activegraph

https://github.com/neo4jrb/activegraph

Ruby

An active model wrapper for the Neo4j Graph Database for Ruby.

Neo4j::ActiveRel::Persistence::QueryFactory#node_before_callbacks!

Node callbacks only need to be executed if the node is not persisted. We let the `conditional_callback` method do the work,
  we only have to give it the type of callback we expect to be run and the condition which, if true, will prevent it from executing.

Source | Google | Stack overflow

Edit

git clone [email protected]:neo4jrb/activegraph.git
cd activegraph
open

Contribute

# Make a new branch

git checkout -b -your-name--update-docs-Neo4j--ActiveRel--Persistence--QueryFactory-node_before_callbacks--for-pr

# Commit to git

git add git commit -m "better docs for Neo4j::ActiveRel::Persistence::QueryFactory#node_before_callbacks!"

# Open pull request

gem install hub # on a mac you can `brew install hub`

hub fork

git push <your name> -your-name--update-docs-Neo4j--ActiveRel--Persistence--QueryFactory-node_before_callbacks--for-pr

hub pull-request

# Celebrate!