python之Django 没有名为 'django.db.migrations.migration' 的模块

我的项目中有一个自定义用户模型。我想通过删除数据库中的所有 表并删除迁移来删除它并返回默认用户模型。在此之后，我尝试运行 python manage.py makemigrations 命令，但它写道:

Traceback (most recent call last): 
  File "manage.py", line 15, in <module> 
    execute_from_command_line(sys.argv) 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line 
    utility.execute() 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/core/management/__init__.py", line 347, in execute 
    django.setup() 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/__init__.py", line 24, in setup 
    apps.populate(settings.INSTALLED_APPS) 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/apps/registry.py", line 89, in populate 
    app_config = AppConfig.create(entry) 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/apps/config.py", line 116, in create 
    mod = import_module(mod_path) 
  File "/usr/lib/python3.6/importlib/__init__.py", line 126, in import_module 
    return _bootstrap._gcd_import(name[level:], package, level) 
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import 
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load 
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked 
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked 
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module 
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/contrib/contenttypes/apps.py", line 9, in <module> 
    from .management import ( 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/contrib/contenttypes/management/__init__.py", line 2, in <module> 
    from django.db import DEFAULT_DB_ALIAS, migrations, router, transaction 
  File "/home/irakliy01/Projects/Project/PythonVEnv/lib/python3.6/site-packages/django/db/migrations/__init__.py", line 1, in <module> 
    from .migration import Migration, swappable_dependency  # NOQA 
ModuleNotFoundError: No module named 'django.db.migrations.migration' 

我不知道我做错了什么。

请您参考如下方法:

您的 Django 安装似乎已损坏。您可以重新安装:

pip3 uninstall Django 
pip3 install Django 

如果您在常规操作系统的 python 安装中安装了 Django，然后安装了一个 virtualenv 副本并尝试运行 django 服务器，通常会发生这种情况。您需要在您的 virtualenv 中重新安装 Django，如果它已经存在，请先将其删除。