Graph Database.
Zero Complexity.

import { LeanGraph } from 'leangraph';

// Initialize - works in dev & production
const db = await LeanGraph({
  project: 'social-network',
});

// Create a social graph
await db.execute(`
  CREATE (alice:User {name: 'Alice'})
    -[:FOLLOWS]->
  (bob:User {name: 'Bob'})
    -[:FOLLOWS]->
  (charlie:User {name: 'Charlie'})
`);

// Query with Cypher
const users = await db.query(`
  MATCH (u:User)-[:FOLLOWS*1..2]->(f:User)
  WHERE u.name = 'Alice'
  RETURN DISTINCT f.name AS friend
`);

console.log(users);
// [{ friend: 'Bob' }, { friend: 'Charlie' }]

-- Create nodes and relationships
CREATE (n:Person {name: 'Alice'})

-- Pattern matching
MATCH (a:Person)-[:KNOWS]->(b:Person)
WHERE a.age > 21
RETURN b.name

-- Variable-length paths
MATCH (a)-[:FOLLOWS*1..3]->(b)
RETURN DISTINCT b

-- Aggregation
MATCH (u:User)-[:POSTED]->(p:Post)
RETURN u.name, count(p) AS posts
ORDER BY posts DESC

-- Merge (upsert)
MERGE (u:User {email: $email})
ON CREATE SET u.created = timestamp()
ON MATCH SET u.lastSeen = timestamp()

-- Database introspection
CALL db.labels() YIELD label
RETURN label