Neo4j Data Import Example

neo4j_client.rb

require 'rest-client'
require 'json'

module Neo4jClient
  SERVER = 'http://neo4j:neo4j@localhost:7474'
  
  def self.cypher query, params = {}
    resp = RestClient.post("#{SERVER}/db/data/cypher", {query: query, params: params}.to_json, content_type: :json, accept: :json)
    JSON.parse resp
  end
end

neo4j_client_example.rb

# IMPORT USERS AS NODES
User.find_each do |u|
  Neo4jClient.cypher "CREATE (:User {props})", props: {id: u.id, name: u.name, email: u.email}
end

# IMPORT FOLLOWINGS AS RELATIONSHIPS
Follow.find_each do |f|
  query = "MATCH (follower:User {id: {follower_id}}) MATCH (followee:User {id: {followee_id}}) CREATE (follower)-[:FOLLOWS {id: {id}}]->(followee)"
  Neo4jClient.cypher query, id: f.id, follower_id: f.follower_id, followee_id: f.followee_id
end

# RUN A QUERY
resp = Neo4jClient.cypher("MATCH (:User {id: 1})-[:FOLLOWS]->(u:User) RETURN u")

resp['data'].each do |r| 
  puts r.first['data']
end

https://neo4j.com/docs/developer-manual/current/