我正在用 Django 做一個專案，我嘗試將資料庫從 SQLITE 更改為 Postqresql。當我嘗試創建超級用戶時，出現此錯誤。
Traceback (most recent call last):
File "manage.py", line 22, in <module>
main()
File "manage.py", line 18, in main
execute_from_command_line(sys.argv)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\core\management\__init__.py", line 419, in execute_from_command_line
utility.execute()
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\core\management\__init__.py", line 413, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\core\management\base.py", line 354, in run_from_argv
self.execute(*args, **cmd_options)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\contrib\auth\management\commands\createsuperuser.py", line 79, in execute
return super().execute(*args, **options)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\core\management\base.py", line 398, in execute
output = self.handle(*args, **options)
File "C:\Users\l\anaconda3\envs\myenv\lib\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 "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\contrib\auth\models.py", line 163, in create_superuser
return self._create_user(username, email, password, **extra_fields)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\contrib\auth\models.py", line 146, in _create_user
user.save(using=self._db)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\contrib\auth\base_user.py", line 67, in save
super().save(*args, **kwargs)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\db\models\base.py", line 726, in save
self.save_base(using=using, force_insert=force_insert,
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\db\models\base.py", line 774, in save_base
post_save.send(
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\dispatch\dispatcher.py", line 180, in send
return [
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\dispatch\dispatcher.py", line 181, in <listcomp>
(receiver, receiver(signal=self, sender=sender, **named))
File "C:\Users\l\Desktop\django-course\Django(02-09-21)\crm1\accounts\signals.py", line 7, in customer_profile
group = Group.objects.get(name='customer')
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\l\anaconda3\envs\myenv\lib\site-packages\django\db\models\query.py", line 435, in get
raise self.model.DoesNotExist(
django.contrib.auth.models.DoesNotExist: Group matching query does not exist.
設定.py
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql',
'NAME': 'DEMO_TEST',
'USER' : 'postgres',
'HOST': 'localhost',
'PASSWORD':'12345678abcdef',
'PORT': '5432',
}
}
模型.py
from django.db import models
from django.db.models.deletion import SET_NULL
from django.contrib.auth.models import User
class Customer(models.Model):
user = models.OneToOneField(User, null=True, blank=True, on_delete=models.CASCADE)
name = models.CharField(max_length=200, null=True)
phone = models.CharField(max_length=200, null=True)
email = models.CharField(max_length=200, null=True)
profile_pic = models.ImageField(default='profile1.png',null=True, blank=True)
date_created = models.DateTimeField(auto_now_add=True, null=True)
def __str__(self):
return self.name
class Tag(models.Model):
name = models.CharField(max_length=200, null=True)
def __str__(self):
return self.name
class Product(models.Model):
CATEGORY = (
('Indoor', 'Indoor'),
('Out Door', 'Out Door'),
)
name = models.CharField(max_length=200, null=True)
prince = models.FloatField(null=True)
category = models.CharField(max_length=200, null=True, choices=CATEGORY)
description = models.CharField(max_length=200, null=True, blank=True)
date_created = models.DateTimeField(auto_now_add=True, null=True)
tags = models.ManyToManyField(Tag)
def __str__(self):
return self.name
class Order(models.Model):
STATUS = (
('Pending', 'Pending'),
('Out for delivery', 'Out for delivery'),
('Delivered', 'Delivered'),
)
customer = models.ForeignKey(Customer, null=True, on_delete=SET_NULL)
product = models.ForeignKey(Product, null=True, on_delete=SET_NULL)
status = models.CharField(max_length=200, null=True, choices=STATUS)
date_created = models.DateTimeField(auto_now_add=True, null=True)
note = models.CharField(max_length=1000, null=True)
def __str__(self):
return self.product.name
當我打開Django服務器時，專案作業正常；問題是當我嘗試從終端創建超級用戶時。我不確定問題是否來自 Postgresql 資料庫與專案之間的連接，或者是否是在 Django 的默認資料庫（SQLITE）中創建和加載的模型的遷移問題......這將是一些很好的幫助，非常感謝你
uj5u.com熱心網友回復：
確保你已經安裝了psycopg2，它是 python 的 postresql 的配接器。還要確保您已將所有遷移應用到您的資料庫。
PS這聽起來像在你的代碼的某個地方你寫道：group = Group.objects.get(name='customer')。該組物件不存在，因此 django 會拋出例外。
uj5u.com熱心網友回復：
嘗試再進行一次遷移：python manage.py makemigrations&&python manage.py migrate然后python manage.py createsuperuser。
轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/385346.html
標籤：Python 姜戈 PostgreSQL的