Phusion 乘客应用服务器无法启动 Web 应用程序，ModuleNotFoundError - Django [已解决]

如何解决Phusion 乘客应用服务器无法启动 Web 应用程序，ModuleNotFoundError - Django [已解决]

当我使用 pip install -e git+https://github.com/breduin/das.git#egg=django_ajax_selects 从 github 安装第三个站点应用程序时，我的站点无法启动并出现以下错误：

Web application Could not be started by the Phusion Passenger application server.



/usr/share/passenger/helper-scripts/wsgi-loader.py:26: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
  import sys,os,re,imp,threading,signal,traceback,socket,select,struct,logging,errno
Traceback (most recent call last):
  File "/usr/share/passenger/helper-scripts/wsgi-loader.py",line 369,in <module>
    app_module = load_app()
  File "/usr/share/passenger/helper-scripts/wsgi-loader.py",line 76,in load_app
    return imp.load_source('passenger_wsgi',startup_file)
  File "/opt/python/python-3.8.6/lib/python3.8/imp.py",line 171,in load_source
    module = _load(spec)
  File "<frozen importlib._bootstrap>",line 702,in _load
  File "<frozen importlib._bootstrap>",line 671,in _load_unlocked
  File "<frozen importlib._bootstrap_external>",line 783,in exec_module
  File "<frozen importlib._bootstrap>",line 219,in _call_with_frames_removed
  File "/var/www/u1234567/data/www/mysite/passenger_wsgi.py",line 7,in <module>
    application = get_wsgi_application()
  File "/var/www/u1234567/data/env/lib/python3.8/site-packages/django/core/wsgi.py",line 12,in get_wsgi_application
    django.setup(set_prefix=False)
  File "/var/www/u1234567/data/env/lib/python3.8/site-packages/django/__init__.py",line 24,in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/var/www/u1234567/data/env/lib/python3.8/site-packages/django/apps/registry.py",line 91,in populate
    app_config = AppConfig.create(entry)
  File "/var/www/u1234567/data/env/lib/python3.8/site-packages/django/apps/config.py",line 90,in create
    module = import_module(entry)
  File "/opt/python/python-3.8.6/lib/python3.8/importlib/__init__.py",line 127,in import_module
    return _bootstrap._gcd_import(name[level:],package,level)
  File "<frozen importlib._bootstrap>",line 1014,in _gcd_import
  File "<frozen importlib._bootstrap>",line 991,in _find_and_load
  File "<frozen importlib._bootstrap>",line 973,in _find_and_load_unlocked
ModuleNotFoundError: No module named 'ajax_select'

在目录env/lib/python3.8/site-packages/中，通常放置PyPI的所有包的地方可以找到egg文件， django-ajax-selects.egg-link

/var/www/u1234567/data/env/src/django-ajax-selects
.

路径正确，应用django-ajax-selects就放在那里。

如果没有来自 github 的这个应用程序和来自 PyPI 的其他应用程序，我的网站就可以正常启动。服务器似乎无法识别蛋链接或路径，但我不知道如何更正。

解决方法

SO-effect，在写问题时我自己找到了答案：需要在 passenger_wsgi.py 中添加包的路径（在 egg-link 文件中）：

# -*- coding: utf-8 -*-
import os,sys
sys.path.insert(0,'/var/www/u1234567/data/www/mysite/mysite')
sys.path.insert(1,'/var/www/u1234567/data/env/lib/python3.8/site-packages')
sys.path.insert(2,'/var/www/u1234567/data/env/src/django-ajax-selects')     #<---- this path
os.environ['DJANGO_SETTINGS_MODULE'] = 'mysite.settings'
from django.core.wsgi import get_wsgi_application
application = get_wsgi_application()