无法进行迁移

如何解决无法进行迁移

我写了 python3 manage.py makemigrations（我有一台 mac），迁移没有完成，我收到很多错误，但我根本不了解该项目，这里是回溯

Traceback (most recent call last):
  File "/Users/work/Projects/ims/api/manage.py",line 21,in <module>
    main()
  File "/Users/work/Projects/ims/api/manage.py",line 17,in main
    execute_from_command_line(sys.argv)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/core/management/__init__.py",line 419,in execute_from_command_line
    utility.execute()
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/core/management/__init__.py",line 363,in execute
    settings.INSTALLED_APPS
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/conf/__init__.py",line 82,in __getattr__
    self._setup(name)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/conf/__init__.py",line 69,in _setup
    self._wrapped = Settings(settings_module)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/conf/__init__.py",line 170,in __init__
    mod = importlib.import_module(self.SETTINGS_MODULE)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/__init__.py",line 127,in import_module
    return _bootstrap._gcd_import(name[level:],package,level)
  File "<frozen importlib._bootstrap>",line 1030,in _gcd_import
  File "<frozen importlib._bootstrap>",line 1007,in _find_and_load
  File "<frozen importlib._bootstrap>",line 986,in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>",line 680,in _load_unlocked
  File "<frozen importlib._bootstrap_external>",line 855,in exec_module
  File "<frozen importlib._bootstrap>",line 228,in _call_with_frames_removed
  File "/Users/work/Projects/ims/api/ims/settings.py",line 35,in <module>
    hostname,_,ips = socket.gethostbyname_ex(socket.gethostname())
socket.gaierror: [Errno 8] nodename nor servname provided,or not kNown

ims/api/ims/settings.py

"""
Django settings for ims project.

Generated by 'django-admin startproject' using Django 2.2.

For more information on this file,see
https://docs.djangoproject.com/en/2.2/topics/settings/

For the full list of settings and their values,see
https://docs.djangoproject.com/en/2.2/ref/settings/
"""

import os
import socket

import sentry_sdk
from sentry_sdk.integrations.django import DjangoIntegration

# Build paths inside the project like this: os.path.join(BASE_DIR,...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/

# Security WARNING: keep the secret key used in production secret!
SECRET_KEY = os.environ.get('SECRET_KEY','mysecretkey')

# Security WARNING: don't run with debug turned on in production!
DEBUG = os.environ.get('DEBUG',False)

ALLOWED_HOSTS = os.environ.get('ALLOWED_HOSTS','example.com').split(',')

INTERNAL_IPS = os.environ.get('INTERNAL_IPS','127.0.0.1').split(',')

hostname,ips = socket.gethostbyname_ex(socket.gethostname())
INTERNAL_IPS += [ip[:-1] + "1" for ip in ips]

# Application deFinition

INSTALLED_APPS = [
    # Locale apps
    'clients','companies','loyalty','personnel','products','shops','Trades',# Third party apps
    'corsheaders','django_filters','djoser','gtin_fields','mptt','rest_framework','rest_framework.authtoken',# Django modules
    'django.contrib.admin','django.contrib.auth','django.contrib.contenttypes','django.contrib.sessions','django.contrib.messages','django.contrib.staticfiles','django.contrib.sites',]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware','django.contrib.sessions.middleware.SessionMiddleware','corsheaders.middleware.CorsMiddleware','django.middleware.common.CommonMiddleware','django.middleware.csrf.CsrfViewMiddleware','django.contrib.auth.middleware.AuthenticationMiddleware','django.contrib.messages.middleware.MessageMiddleware','django.middleware.clickjacking.XFrameOptionsMiddleware','django_currentuser.middleware.ThreadLocalUserMiddleware',]

ROOT_URLconf = 'ims.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates','Dirs': [os.path.join(BASE_DIR,'ims/templates')],'APP_Dirs': True,'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug','django.template.context_processors.request','django.contrib.auth.context_processors.auth','django.contrib.messages.context_processors.messages',],},]

Wsgi_APPLICATION = 'ims.wsgi.application'

# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql','NAME': os.environ.get('DATABASE_NAME'),'USER': os.environ.get('DATABASE_USER'),'PASSWORD': os.environ.get('DATABASE_PASSWORD'),'HOST': os.environ.get('DATABASE_HOST'),'PORT': os.environ.get('DATABASE_POST'),}
}

# MIGRATIONS
# https://docs.djangoproject.com/en/dev/ref/settings/#migration-modules

MIGRATION_MODULES = {
    'sites': 'sites.migrations',}

# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators

if not DEBUG:
    AUTH_PASSWORD_VALIDATORS = [
        {
            'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',{
            'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',{
            'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',{
            'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',]

AUTH_USER_MODEL = 'companies.User'
SESSION_ENGINE = 'django.contrib.sessions.backends.cached_db'

EMAIL_HOST = os.environ.get('EMAIL_HOST','example.com')
EMAIL_HOST_USER = os.environ.get('EMAIL_HOST_USER','')
EMAIL_HOST_PASSWORD = os.environ.get('EMAIL_HOST_PASSWORD','')
EMAIL_PORT = os.environ.get('EMAIL_PORT',25)
EMAIL_USE_TLS = os.environ.get('EMAIL_USE_TLS',False)
EMAIL_USE_SSL = os.environ.get('EMAIL_USE_SSL',False)
DEFAULT_FROM_EMAIL = os.environ.get('DEFAULT_FROM_EMAIL','webmaster@example.com')

if DEBUG:
    EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'

# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/

LANGUAGE_CODE = 'ru'

TIME_ZONE = 'Europe/Moscow'

USE_I18N = True

USE_L10N = True

USE_TZ = True

# Sites
# https://docs.djangoproject.com/en/2.1/ref/contrib/sites/#enabling-the-sites-framework

SITE_ID = 1
SITE_NAME = os.environ.get('SITE_NAME',None)
SITE_DOMAIN = os.environ.get('SITE_DOMAIN',None)

# Static files (CSS,JavaScript,Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR,'staticfiles')
STATICFILES_Dirs = [os.path.join(BASE_DIR,'ims/static')]

MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR,'media')

# Sentry
# https://sentry.io/cryptoins-el/eplatform/getting-started/python-django/

SENTRY_DSN = os.environ.get('SENTRY_DSN',None)

sentry_sdk.init(
    dsn=SENTRY_DSN,integrations=[DjangoIntegration()]
)

# Django REST Framework
# https://www.django-rest-framework.org/

REST_FRAMEWORK = {
    'DEFAULT_FILTER_BACKENDS': ('django_filters.rest_framework.DjangoFilterBackend',),'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.TokenAuthentication','rest_framework.authentication.SessionAuthentication','TEST_REQUEST_DEFAULT_FORMAT': 'json',}

# Django Cors Headers
# https://github.com/ottoyiu/django-cors-headers#setup

CORS_ORIGIN_ALLOW_ALL = True

# Django Debug Toolbar
# https://github.com/jazzband/django-debug-toolbar

if DEBUG:
    INSTALLED_APPS.append('debug_toolbar')
    MIDDLEWARE = ['debug_toolbar.middleware.DebugToolbarMiddleware',*MIDDLEWARE]
    DEBUG_TOOLBAR_CONfig = {
        'SHOW_TOOLBAR_CALLBACK': lambda request: True,}

# djoser
# https://djoser.readthedocs.io/en/latest/settings.html

DJOSER = {
    'PASSWORD_RESET_CONFIRM_URL': 'password-reset/{uid}/{token}','SET_PASSWORD_RETYPE': True,'USER_CREATE_PASSWORD_RETYPE': True,'SERIALIZERS': {
        'user_create_password_retype': 'ims.serializers.imsUserCreatePasswordRetypeSerializer','user': 'companies.serializers.UserCustomSerializer'
    }
}

编辑了 /etc/hosts 文件并重复了 python3 manage.py makemigrations 命令，但出现此错误

Traceback (most recent call last):
  File "/Users/work/Projects/ims/api/manage.py",line 395,in execute
    django.setup()
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/__init__.py",line 24,in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/apps/registry.py",line 91,in populate
    app_config = AppConfig.create(entry)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/apps/config.py",line 224,in create
    import_module(entry)
  File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/importlib/__init__.py",line 984,in _find_and_load_unlocked
ModuleNotFoundError: No module named 'corsheaders'

团队中的teamlead做了类似migrations的事情，然后应用了，现在，在models.py中添加索引，优化SQL查询后，我需要做migrations，但是没有成功，但是服务器启动时没有migrations

我不知道要显示哪些文件，因为我不了解项目中的代码，因为我是 django 的新手，但我始终保持联系，并且会丢弃您需要的任何文件

谢谢！

解决方法

您已在 etc/hosts 文件中设置机器主机名

找到机器名称（https://help.edovia.com/hc/en-us/articles/360002865213-Finding-your-computer-s-hostname-or-IP-address）
编辑 /etc/hosts 文件

127.0.0.1 Naveens-MacBook-Pro.local（其中 Naveens-MacBook-Pro 是我的机器名称）

以上变化是针对 MAC 机器的。

从头开始重新构建这个项目。

如何解决无法进行迁移

解决方法

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