vincit/objection.js

★ 7,345JavaScriptAudience · developerComplexity · 2/5Setup · moderate

Mindmap

mindmap
  root((objection.js))
    What it does
      SQL query builder
      Relational mapping
      JSON schema validation
    Tech Stack
      Node.js
      JavaScript
      TypeScript
      knex
    Databases
      SQLite
      PostgreSQL
      MySQL
    Use Cases
      Fetch related records
      Run transactions
      Validate data
    Audience
      Backend developers
      API builders

mindmap root((objection.js)) What it does SQL query builder Relational mapping JSON schema validation Tech Stack Node.js JavaScript TypeScript knex Databases SQLite PostgreSQL MySQL Use Cases Fetch related records Run transactions Validate data Audience Backend developers API builders

Click or tap to explore — scroll the page freely

Things people build with this

USE CASE 1

Build a REST API that reads and writes data to a PostgreSQL or MySQL database without writing raw SQL strings.

USE CASE 2

Fetch related records across multiple database tables in a single JavaScript query with nested data support.

USE CASE 3

Validate data against a JSON schema before inserting it into the database.

Tech stack

JavaScriptNode.jsTypeScriptSQLitePostgreSQLMySQLknex

Getting it running

Difficulty · moderate Time to first run · 30min

Requires a running SQL database (SQLite, Postgres, or MySQL) and knex configured as a peer dependency.

The explanation does not mention the license.

In plain English

Objection.js is a library for Node.js that makes it easier to work with SQL databases. Node.js is a JavaScript runtime used to build server-side applications, and SQL is the language most relational databases use to store and retrieve data. Objection.js sits between your application code and your database, letting you write queries in JavaScript rather than raw SQL strings, while still giving you full access to the underlying SQL if you need it. The library describes itself less as a traditional ORM and more as a relational query builder. An ORM, or object-relational mapper, typically tries to hide the database behind an object-oriented layer. Objection takes a different approach: it keeps SQL visible and central, but gives you tools to make common operations like fetching related records, inserting nested data, and running transactions feel straightforward. You define your data models and describe how they relate to each other, and the library handles building the correct SQL queries. It supports SQLite, Postgres, and MySQL, all of which are thoroughly tested. It includes TypeScript support, optional JSON schema validation for validating data before it reaches the database, and the ability to store complex nested documents as a single database row. What the library deliberately does not include is automatic schema creation from model definitions, a custom query language that replaces SQL, or a fully object-oriented abstraction over every database concept. The README is candid that those approaches add complexity without proportional benefit. For database migrations, the project recommends using a separate tool called knex, which Objection.js is built on top of. The best starting point, according to the documentation, is to clone one of the provided example projects and experiment from there.

Copy-paste prompts

Prompt 1

I'm using objection.js with PostgreSQL. Show me how to define two models with a one-to-many relationship and fetch a user with all their posts in one query.

Prompt 2

How do I run a transaction in objection.js that inserts a parent record and multiple child records, rolling back everything if any insert fails?

Prompt 3

Show me how to add JSON schema validation to an objection.js model so invalid data is rejected before hitting the database.

Prompt 4

I'm using objection.js and want to build a paginated API endpoint that returns 20 results per page sorted by created_at. Show me the query.

Open on GitHub → Explain another repo

← vincit on gitmyhub — every repo by this author, as a profile.

Verify against the repo before relying on details.