Question

我是django的新手，坚持迁移过程，因为初学者无法从错误消息中找到有价值的信息。需要有关迁移和数据库连接与应用程序进程的帮助。

点子列表

Django (1.11.2)
django-mssql (1.8)
mysqlclient (1.3.10)
pip (9.0.1)
pytz (2017.2)
setuptools (28.8.0)
wheel (0.29.0)
Python 3.6.1

安装用于ms sql server的Python包管理使用bellow命令

pip install django-mssql

我的应用模式

from django.db import models

# Create your models here.

class Video(models.Model):
    title=models.CharField("Title",max_length=250)
    embed_code=models.TextField("Embed code")

我的django应用程序数据库设置如下

DATABASES = {
    'default': {
        'NAME': 'djangolife',# db name
        'ENGINE': 'sqlserver_ado',
        'HOST': 'DESKTOP-SVHDHF8\\MSSQLSERVER2014',#Sql server name
        'USER': 'sa',
        'PASSWORD': 'sa123',
    }
}

迁移命令

 python manage.py makemigrations

执行上述迁移命令后出现以下错误

Traceback (most recent call last):
  File "manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\management\__init__.py", line 363, in execute_from_command_line
    utility.execute()
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\core\management\__init__.py", line 337, in execute
    django.setup()
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\__init__.py", line 27, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\apps\registry.py", line 108, in populate
    app_config.import_models()
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\apps\config.py", line 202, in import_models
    self.models_module = import_module(models_module_name)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 978, in _gcd_import
  File "<frozen importlib._bootstrap>", line 961, in _find_and_load
  File "<frozen importlib._bootstrap>", line 950, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 655, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 205, in _call_with_frames_removed
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\contrib\auth\models.py", line 4, in <module>
    from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\contrib\auth\base_user.py", line 52, in <module>
    class AbstractBaseUser(models.Model):
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\base.py", line 124, in __new__
    new_class.add_to_class('_meta', Options(meta, app_label))
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\base.py", line 330, in add_to_class
    value.contribute_to_class(cls, name)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\models\options.py", line 214, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\__init__.py", line 33, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\utils.py", line 212, in __getitem__
    conn = backend.DatabaseWrapper(db, alias)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\sqlserver_ado\base.py", line 184, in __init__
    super(DatabaseWrapper, self).__init__(*args, **kwargs)
  File "C:\Users\shamim\AppData\Local\Programs\Python\Python36-32\lib\site-packages\django\db\backends\base\base.py", line 96, in __init__
    self.client = self.client_class(self)
TypeError: 'NoneType' object is not callable

Answer 1

我有同样的问题，我发现原因是django-mssql support Django 1.8，但你使用的是Django 1.11。请降级您的Django版本或等到最新版本支持。

Django应用程序无法连接ms sql server 2014

1 个答案: