python - django-cms makemigrations错误: No module named 'packaging'

Question

我开始使用 django-cms，并尝试从官方 cms 文档安装 cms。我创建了虚拟环境并安装了 Django 和 django-cms。

接下来的步骤是使用 django-admin 创建一个项目，并在已安装的应用程序中添加 django-cms。到目前为止，该项目进展顺利。但是，当我尝试迁移数据库中已安装的应用程序时，我收到错误“没有名为“打包”的模块”。我不明白我做错了什么。另一个教程告诉我使用

djangocms myproject

启动项目 但它不起作用(它可能已经过时了，因为我在其他地方找不到任何变体)

我的设置.py:

INSTALLED_APPS = [
    'djangocms_admin_style',
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.sites',
    'cms',
    'menus',
    'treebeard',
]

SITE_ID = 1

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': BASE_DIR / 'db.sqlite3',
    }
}

LANGUAGE_CODE = 'en'
LANGUAGES = [
    ('en', 'English'),
]

此后，我运行 py 管理.py makemigrations 但我收到错误

Traceback (most recent call last):
  File "E:\art\Graphic Design\Coding\law-&-stuff\myproject\manage.py", line 22, in <module>
    main()
  File "E:\art\Graphic Design\Coding\law-&-stuff\myproject\manage.py", line 18, in main
    execute_from_command_line(sys.argv)
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\django\core\management\__init__.py", line 446, in execute_from_command_line
    utility.execute()
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\django\core\management\__init__.py", line 420, in execute
    django.setup()
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\django\__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\django\apps\registry.py", line 116, in populate
    app_config.import_models()
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\django\apps\config.py", line 269, in import_models
    self.models_module = import_module(models_module_name)
                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\Python311\Lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "<frozen importlib._bootstrap>", line 1206, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1178, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1149, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 690, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 940, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\cms\models\__init__.py", line 4, in <module>
    from .placeholdermodel import *  # nopyflakes
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\cms\models\placeholdermodel.py", line 14, in <module>
    from cms.utils import get_language_from_request, get_site_id, permissions
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\cms\utils\permissions.py", line 13, in <module>
    from cms.utils.compat.dj import available_attrs
  File "E:\art\Graphic Design\Coding\law-&-stuff\venv\Lib\site-packages\cms\utils\compat\__init__.py", line 4, in <module>
    from packaging.version import Version
ModuleNotFoundError: No module named 'packaging'

我正在关注 https://docs.django-cms.org/en/latest/how_to/install.html 的文档。我认为这可能与软件包的安装方式有关？但是，我不明白如何解决它。

Answer 1

找到解决方案了!
默认情况下未安装打包模块，我使用 py -m pip install --upgrade pip 升级了我的 pip 并使用 py -m pip install package 安装了该模块，并且它现在可以工作了。