{"id":16406,"library":"jugglingdb","title":"JugglingDB ORM","description":"JugglingDB is a JavaScript cross-database ORM designed for Node.js, offering a common interface to interact with various popular relational and NoSQL databases such as MySQL, PostgreSQL, MongoDB, Redis, SQLite, CouchDB, and Neo4j, along with an in-memory storage option. It also supported client-side usage via WebService and Memory adapters, enabling rich client-side applications to communicate with server-side JSON APIs. The npm package shows version 2.0.1 as the latest. However, active development on JugglingDB ceased around 2017-2018, as its core concepts and codebase were forked to create `loopback-datasource-juggler`, which continues to be actively maintained as part of the LoopBack framework. Consequently, JugglingDB itself is no longer maintained and does not receive updates or security patches. Its release cadence is non-existent, and it is not compatible with modern Node.js environments.","status":"abandoned","version":"2.0.1","language":"javascript","source_language":"en","source_url":"https://github.com/1602/jugglingdb","tags":["javascript"],"install":[{"cmd":"npm install jugglingdb","lang":"bash","label":"npm"},{"cmd":"yarn add jugglingdb","lang":"bash","label":"yarn"},{"cmd":"pnpm add jugglingdb","lang":"bash","label":"pnpm"}],"dependencies":[{"reason":"JugglingDB requires a specific database adapter package (e.g., jugglingdb-mongodb, jugglingdb-redis-hq, jugglingdb-mysql) for connecting to a database. The core package only provides the ORM logic.","package":"jugglingdb-ADAPTERNAME","optional":false}],"imports":[{"note":"JugglingDB was developed for older Node.js environments and primarily uses CommonJS `require()` syntax. It does not natively support ES Modules (`import`/`export`).","wrong":"import { Schema } from 'jugglingdb';","symbol":"Schema","correct":"const Schema = require('jugglingdb').Schema;"},{"note":"Models are defined dynamically through a `Schema` instance, not directly imported as named exports from the `jugglingdb` package.","wrong":"const { Post } = require('jugglingdb');","symbol":"Post","correct":"const Post = schema.define('Post', { /* ... */ });"}],"quickstart":{"code":"const Schema = require('jugglingdb').Schema;\n\n// Use the in-memory adapter for a quick, no-install example\nconst schema = new Schema('memory', { debug: true });\n\nconst User = schema.define('User', {\n  name: { type: String, limit: 50, index: true },\n  email: { type: String, unique: true },\n  age: { type: Number, default: 18 },\n  createdAt: { type: Date, default: Date.now }\n});\n\nasync function runExample() {\n  try {\n    // Auto-migrate the schema (create tables/collections if they don't exist)\n    await schema.autoupdate(); \n    console.log('Schema autoupdated.');\n\n    // Create a new user\n    const newUser = await User.create({ name: 'Alice', email: 'alice@example.com', age: 30 });\n    console.log('Created user:', newUser.toJSON());\n\n    // Find a user by ID\n    const foundUser = await User.findById(newUser.id);\n    console.log('Found user by ID:', foundUser.toJSON());\n\n    // Update a user\n    await foundUser.updateAttributes({ age: 31 });\n    console.log('Updated user:', foundUser.toJSON());\n\n    // Find all users\n    const allUsers = await User.all();\n    console.log('All users:', allUsers.map(u => u.toJSON()));\n\n    // Delete a user\n    await foundUser.destroy();\n    console.log('User deleted.');\n\n    const remainingUsers = await User.count();\n    console.log('Remaining users:', remainingUsers);\n\n  } catch (err) {\n    console.error('An error occurred:', err);\n  } finally {\n    // In a real application, you'd disconnect from the database here.\n    // For 'memory' adapter, no explicit disconnect is usually needed.\n    console.log('Example finished.');\n  }\n}\n\nrunExample();","lang":"javascript","description":"This quickstart demonstrates defining a schema with the in-memory adapter, creating a model, and performing basic CRUD operations (create, find, update, delete) using async/await."},"warnings":[{"fix":"Migrate to `loopback-datasource-juggler` or another actively maintained ORM/ODM like Sequelize, TypeORM, or Mongoose. `loopback-datasource-juggler` is the direct successor and maintains a similar API.","message":"The `jugglingdb` package is officially abandoned and no longer maintained. Its development activity effectively ceased around 2017-2018. This means it receives no new features, bug fixes, or security updates. Using it in production environments is highly discouraged due to potential vulnerabilities and compatibility issues with modern Node.js versions.","severity":"breaking","affected_versions":">=2.0.1"},{"fix":"Stick to CommonJS `require()` syntax if you must use JugglingDB. For new projects, prefer modern ORMs with full ESM and TypeScript support.","message":"JugglingDB was built for older Node.js versions (e.g., node >= 0.6) and is primarily CommonJS-based (`require`). It does not natively support ES Modules (`import`/`export`) and may have significant compatibility issues or require complex transpilation to run in modern Node.js or browser environments.","severity":"gotcha","affected_versions":">=2.0.1"},{"fix":"Consider `loopback-datasource-juggler` which is actively maintained and provides TypeScript definitions. Alternatively, use a modern ORM built for TypeScript.","message":"JugglingDB does not ship with built-in TypeScript definitions, nor is it designed with TypeScript in mind. Using it in a TypeScript project will require manual type declarations or extensive `@ts-ignore` usage.","severity":"gotcha","affected_versions":">=2.0.1"},{"fix":"Ensure you install the correct adapter (`npm install jugglingdb-ADAPTERNAME`). However, even with the correct adapter, compatibility with modern database versions is not guaranteed.","message":"The `jugglingdb` core package requires a separate adapter package (e.g., `jugglingdb-mongodb`, `jugglingdb-mysql`) to connect to a specific database. Many of these adapter packages are also abandoned and may not work with current database server versions or their native drivers.","severity":"breaking","affected_versions":">=2.0.1"}],"env_vars":null,"last_verified":"2026-04-22T00:00:00.000Z","next_check":"2026-07-21T00:00:00.000Z","problems":[{"fix":"Correct the import and instantiation to `const Schema = require('jugglingdb').Schema;` and then `const schema = new Schema('memory');`.","cause":"Attempting to instantiate `jugglingdb` directly as a constructor (e.g., `new jugglingdb.Schema()`) instead of accessing its `Schema` property.","error":"TypeError: Schema is not a constructor"},{"fix":"Run `npm install jugglingdb-myadapter` (replace 'myadapter' with your actual adapter name) in your project directory. For custom adapters, ensure the path provided to `new Schema()` is correct and the module exports an adapter conforming to the JugglingDB API.","cause":"The specified database adapter (e.g., `jugglingdb-myadapter`) has not been installed via npm, or the path to a custom adapter is incorrect.","error":"Error: Adapter 'myadapter' is not installed or cannot be found."},{"fix":"This is an indicator of deep-seated dependency incompatibility within an abandoned ecosystem. There is no simple fix other than to avoid this legacy version combination. If encountering this, it's a strong signal to migrate away from JugglingDB entirely.","cause":"This specific error often occurred in older `jugglingdb-mysql` adapter versions (e.g., 0.0.1-6) when an incompatible version of the `jugglingdb` core was installed or there was a dependency resolution issue.","error":"jdb.BaseSQL undefined"}],"ecosystem":"npm"}