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require 'rubygems'
require 'neography'
@neo = Neography::Rest.new
def create_node(name, mysql_id)
@neo.create_node("name" => name, "mysql_id" => mysql_id)
end
def attended(student, school, degree, graduated)
@neo.create_relationship("attended", student, school, {"degree" => degree, "graduated" => graduated})
end
def graduated_with_me(student)
student = student["self"].split('/').last
student_attended = @neo.get_node_relationships(student)[0]
graduated = student_attended["data"]["graduated"]
school = student_attended["end"].split('/').last
@neo.traverse(school,"nodes", {"order" => "breadth first",
"uniqueness" => "node global",
"relationships" => {"type"=> "attended", "direction" => "in"},
"return filter" => {
"language" => "javascript",
"body" => "position.length() == 1
&& position.endNode().getId() != #{student}
&& position.lastRelationship().getProperty(\"graduated\") == #{graduated};"}})
end
charlie = create_node("Charlie", 1)
max = create_node("Max", 2)
peter = create_node("Peter", 3)
carol = create_node("Carol", 3)
tom = create_node("Tom", 4)
jerry = create_node("Jerry", 5)
larry = create_node("Larry", 6)
yale = create_node("Yale", 7)
harvard = create_node("Harvard", 8)
rutgers = create_node("Rutgers", 9)
attended(charlie,yale,"engineering", 2010)
attended(max,yale,"mathematics", 2005)
attended(peter,yale,"biology", 2010)
attended(carol,yale,"engineering", 2010)
attended(tom,harvard,"biology", 2008)
attended(jerry,rutgers,"physics", 2007)
attended(larry,rutgers,"mathematics", 2010)
puts "Charlie graduated with #{graduated_with_me(charlie).map{|n| n["data"]["name"]}.join(', ')}"
# The node levels returned are Peter, Carol