README

This is just an experiment about using Rails + Neo4j + d3.js

Clone the repo

bundle install

bin/rake db:migrate

bin/rake neo4j:migrate

bin/rails s

neo4j.rb rake tasks

neo4j.rb comes with its own collection of rake tasks. Good think is that they are "self-documented". For example if you create a new neo4j model and then you try to use it, you may see an error like:

---

Neo4j::DeprecatedSchemaDefinitionError:           Some schema elements were defined by the model (which is no longer supported), but they do not exist in the database.  Run the following to create them:

rake neo4j:generate_schema_migration[constraint,Actor,uuid]


And then run `rake neo4j:migrate`

---

and that is exactly what you have to do.

rake neo4j:generate

will create neo4j migration files in:

db/neo4j

Running

rake neo4j:migrate

the migration will be exectuted directly on the neo4j database

Example queries

MATCH (a:Actor)-[:ACTS_IN]-(m:Movie) WHERE a.name = "Tom Hanks" RETURN a, m LIMIT 25

MATCH (a:Actor)-[:ACTS_IN]-(m:Movie), (a:Actor)-[:DIRECTED]-(m:Movie) WHERE a.name = "Tom Hanks" RETURN a, m LIMIT 25

MATCH (a:Actor)-[:ACTS_IN]-(m:Movie), (a:Actor)-[:DIRECTED]-(m:Movie) WHERE a.name = "Woody Allen" RETURN a, m LIMIT 25

MATCH (a:Director)-[:DIRECTED]-(m:Movie), (b:Actor)-[:ACTS_IN]-(m:Movie) WHERE a.name = "Woody Allen" AND b.name = "Mia Farrow" RETURN a, b, m LIMIT 25

MATCH p=shortestPath( (bacon:Person {name:"Kevin Bacon"})-[*]-(meg:Person {name:"Meg Ryan"}) ) RETURN p

MATCH (bacon:Person {name:"Kevin Bacon"})-[*1..3]-(hollywood) RETURN DISTINCT hollywood