将 Vagrant 和 VM 与 python-django 和 PostgreSQL 一起使用

Question

我正在尝试在安装了 Python/Django 2.7.6 和 PostgreSQL 9.3.4 的 VM 上创建一个 python-django 项目。

我正在关注this 教程。在postgres的settings.py中创建changes后，当我做vagrant up和vagrant ssh，在python manage.py syncdb之后，它显示以下错误。

 File "manage.py", line 10, in <module>
execute_from_command_line(sys.argv)
 File "/usr/lib/python2.7/dist-packages/django/core/management/__init__.py", line 399, in execute_from_command_line
utility.execute()
 File "/usr/lib/python2.7/dist-packages/django/core/management/__init__.py", line 392, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
 File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 242, in run_from_argv
self.execute(*args, **options.__dict__)
File "/usr/lib/python2.7/dist-packages/django/core/management/base.py", line 280, in execute
translation.activate('en-us')
File "/usr/lib/python2.7/dist-packages/django/utils/translation/__init__.py", line 130, in activate
return _trans.activate(language)
File "/usr/lib/python2.7/dist-packages/django/utils/translation/trans_real.py", line 188, in activate
_active.value = translation(language)
File "/usr/lib/python2.7/dist-packages/django/utils/translation/trans_real.py", line 177, in translation
default_translation = _fetch(settings.LANGUAGE_CODE)
File "/usr/lib/python2.7/dist-packages/django/utils/translation/trans_real.py", line 159, in _fetch
app = import_module(appname)
File "/usr/lib/python2.7/dist-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/usr/lib/python2.7/dist-packages/django/contrib/admin/__init__.py", line 6, in <module>
from django.contrib.admin.sites import AdminSite, site
File "/usr/lib/python2.7/dist-packages/django/contrib/admin/sites.py", line 4, in <module>
from django.contrib.admin.forms import AdminAuthenticationForm
File "/usr/lib/python2.7/dist-packages/django/contrib/admin/forms.py", line 6, in <module>
from django.contrib.auth.forms import AuthenticationForm
File "/usr/lib/python2.7/dist-packages/django/contrib/auth/forms.py", line 17, in <module>
from django.contrib.auth.models import User
File "/usr/lib/python2.7/dist-packages/django/contrib/auth/models.py", line 48, in <module>
class Permission(models.Model):
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 96, in __new__
new_class.add_to_class('_meta', Options(meta, **kwargs))
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 264, in add_to_class
value.contribute_to_class(cls, name)
File "/usr/lib/python2.7/dist-packages/django/db/models/options.py", line 124, in contribute_to_class
self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
File "/usr/lib/python2.7/dist-packages/django/db/__init__.py", line 34, in __getattr__
return getattr(connections[DEFAULT_DB_ALIAS], item)
File "/usr/lib/python2.7/dist-packages/django/db/utils.py", line 198, in __getitem__
backend = load_backend(db['ENGINE'])
File "/usr/lib/python2.7/dist-packages/django/db/utils.py", line 113, in load_backend
return import_module('%s.base' % backend_name)
File "/usr/lib/python2.7/dist-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/usr/lib/python2.7/dist-packages/django/db/backends/postgresql_psycopg2/base.py", line 25, in <module>
raise ImproperlyConfigured("Error loading psycopg2 module: %s" % e)

django.core.exceptions.ImproperlyConfigured：加载 psycopg2 模块时出错：没有名为 psycopg2 的模块

还有一件事，我可以在 VM 上使用 SQLite 运行项目。

怎么办？

Answer 1

pyscopg2 是通常用于与 Postgresql 交互的 Python 模块的名称。您需要安装它。

您应该能够使用带有pip install psycopg2 的 Pip 安装它。通常可以使用您的包管理器找到 Pip 本身 - 例如，在 Ubuntu 上，IIRC 该包被称为 Python 2 的 python-pip 和 Python 3 的 python3-pip。