Neo4j Schema Introspection

Usage

import neo4j, { session } from "neo4j-driver";
import { model } from "@neo4j/graph-schema-utils";
import { introspect, sessionFactory } from "@neo4j/graph-introspection";

async function main() {
  const driver = neo4j.driver(
    "neo4j://localhost:7687",
    neo4j.auth.basic("neo4j", "password")
  );

  // We want a session factory here so we can work in multiple sessions
  const graphSchema = await introspect(sessionFactory(driver, session.READ));

  // Put it in the JSON representation wrapper
  // this is only required if the serialized representation is the end goal
  const wrappedSchema = new model.GraphSchemaRepresentation(
    "1.0.0",
    graphSchema
  );

  // outputs standard graph schema JSON representation
  console.log(wrappedSchema.toJson(2));

  await driver.close();
}

main();

Testing

Running npm run test:integration will create a new database named integration.tests and delete it after the tests finish.
This means you'd need Neo4j Enterprise to run the integration tests and put credentials in .env file.

To spin up a docker container for running tests, run this command:

docker run \
    --name testneo4j \
    --rm \
    -p7474:7474 -p7687:7687 \
    --env NEO4J_ACCEPT_LICENSE_AGREEMENT=eval \
    --env NEO4J_AUTH=neo4j/password \
    neo4j:enterprise