Ladybug Node.js API

A high-performance graph database for knowledge-intensive applications. This Node.js wrapper enables interaction with the Ladybug database via JavaScript or TypeScript using either CommonJS or ES Modules.

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📦 Installation

npm install lbug

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🚀 Quick Start

Example (ES Modules)

// Import the Ladybug module (ESM)
import { Database, Connection } from "lbug";

const main = async () => {
  // Initialize database and connection
  const db = new Database("./test");
  const conn = new Connection(db);

  // Define schema
  await conn.query(`
    CREATE NODE TABLE User(name STRING, age INT64, PRIMARY KEY (name));
  `);
  await conn.query(`
    CREATE NODE TABLE City(name STRING, population INT64, PRIMARY KEY (name));
  `);
  await conn.query(`
    CREATE REL TABLE Follows(FROM User TO User, since INT64);
  `);
  await conn.query(`
    CREATE REL TABLE LivesIn(FROM User TO City);
  `);

  // Load data from CSV files
  await conn.query(`COPY User FROM "user.csv"`);
  await conn.query(`COPY City FROM "city.csv"`);
  await conn.query(`COPY Follows FROM "follows.csv"`);
  await conn.query(`COPY LivesIn FROM "lives-in.csv"`);

  // Run a query
  const result = await conn.query("MATCH (u:User) RETURN u.name, u.age;");

  // Fetch all results
  const rows = await result.getAll();

  // Output results
  for (const row of rows) {
    console.log(row);
  }
};

main().catch(console.error);

✅ The dataset used in this example can be found in the official Ladybug repository.

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📚 API Overview

The lbug package exposes the following primary classes:

• Database – Initializes a database from a file path.
• Connection – Executes queries on a connected database.
• QueryResult – Provides methods like getAll() to retrieve results.

Both CommonJS (require) and ES Modules (import) are fully supported.

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🛠️ Local Development (for Contributors)

Install Dev Dependencies

npm install --include=dev

Build Project

npm run build

Run Tests

npm test

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📦 Packaging and Binary Distribution

We bundle all prebuilt binaries directly into the npm package, inspired by the approach used by prebuildify.

All prebuilt binaries are shipped inside the package that is published to npm, which means there's no need for a separate download step like you find in prebuild. The irony of this approach is that it is faster to download all prebuilt binaries for every platform when they are bundled than it is to download a single prebuilt binary as an install script.

Requirements (for building from source)

If a prebuilt binary is unavailable for your platform, the module will be built from source during installation. Ensure the following tools are installed:

• CMake (≥ 3.15)
• Python 3
• A C++20-compatible compiler

Packaging Prebuilt Binaries

1. Place your binaries inside the prebuilt directory.

2. Name them using the format:

   lbugjs-${platform}-${arch}.node
   

3. Run the packaging script:

node package

If no binaries are found, a source-only tarball will be generated.

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🚀 Publishing

To publish the package to npm:

npm publish

Refer to the npm documentation for full details on publishing and versioning.

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🔗 Resources

• Ladybug GitHub
• Ladybug Documentation
• Issue Tracker