supabase-node

What this skill does

# Supabase + Node.js Skill


Express/Hono patterns with Supabase Auth and Drizzle ORM.

**Sources:** [Supabase JS Client](https://supabase.com/docs/reference/javascript/introduction) | [Drizzle ORM](https://orm.drizzle.team/)

---

## Core Principle

**Drizzle for queries, Supabase for auth/storage, middleware for validation.**

Use Drizzle ORM for type-safe database access. Use Supabase client for auth verification, storage, and realtime. Express or Hono for the API layer.

---

## Project Structure

```
project/
├── src/
│   ├── routes/
│   │   ├── index.ts             # Route aggregator
│   │   ├── auth.ts
│   │   ├── posts.ts
│   │   └── users.ts
│   ├── middleware/
│   │   ├── auth.ts              # JWT validation
│   │   ├── error.ts             # Error handler
│   │   └── validate.ts          # Request validation
│   ├── db/
│   │   ├── index.ts             # Drizzle client
│   │   ├── schema.ts            # Schema definitions
│   │   └── queries/             # Query functions
│   ├── lib/
│   │   ├── supabase.ts          # Supabase client
│   │   └── config.ts            # Environment config
│   ├── types/
│   │   └── express.d.ts         # Express type extensions
│   └── index.ts                 # App entry point
├── supabase/
│   ├── migrations/
│   └── config.toml
├── drizzle.config.ts
├── package.json
├── tsconfig.json
└── .env
```

---

## Setup

### Install Dependencies
```bash
npm install express cors helmet dotenv @supabase/supabase-js drizzle-orm postgres zod
npm install -D typescript @types/express @types/cors @types/node tsx drizzle-kit
```

### package.json Scripts
```json
{
  "scripts": {
    "dev": "tsx watch src/index.ts",
    "build": "tsc",
    "start": "node dist/index.js",
    "db:generate": "drizzle-kit generate",
    "db:push": "drizzle-kit push",
    "db:studio": "drizzle-kit studio"
  }
}
```

### Environment Variables
```bash
# .env
PORT=3000
NODE_ENV=development

# Supabase
SUPABASE_URL=http://localhost:54321
SUPABASE_ANON_KEY=<from supabase start>
SUPABASE_SERVICE_ROLE_KEY=<from supabase start>

# Database
DATABASE_URL=postgresql://postgres:postgres@localhost:54322/postgres
```

---

## Configuration

### src/lib/config.ts
```typescript
import { z } from 'zod';
import dotenv from 'dotenv';

dotenv.config();

const envSchema = z.object({
  PORT: z.string().default('3000'),
  NODE_ENV: z.enum(['development', 'production', 'test']).default('development'),
  SUPABASE_URL: z.string().url(),
  SUPABASE_ANON_KEY: z.string(),
  SUPABASE_SERVICE_ROLE_KEY: z.string(),
  DATABASE_URL: z.string(),
});

export const config = envSchema.parse(process.env);
```

---

## Database Setup

### drizzle.config.ts
```typescript
import { defineConfig } from 'drizzle-kit';
import { config } from './src/lib/config';

export default defineConfig({
  schema: './src/db/schema.ts',
  out: './supabase/migrations',
  dialect: 'postgresql',
  dbCredentials: {
    url: config.DATABASE_URL,
  },
  schemaFilter: ['public'],
});
```

### src/db/index.ts
```typescript
import { drizzle } from 'drizzle-orm/postgres-js';
import postgres from 'postgres';
import * as schema from './schema';
import { config } from '../lib/config';

const client = postgres(config.DATABASE_URL, {
  prepare: false, // Required for Supabase pooling
});

export const db = drizzle(client, { schema });
```

### src/db/schema.ts
```typescript
import {
  pgTable,
  uuid,
  text,
  timestamp,
  boolean,
} from 'drizzle-orm/pg-core';

export const profiles = pgTable('profiles', {
  id: uuid('id').primaryKey(),
  email: text('email').notNull(),
  name: text('name'),
  avatarUrl: text('avatar_url'),
  createdAt: timestamp('created_at').defaultNow().notNull(),
  updatedAt: timestamp('updated_at').defaultNow().notNull(),
});

export const posts = pgTable('posts', {
  id: uuid('id').primaryKey().defaultRandom(),
  authorId: uuid('author_id').references(() => profiles.id).notNull(),
  title: text('title').notNull(),
  content: text('content'),
  published: boolean('published').default(false),
  createdAt: timestamp('created_at').defaultNow().notNull(),
});

// Type exports
export type Profile = typeof profiles.$inferSelect;
export type NewProfile = typeof profiles.$inferInsert;
export type Post = typeof posts.$inferSelect;
export type NewPost = typeof posts.$inferInsert;
```

---

## Supabase Client

### src/lib/supabase.ts
```typescript
import { createClient, SupabaseClient, User } from '@supabase/supabase-js';
import { config } from './config';

// Client with anon key (respects RLS)
export const supabase = createClient(
  config.SUPABASE_URL,
  config.SUPABASE_ANON_KEY
);

// Admin client (bypasses RLS)
export const supabaseAdmin = createClient(
  config.SUPABASE_URL,
  config.SUPABASE_SERVICE_ROLE_KEY,
  {
    auth: {
      autoRefreshToken: false,
      persistSession: false,
    },
  }
);

// Verify JWT and get user
export async function verifyToken(token: string): Promise<User | null> {
  const { data: { user }, error } = await supabase.auth.getUser(token);

  if (error || !user) {
    return null;
  }

  return user;
}
```

---

## Type Extensions

### src/types/express.d.ts
```typescript
import { User } from '@supabase/supabase-js';

declare global {
  namespace Express {
    interface Request {
      user?: User;
    }
  }
}

export {};
```

---

## Middleware

### src/middleware/auth.ts
```typescript
import { Request, Response, NextFunction } from 'express';
import { verifyToken } from '../lib/supabase';

export async function requireAuth(
  req: Request,
  res: Response,
  next: NextFunction
) {
  const authHeader = req.headers.authorization;

  if (!authHeader?.startsWith('Bearer ')) {
    return res.status(401).json({ error: 'Missing authorization header' });
  }

  const token = authHeader.split(' ')[1];
  const user = await verifyToken(token);

  if (!user) {
    return res.status(401).json({ error: 'Invalid token' });
  }

  req.user = user;
  next();
}

// Optional auth - continues even without token
export async function optionalAuth(
  req: Request,
  res: Response,
  next: NextFunction
) {
  const authHeader = req.headers.authorization;

  if (authHeader?.startsWith('Bearer ')) {
    const token = authHeader.split(' ')[1];
    req.user = await verifyToken(token) ?? undefined;
  }

  next();
}
```

### src/middleware/error.ts
```typescript
import { Request, Response, NextFunction } from 'express';

export class AppError extends Error {
  constructor(
    public statusCode: number,
    message: string
  ) {
    super(message);
    this.name = 'AppError';
  }
}

export function errorHandler(
  err: Error,
  req: Request,
  res: Response,
  next: NextFunction
) {
  console.error(err);

  if (err instanceof AppError) {
    return res.status(err.statusCode).json({ error: err.message });
  }

  return res.status(500).json({ error: 'Internal server error' });
}
```

### src/middleware/validate.ts
```typescript
import { Request, Response, NextFunction } from 'express';
import { z, ZodSchema } from 'zod';

export function validate<T extends ZodSchema>(schema: T) {
  return (req: Request, res: Response, next: NextFunction) => {
    try {
      req.body = schema.parse(req.body);
      next();
    } catch (error) {
      if (error instanceof z.ZodError) {
        return res.status(400).json({
          error: 'Validation failed',
          details: error.errors,
        });
      }
      next(error);
    }
  };
}
```

---

## Routes

### src/routes/auth.ts
```typescript
import { Router } from 'express';
import { z } from 'zod';
import { supabase } from '../lib/supabase';
import { validate } from '../middleware/validate';

const router = Router();

const signUpSchema = z.object({
  email: z.string().email(),
  password: z.string().min(8),
});

const signInSchema = z.object({
  email: z.string().email(),
  password: z.string(),
});

router.post('/signup', validate(signUpSchema), async (req, res, next) => {
  try {
    const { email, password } = req.body;

    const { data, error } =