Django-MongoEngine

THIS IS UNSTABLE PROJECT, IF YOU WANT TO USE IT - FIX WHAT YOU NEED

Right now we're targeting to get things working on Django 4.2;

WARNING: This project is not in good state, and is likely to break with django updates. Do not use it for any new projects.

Recommended way for new projects is django-mongodb-backend.

Working / Django 4.2

• [ok] sessions
• [ok] models/fields, fields needs testing
• [ok] views
• [ok] auth
• [?] admin - partially working, some things broken

Current status

Many parts of projects rewritten/removed; Instead of copying django code i try to subclass/reuse/even monkey-patch; Everything listed above is working; admin - just base fuctions like changelist/edit, not tested with every form type; need's more work.

Some code just plaholder to make things work; django/forms/document_options.py - dirty hack absolutely required to get thigs work with django. It replaces mongo _meta on model/class and provide django-like interface. It get's replaced after class creation via some metaclass magick.

Fields notes

• Project uses mongoengine style argument required=False, not django style blank=False, to be compatible with mongo-types. All your fields are optional by default.

TODO

• Sync some files/docs that removed from mongoengine: https://github.com/seglberg/mongoengine/commit/a34f4c1beb93f430c37da20c8fd96ce02a0f20c1?diff=unified
• Add docs for integrating: https://github.com/hmarr/django-debug-toolbar-mongo
• Take a look at django-mongotools: https://github.com/wpjunior/django-mongotools

Connecting

In your settings.py file, add following lines:

MONGODB_DATABASES = {
    "default": {
        "name": database_name,
        "host": database_host,
        "password": database_password,
        "username": database_user,
        "tz_aware": True, # if you using timezones in django (USE_TZ = True)
    },
}

INSTALLED_APPS += ["django_mongoengine"]

Documents

Inhherit your documents from django_mongoengine.Document, and define fields using django_mongoengine.fields.:

from django_mongoengine import Document, EmbeddedDocument, fields

class Comment(EmbeddedDocument):
    created_at = fields.DateTimeField(
        default=datetime.datetime.now, editable=False,
    )
    author = fields.StringField(verbose_name="Name", max_length=255)
    email  = fields.EmailField(verbose_name="Email")
    body = fields.StringField(verbose_name="Comment")

class Post(Document):
    created_at = fields.DateTimeField(
        default=datetime.datetime.now, editable=False,
    )
    title = fields.StringField(max_length=255)
    slug = fields.StringField(max_length=255, primary_key=True)
    comments = fields.ListField(
        fields.EmbeddedDocumentField('Comment'), required=False,
    )

Sessions

Django allows the use of different backend stores for its sessions. MongoEngine provides a MongoDB-based session backend for Django, which allows you to use sessions in your Django application with just MongoDB. To enable the MongoEngine session backend, ensure that your settings module has 'django.contrib.sessions.middleware.SessionMiddleware' in the MIDDLEWARE_CLASSES field and 'django.contrib.sessions' in your INSTALLED_APPS. From there, all you need to do is add the following line into your settings module:

SESSION_ENGINE = 'django_mongoengine.sessions'
SESSION_SERIALIZER = 'django_mongoengine.sessions.BSONSerializer'

Django provides session cookie, which expires after `SESSION_COOKIE_AGE` seconds, but doesn't delete cookie at sessions backend, so 'mongoengine.django.sessions' supports mongodb TTL.

Note

SESSION_SERIALIZER is only necessary in Django>1.6 as the default serializer is based around JSON and doesn't know how to convert bson.objectid.ObjectId instances to strings.

How to run example app

uv sync --group dev
uv pip install -r example/tumblelog/requirements.txt
uv run python example/tumblelog/manage.py runserver

How to run tests

uv run python -m pytest