zenstack

<div align="center"> <a href="https://zenstack.dev"> <picture> <source media="(prefers-color-scheme: dark)" srcset="https://raw.githubusercontent.com/zenstackhq/zenstack-docs/main/static/img/logo-dark.png"> <img src="https://raw.githubusercontent.com/zenstackhq/zenstack-docs/main/static/img/logo.png" height="128"> </picture> </a> <h1>ZenStack</h1> <a href="https://www.npmjs.com/package/zenstack"> <img src="https://img.shields.io/npm/v/zenstack"> </a> <a href="https://www.npmjs.com/package/zenstack"> <img src="https://img.shields.io/npm/dm/zenstack"> </a> <img src="https://github.com/zenstackhq/zenstack/actions/workflows/build-test.yml/badge.svg"> <a href="https://twitter.com/zenstackhq"> <img src="https://img.shields.io/twitter/url?style=social&url=https%3A%2F%2Fgithub.com%2Fzenstackhq%2Fzenstack"> </a> <a href="https://discord.gg/Ykhr738dUe"> <img src="https://img.shields.io/discord/1035538056146595961"> </a> <a href="https://github.com/zenstackhq/zenstack/blob/main/LICENSE"> <img src="https://img.shields.io/badge/license-MIT-green"> </a> </div>

What it is

ZenStack is a Node.js/TypeScript toolkit that simplifies the development of a web app's backend. It enhances Prisma ORM with a flexible Authorization layer and auto-generated, type-safe APIs/hooks, unlocking its full potential for full-stack development.

Our goal is to let you save time writing boilerplate code and focus on building real features!

How it works

Read full documentation at 👉🏻 zenstack.dev. Join Discord for feedback and questions.

ZenStack incrementally extends Prisma's power with the following four layers:

1. ZModel - an extended Prisma schema language

ZenStack introduces a data modeling language called "ZModel" - a superset of Prisma schema language. It extended Prisma schema with custom attributes and functions and, based on that, implemented a flexible access control layer around Prisma.

// base.zmodel
abstract model Base {
    id String @id
    author User @relation(fields: [authorId], references: [id])
    authorId String

    // 🔐 allow full CRUD by author
    @@allow('all', author == auth())
}

// schema.zmodel
import "base"
model Post extends Base {
    title String
    published Boolean @default(false)

    // 🔐 allow logged-in users to read published posts
    @@allow('read', auth() != null && published)
}

The zenstack CLI transpiles the ZModel into a standard Prisma schema, which you can use with the regular Prisma workflows.

2. Runtime enhancements to Prisma client

At runtime, transparent proxies are created around Prisma clients for intercepting queries and mutations to enforce access policies.

import { enhance } from '@zenstackhq/runtime';

// a regular Prisma client
const prisma = new PrismaClient();

async function getPosts(userId: string) {
    // create an enhanced Prisma client that has access control enabled
    const enhanced = enhance(prisma, { user: userId });

    // only posts that're visible to the user will be returned
    return enhanced.post.findMany();
}

3. Automatic RESTful APIs through server adapters

Server adapter packages help you wrap an access-control-enabled Prisma client into backend CRUD APIs that can be safely called from the frontend. Here's an example for Next.js:

// pages/api/model/[...path].ts

import { requestHandler } from '@zenstackhq/next';
import { enhance } from '@zenstackhq/runtime';
import { getSessionUser } from '@lib/auth';
import { prisma } from '@lib/db';

// Mount Prisma-style APIs: "/api/model/post/findMany", "/api/model/post/create", etc.
// Can be configured to provide standard RESTful APIs (using JSON:API) instead.
export default requestHandler({
    getPrisma: (req, res) => enhance(prisma, { user: getSessionUser(req, res) }),
});

4. Generated client libraries (hooks) for data access

Plugins can generate strong-typed client libraries that talk to the aforementioned APIs. Here's an example for React:

// components/MyPosts.tsx

import { useFindManyPost } from '@lib/hooks';

const MyPosts = () => {
    // list all posts that're visible to the current user, together with their authors
    const { data: posts } = useFindManyPost({
        include: { author: true },
        orderBy: { createdAt: 'desc' },
    });

    return (
        <ul>
            {posts?.map((post) => (
                <li key={post.id}>
                    {post.title} by {post.author.name}
                </li>
            ))}
        </ul>
    );
};

Architecture

The following diagram gives a high-level architecture overview of ZenStack.

Architecture

Features

Access control and data validation rules right inside your Prisma schema
Auto-generated OpenAPI (RESTful) specifications, services, and client libraries
End-to-end type safety
Extensible: custom attributes, functions, and a plugin system
A framework-agnostic core with framework-specific adapters
Uncompromised performance

Plugins

Prisma schema generator
Zod schema generator
SWR and TanStack Query hooks generator
OpenAPI specification generator
tRPC router generator
🙋🏻 Request for a plugin

Framework adapters

Next.js (including support for the new "app directory" in Next.js 13)
Nuxt
SvelteKit
Fastify
ExpressJS
NestJS
🙋🏻 Request for an adapter

Prisma schema extensions

Examples

Schema Samples

The sample repo includes the following patterns:

ACL
RBAC
ABAC
Multi-Tenancy

You can use this blog post as an introduction.

Multi-Tenant Todo App

Check out the Multi-tenant Todo App for a running example. You can find different implementations below:

Blog App

Community

Join our discord server for chat and updates!

Contributing

If you like ZenStack, join us to make it a better tool! Please use the Contributing Guide for details on how to get started, and don't hesitate to join Discord to share your thoughts.

Please also consider sponsoring our work to speed up the development. Your contribution will be 100% used as a bounty reward to encourage community members to help fix bugs, add features, and improve documentation.