An Object Graph Mapper (OGM) for the neo4j graph database, built on the awesome neo4j_driver
If you need assistance with neomodel, please create an issue on the GitHub repo found at https://github.com/neo4j-contrib/neomodel/.
- Familiar class based model definitions with proper inheritance.
- Powerful query API.
- Schema enforcement through cardinality restrictions.
- Full transaction support.
- Thread safe.
- Pre/post save/delete hooks.
- Django integration via django_neomodel
Maintenance notice
This project did not receive releases between December 2021 and early 2023. Active maintenance of the project is now being picked up again. Please look at the Issues page, and especially this thread for more information about the current plan : #653
Please note:
This repository now tracks release 5.0 of neomodel that works with Neo4j 5.x and Neo4j 4.4.
The last neomodel 4.x release was neomodel 4.0.10.
Requirements
For neomodel releases 5.x :
- Python 3.7+
- Neo4j 5.x, 4.4 (LTS)
For neomodel releases 4.x :
- Python 3.7 -> 3.10
- Neo4j 4.x (including 4.4 LTS for neomodel version 4.0.10)
Documentation
(Needs an update, but) Available on readthedocs.
Installation
Install from pypi (recommended):
$ pip install neomodel ($ source dev # To install all things needed in a Python3 venv) Neomodel has some optional dependencies (including Shapely), to install these use: $ pip install neomodel['extras']
To install from github:
$ pip install git+git://github.com/neo4j-contrib/neomodel.git@HEAD#egg=neomodel-dev
Contributing
Ideas, bugs, tests and pull requests always welcome. Please use GitHub's Issues page to track these.
If you are interested in developing neomodel further, pick a subject from the Issues page and open a Pull Request (PR) for
it. If you are adding a feature that is not captured in that list yet, consider if the work for it could also
contribute towards delivering any of the existing issues too.
Running the test suite
Make sure you have a Neo4j database version 4 or higher to run the tests on.:
$ export NEO4J_BOLT_URL=bolt://<username>:<password>@localhost:7687 # check your username and password
Ensure dbms.security.auth_enabled=true in your database configuration file.
Setup a virtual environment, install neomodel for development and run the test suite:
$ pip install -e '.[dev]' $ pytest
The tests in "test_connection.py" will fail locally if you don't specify the following environment variables:
$ export AURA_TEST_DB_USER=username $ export AURA_TEST_DB_PASSWORD=password $ export AURA_TEST_DB_HOSTNAME=url
If you are running a neo4j database for the first time the test suite will set the password to 'test'.
If the database is already populated, the test suite will abort with an error message and ask you to re-run it with the
--resetdb switch. This is a safeguard to ensure that the test suite does not accidentally wipe out a database if you happen
to not have restarted your Neo4j server to point to a (usually named) debug.db database.
If you have docker-compose installed, you can run the test suite against all supported Python
interpreters and neo4j versions:
# in the project's root folder: $ sh ./tests-with-docker-compose.sh