django-ldapdb

django-ldapdb, an LDAP database backend for Django

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django-ldapdb

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django-ldapdb is an LDAP database backend for Django, allowing to manipulate LDAP entries through Django models.

It supports most of the same APIs as a Django model:

  • MyModel.objects.create()
  • MyModel.objects.filter(x=1, y__contains=2)
  • Full admin support and browsing

django-ldapdb supports every upstream-supported Django version, based on the Django support policy <https://www.djangoproject.com/download/#supported-versions>_.

For the current version, the following versions are supported:

  • Django 2.2 (LTS), under Python 3.6 - 3.8 (Python 3.5 has reached its end of life);
  • Django 3.0, under Python 3.6 - 3.8;
  • Django 3.1, under Python 3.6 - 3.8.

Installing django-ldapdb

Linux


Use pip: ``pip install django-ldapdb``

You might also need the usual ``LDAP`` packages from your distribution, usually named ``openldap`` or ``ldap-utils``.


Windows

django-ldapdb depends on the python-ldap <https://pypi.python.org/pypi/python-ldap> project. Either follow its Windows installation guide <https://www.python-ldap.org/en/latest/installing.html>_, or install a pre-built version from https://www.lfd.uci.edu/~gohlke/pythonlibs/#python-ldap (choose the .whl file matching your Python/Windows combination, and install it with pip install python-ldap-3...whl).

You may then install django-ldapdb with

pip install django-ldapdb

Using django-ldapdb

Add the following to your settings.py:

.. code-block:: python

DATABASES = {
    'ldap': {
        'ENGINE': 'ldapdb.backends.ldap',
        'NAME': 'ldap://ldap.nodomain.org/',
        'USER': 'cn=admin,dc=nodomain,dc=org',
        'PASSWORD': 'some_secret_password',
     },
    'default': {
        'ENGINE': 'django.db.backends.sqlite3',
        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
     },
}
DATABASE_ROUTERS = ['ldapdb.router.Router']

If you want to access posixGroup entries in your application, you can add something like this to your models.py:

.. code-block:: python

from ldapdb.models.fields import CharField, IntegerField, ListField
import ldapdb.models

class LdapGroup(ldapdb.models.Model):
    """
    Class for representing an LDAP group entry.
    """
    # LDAP meta-data
    base_dn = "ou=groups,dc=nodomain,dc=org"
    object_classes = ['posixGroup']

    # posixGroup attributes
    gid = IntegerField(db_column='gidNumber', unique=True)
    name = CharField(db_column='cn', max_length=200, primary_key=True)
    members = ListField(db_column='memberUid')

    def __str__(self):
        return self.name

    def __unicode__(self):
        return self.name

and add this to your admin.py:

.. code-block:: python

from django.contrib import admin
from . import models

class LDAPGroupAdmin(admin.ModelAdmin):
    exclude = ['dn', 'objectClass']
    list_display = ['gid', 'name']

admin.site.register(models.LDAPGroup, LDAPGroupAdmin)

Important note: You must declare an attribute to be used as the primary key. This attribute will play a special role, as it will be used to build the Relative Distinguished Name of the entry.

For instance in the example above, a group whose cn is ``foo``
will have the DN ``cn=foo,ou=groups,dc=nodomain,dc=org``.

Supported fields

djanglo-ldapdb provides the following fields, all imported from ldapdb.models.fields:

Similar to Django:

* ``IntegerField``
* ``FloatField``
* ``BooleanField``
* ``CharField``
* ``ImageField``
* ``DateTimeField``

Specific to a LDAP server:

* ``ListField`` (holds a list of text values)
* ``TimestampField`` (Stores a datetime as a posix timestamp, typically for posixAccount)

Legacy:

* ``DateField`` (Stores a date in an arbitrary format. A LDAP server has no notion of ``Date``).

Tuning django-ldapdb

It is possible to adjust django-ldapdb's behavior by defining a few parameters in the DATABASE section:

PAGE_SIZE (default: 1000) Define the maximum size of a results page to be returned by the server

QUERY_TIMEOUT (default: no limit) Define the maximum time in seconds we'll wait to get a reply from the server (on a per-query basis).

.. note:: This setting applies on individual requests; if a high-level operation requires many
          queries (for instance a paginated search yielding thousands of entries),
          the timeout will be used on each individual request;
          the overall processing time might be much higher.

Developing with a LDAP server

When developing against a LDAP server, having access to a development LDAP server often proves useful.

django-ldapdb uses the volatildap project <https://pypi.org/project/volatildap>_ for this purpose:

  • A LDAP server is instantiated for each TestClass;
  • Its content is reset at the start of each test function;
  • It can be customized to embark any schemas required by the application;
  • Starting with volatildap 1.4.0, the volatildap server can be controlled remotely, avoiding the need to install a LDAP server on the host.

Applications using django-ldapdb may use the following code snippet when setting up their tests:

.. code-block:: python

# This snippet is released in the Public Domain

from django.conf import settings
from django.test import TestCase

import volatildap

class LdapEnabledTestCase(TestCase):
    @classmethod
    def setUpClass(cls):
        super().setUpClass()
        cls.ldap = volatildap.LdapServer(
            # Load some initial data
            initial={'ou=people': {
                'ou': ['people'],
                'objectClass': ['organizationalUnit'],
            }},
            # Enable more LDAP schemas
            schemas=['core.schema', 'cosine.schema', 'inetorgperson.schema', 'nis.schema'],
        )
        # The volatildap server uses specific defaults, and listens on an arbitrary port.
        # Copy the server-side values to Django settings
        settings.DATABASES['ldap']['USER'] = cls.ldap.rootdn
        settings.DATABASES['ldap']['PASSWORD'] = cls.ldap.rootpw
        settings.DATABASES['ldap']['NAME'] = cls.ldap.uri

    def setUp(self):
        super().setUp()
        # Starting an already-started volatildap server performs a data reset
        self.ldap.start()

    @classmethod
    def tearDownClass(cls):
        # Free up resources on teardown.
        cls.ldap.stop()
        super().tearDownClass()

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