Max De Marzi

In the Neo4j Property Graph model, every single Relationship must be Typed and Directed. This means they must have a specific name (FRIENDS, LIKES, FOLLOWS, etc) and have a Start Node and an End Node to show direction. What’s neat is that when you write your queries you can choose to ignore that. The following queries are all valid:

// Get all the people I follow 
MATCH (u1:Person)-[:FOLLOWS]->(u2:Person)
WHERE u1.username = "maxdemarzi"
RETURN u2.username

// Get all the people that I follow or follow me
MATCH (u1:Person)-[:FOLLOWS]-(u2:Person)
WHERE u1.username = "maxdemarzi"
RETURN u2.username

// Get all the people related to me 
MATCH (u1:Person)--(u2:Person)
WHERE u1.username = "maxdemarzi"
RETURN u2.username

Continue reading →