项目之后，更常规的使用Django的方法是在创建项目后调用manage.py inspectdb。通过调用django-admin.py，环境变量不会正确设置，Django也不会找到您的settings.py文件。