django - createsuperuser 仅在 postgresql 上失败
问题描述
我可以使用 sqlite3 让我的代码和数据库在本地正常工作。但是当我尝试迁移到 postgresql 平台时，我在尝试创建超级用户时遇到错误，但没有 migrate 或 makemigration。
(trader) bubba@tuna:~/www/src/trader $ ./manage.py makemigrations
No changes detected
(trader) bubba@tuna:~/www/src/trader $ ./manage.py migrate
Operations to perform:
Apply all migrations: accounts, admin, auth, contenttypes, sessions
Running migrations:
No migrations to apply.
(trader) bubba@tuna:~/www/src/trader $ ./manage.py createsuperuser
Username (leave blank to use 'bubba'):
Email address: bubba@trader.com
Password:
Password (again):
Traceback (most recent call last):
File "./manage.py", line 21, in <module>
main()
File "./manage.py", line 17, in main
execute_from_command_line(sys.argv)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/core/management/__init__.py", line 401, in execute_from_command_line
utility.execute()
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/core/management/__init__.py", line 395, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/core/management/base.py", line 328, in run_from_argv
self.execute(*args, **cmd_options)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 79, in execute
return super().execute(*args, **options)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/core/management/base.py", line 369, in execute
output = self.handle(*args, **options)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/contrib/auth/management/commands/createsuperuser.py", line 189, in handle
self.UserModel._default_manager.db_manager(database).create_superuser(**user_data)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/contrib/auth/models.py", line 158, in create_superuser
return self._create_user(username, email, password, **extra_fields)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/contrib/auth/models.py", line 141, in _create_user
user.save(using=self._db)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/contrib/auth/base_user.py", line 66, in save
super().save(*args, **kwargs)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/db/models/base.py", line 746, in save
force_update=force_update, update_fields=update_fields)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/db/models/base.py", line 795, in save_base
update_fields=update_fields, raw=raw, using=using,
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/dispatch/dispatcher.py", line 175, in send
for receiver in self._live_receivers(sender)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/dispatch/dispatcher.py", line 175, in <listcomp>
for receiver in self._live_receivers(sender)
File "/home/bubba/www/src/trader/accounts/signals.py", line 10, in customer_profile
group = Group.objects.get(name='customer')
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/home/bubba/Env/trader/lib/python3.7/site-packages/django/db/models/query.py", line 417, in get
self.model._meta.object_name
django.contrib.auth.models.DoesNotExist: Group matching query does not exist.
这些是我的设置
$ cat trader/settings.py
"""
Django settings for trader project.
Generated by 'django-admin startproject' using Django 3.0.6.
For more information on this file, see
https://docs.djangoproject.com/en/3.0/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/3.0/ref/settings/
"""
import os
# 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/3.0/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'boo'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = ['127.0.0.1', '192.168.42.14']
ALLOWED_CIDR_NETS = ['192.168.42.0/24']
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'accounts.apps.AccountsConfig',
'django_filters',
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'trader.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'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 = 'trader.wsgi.application'
# Database
# https://docs.djangoproject.com/en/3.0/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'NAME': 'expungee',
'USER':'boo',
'PASSWORD':'boo',
'HOST':'192.168.42.13',
'PORT':'5432',
}
}
#DATABASES = {
# 'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, '/home/bubba/www/src/trader/db.sqlite3'),
# }
#}
# Password validation
# https://docs.djangoproject.com/en/3.0/ref/settings/#auth-password-validators
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',
},
]
# Internationalization
# https://docs.djangoproject.com/en/3.0/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/
STATIC_URL = '/static/'
MEDIA_URL = '/images/'
STATIC_ROOT = os.path.join(BASE_DIR, "static/")
STATICFILES_DIRS = [
os.path.join(BASE_DIR, '/static')
]
MEDIA_ROOT = os.path.join(BASE_DIR, 'static/images')
我确实尝试过
django.db.backends.postgresql
但甚至无法连接。
exchangedb=# \du
List of roles
Role name | Attributes | Member of
---------------+------------------------------------------------------------+-----------
administrator | Superuser, Create role, Create DB | {}
expungee | Superuser, Create role, Create DB | {}
expungeedb | | {}
postgres | Superuser, Create role, Create DB, Replication, Bypass RLS | {}
如何迁移到 postgres？
更新：
$ cat accounts/signals.py
from django.db.models.signals import post_save
from django.contrib.auth.models import User
from django.contrib.auth.models import Group
from .models import Customer
def customer_profile(sender, instance, created, **kwargs):
if created:
group = Group.objects.get(name='customer')
instance.groups.add(group)
Customer.objects.create(
user=instance,
name=instance.username,
)
print('Profile created!')
post_save.connect(customer_profile, sender=User)
解决方案
将此行替换为 get 或 create 调用
group, created = Group.objects.get_or_create(name='customer')