14.9. A Matrix example

This example is creating a graph of the characters in the Matrix via the shell and then executing Cypher queries against it:

shell-matrix.svg

Neo4j is configured for autoindexing in this case with

  node_auto_indexing=true
  node_keys_indexable=name,age

  relationship_auto_indexing=true
  relationship_keys_indexable=ROOT,KNOWS,CODED_BY

in the neo4j configuration file.

The following is a sample shell session creating the Matrix graph and querying it.

 # create the Thomas Andersson node
 neo4j-sh (0)$ mkrel -t ROOT -c -v
 Node (1) created
 Relationship [ROOT,0] created


 # go to the new node
 neo4j-sh (0)$ cd 1

 # set the name property
 neo4j-sh (1)$ set name "Thomas Andersson"

 # create Thomas direct friends
 neo4j-sh (Thomas Andersson,1)$ mkrel -t KNOWS -cv
 Node (2) created
 Relationship [KNOWS,1] created


 # go to the new node
 neo4j-sh (Thomas Andersson,1)$ cd 2

 # set the name property
 neo4j-sh (2)$ set name "Trinity"

 # go back in the history stack
 neo4j-sh (Trinity,2)$ cd ..

 # create Thomas direct friends
 neo4j-sh (Thomas Andersson,1)$ mkrel -t KNOWS -cv
 Node (3) created
 Relationship [KNOWS,2] created


 # go to the new node
 neo4j-sh (Thomas Andersson,1)$ cd 3

 # set the name property
 neo4j-sh (3)$ set name "Morpheus"

 # create relationship to Trinity
 neo4j-sh (Morpheus,3)$ mkrel -t KNOWS -n 2

 # list the relationships of node 3
 neo4j-sh (Morpheus,3)$ ls -rv
 (me) --[KNOWS,3]-> (Trinity,2)
 (me) <-[KNOWS,2]-- (Thomas Andersson,1)


 # change the current position to relationship #2
 neo4j-sh (Morpheus,3)$ cd -r 2

 # set the age property on the relationship
 neo4j-sh [KNOWS,2]$ set -t int age 3

 # back to Morpheus
 neo4j-sh [KNOWS,2]$ cd ..

 # next relationsip
 neo4j-sh (Morpheus,3)$ cd -r 3

 # set the age property on the relationship
 neo4j-sh [KNOWS,3]$ set -t int age 90

 # position to the start node of the current relationship
 neo4j-sh [KNOWS,3]$ cd start

 # new node
 neo4j-sh (Morpheus,3)$ mkrel -t KNOWS -c

 # list relationships on the current node
 neo4j-sh (Morpheus,3)$ ls -r
 (me) --[KNOWS]-> (Trinity,2)
 (me) --[KNOWS]-> (4)
 (me) <-[KNOWS]-- (Thomas Andersson,1)


 # go to Cypher
 neo4j-sh (Morpheus,3)$ cd 4

 # set the name
 neo4j-sh (4)$ set name Cypher

 # create new node from Cypher
 neo4j-sh (Cypher,4)$ mkrel -ct KNOWS

 # list relationships
 neo4j-sh (Cypher,4)$ ls -r
 (me) --[KNOWS]-> (5)
 (me) <-[KNOWS]-- (Morpheus,3)


 # go to the Agent Smith node
 neo4j-sh (Cypher,4)$ cd 5

 # set the name
 neo4j-sh (5)$ set name "Agent Smith"

 # outgoing relationship and new node
 neo4j-sh (Agent Smith,5)$ mkrel -cvt CODED_BY
 Node (6) created
 Relationship [CODED_BY,6] created


 # go there
 neo4j-sh (Agent Smith,5)$ cd 6

 # set the name
 neo4j-sh (6)$ set name "The Architect"

 # go to the first node in the history stack
 neo4j-sh (The Architect,6)$ cd

 # Morpheus' friends, looking up Morpheus by name in the Neo4j autoindex
 neo4j-sh (0)$ start morpheus = (node_auto_index, name, 'Morpheus') match morpheus-[:KNOWS]-zionist return zionist.name
 +------------------+
 | zionist.name     |
 +------------------+
 | Trinity          |
 | Cypher           |
 | Thomas Andersson |
 +------------------+
 3 rows, 28 ms