ldapdb："'NoneType‘对象不可调用“当向django添加ldap数据库时

Question

运行django 1.11并尝试使用django模块ldapdb连接LDAP服务器(django-ldapdb=0.8.0)：

DATABASES = {
    'ldap': {
        'ENGINE': 'ldapdb.backends.ldap',
        'NAME': 'ldap://192.168.1.39/',
    },
    'default': {
        'ENGINE': 'django.db.backends.postgresql_psycopg2', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': 'prot',                      # Or path to database file if using sqlite3.
        'USER': 'prot',                      # Not used with sqlite3.
        'PASSWORD': 'geheim',                  # Not used with sqlite3.
        'HOST': 'localhost',                      # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '5432',                      # Set to empty string for default. Not used with sqlite3.
    },
}

DATABASE_ROUTERS = ['ldapdb.router.Router']

但是，我在ldapdb代码中得到了一个错误。

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7f4ba61ff840>
Traceback (most recent call last):
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/utils/autoreload.py", line 227, in wrapper
    fn(*args, **kwargs)
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/core/management/commands/runserver.py", line 125, in inner_run
    self.check(display_num_errors=True)
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/core/management/base.py", line 359, in check
    include_deployment_checks=include_deployment_checks,
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/core/management/base.py", line 346, in _run_checks
    return checks.run_checks(**kwargs)
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/core/checks/registry.py", line 81, in run_checks
    new_errors = check(app_configs=app_configs)
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/core/checks/model_checks.py", line 30, in check_all_models
    errors.extend(model.check(**kwargs))
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/db/models/base.py", line 1284, in check
    errors.extend(cls._check_long_column_names())
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/db/models/base.py", line 1699, in _check_long_column_names
    connection = connections[db]
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/db/utils.py", line 212, in __getitem__
    conn = backend.DatabaseWrapper(db, alias)
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/ldapdb/backends/ldap/base.py", line 187, in __init__
    super(DatabaseWrapper, self).__init__(*args, **kwargs)
  File "/home/nfs/ruben/Projects/prot-zboss/venv/lib/python3.4/site-packages/django/db/backends/base/base.py", line 96, in __init__
    self.client = self.client_class(self)
TypeError: 'NoneType' object is not callable

ldapdb 0.8是最后一个版本，支持django >=1.10。

Answer 1

更新：

django-ldapdb版本必须至少为0.9。

pip install django-ldapdb>=0.9

旧岗位：

django-ldapdb目前只支持Django版本的1.8-1.10。

因此，解决方案实际上很简单：

pip install Django==1.10