无法在 GeoDjango 应用程序中同步数据库

我在设置空间数据库并将其与 GeoDjango 同步时遇到了真正的麻烦。我能够根据 geodjango 文档设置空间数据库并创建一个 django 应用程序，但是当我运行时

python manage.py sqlall world

我明白了，

Traceback (most recent call last):
  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 261, in fetch_command
    klass = load_command_class(app_name, subcommand)
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 69, in load_command_class
    module = import_module('%s.management.commands.%s' % (app_name, name))
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/utils/importlib.py", line 35, in import_module
    __import__(name)
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/core/management/commands/sqlall.py", line 4, in <module>
    from django.core.management.sql import sql_all
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/core/management/sql.py", line 6, in <module>
    from django.db import models
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/db/__init__.py", line 40, in <module>
    backend = load_backend(connection.settings_dict['ENGINE'])
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/db/__init__.py", line 34, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/db/utils.py", line 92, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/home/smaranh/django-env/local/lib/python2.7/site-packages/django/db/utils.py", line 44, in load_backend
    raise ImproperlyConfigured(error_msg)
django.core.exceptions.ImproperlyConfigured: 'django.contrib.gis.db.backends.postgis' isn't an available database backend.
Try using django.db.backends.XXX, where XXX is one of:
    'dummy', 'mysql', 'oracle', 'postgresql_psycopg2', 'sqlite3'
Error was: No module named psycopg2.extensions

我很累，真的不知道该做什么？请帮忙

EDIT

好的，我找到了这个link https://stackoverflow.com/questions/1383126/django-python-beginner-error-when-executing-python-manage-py-syncdb-psycopg2这告诉我出了什么问题。现在当我进入python来自 \home，然后我执行import psycopg2它没有给我任何 ImportError 但是当我在虚拟环境中时，我得到了 ImportError

(django-env)smaranh@ubuntu:~/geodjango$ python
Python 2.7.2+ (default, Oct  4 2011, 20:06:09) 
[GCC 4.6.1] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import psycopg2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named psycopg2

现在，该链接指导我如何附加路径，但我并没有真正理解这个过程，因为我是新人，我不想进一步搞砸它。那么有人可以逐步指导我如何附加sys.path??

如果您使用 virtualenv，则需要在环境中安装 psycopg2，如下所示：

pip install psycopg2 

但在此之前你需要使用 apt 安装一些软件包：

sudo apt-get install python-dev postgresql-server-dev-all