Prisma Supabase Generator

A Prisma generator that creates types for the @supabase/supabase-js or @supabase/postgrest-js client without the need for an online or dockerized database, resulting in faster generation times. This is particularly useful for projects that only use PostgREST.

Demonstration

Installation

To use this generator, add it to your Prisma project. First, install the package:

NPM

npm i -D prisma-supabase

Yarn

yarn add -D prisma-supabase

PNPM

pnpm add -D prisma-supabase

Deno 2.x

deno add -D prisma-supabase

Bun

bun add -D prisma-supabase

Usage

1. Add the generator to your schema.prisma file:

generator supabase {
  provider = "prisma-supabase"
  output   = "./database.ts" // Optional: Defaults to ./database.ts which would store in ./prisma/database.ts
  enableDocumentation = true // Optional: Defaults to true
}

2. Run Prisma generate to create the Supabase types:

npx prisma generate

This will generate a database.ts file (or whatever you specified in the output option) in your Prisma output directory (usually prisma/).

Configuration Options

• output: Specifies the output file for the generated types. Defaults to ./prisma/database.ts.
• enableDocumentation: Enables or disables the generation of JSDoc comments from Prisma schema comments. Defaults to true.

Example Usage

Here's an example of how to use the generated types with Supabase:

import { createClient } from "@supabase/supabase-js";
import { type Database } from "./prisma/database";

// Supabase Example
const supabase = createClient<Database>('', '');

supabase.from('User').select('*').limit(1).single().then((res) => {
  console.log(res.data?.id);
});

supabase.from('User').select('*, Post(*)').limit(1).single().then((res) => {
  console.log(res.data?.Post[0].content);
});

Or using PostgREST:

import { PostgrestClient } from "@supabase/postgrest-js";
import { type Database } from "./prisma/database";

// PostgREST Example
const postgrest = new PostgrestClient<Database>('');

postgrest.from('User').select('*').limit(1).single().then((res) => {
  console.log(res.data?.id);
});

postgrest.from('User').select('*, Post(*)').limit(1).single().then((res) => {
  console.log(res.data?.Post[0].content);
});

In these examples, the Database type is imported from the generated database.ts file, providing type safety for your Supabase or PostgREST queries based on your Prisma schema.

Example Output

Schema: example/prisma/schema.prisma

Output: example/prisma/database.ts

Features

• [x] Table Types
• [x] Table Relationships
• [x] Enum Types
• [x] JSDoc from Prisma schema comments
• [x] View Types (included within Table Types)
• [ ] Multiple Schemas (in progress)
• [ ] Composite Types (not supported by Prisma yet)
• [ ] Function Types (not supported by Prisma yet)

Benefits

• Generate Supabase types from your Prisma schema without an online or dockerized database
• Useful for projects that only use PostgREST
• Faster type generation process
• Optional JSDoc comments for better code documentation

Requirements

• Prisma 2.x or higher

Contributing

Contributions are welcome! Please feel free to submit a Pull Request or open an Issue.

License

This project is licensed under the MIT License.