How to generate UUIDs in Prisma

UUIDs (Universally Unique Identifiers) are often used for uniquely identifying records in a database. Prisma makes it incredibly easy to use UUIDs for this purpose. In this guide, we’ll go over how to generate and use UUIDs in Prisma.

Requirements

• Node.js
• Prisma CLI
• A database that supports UUIDs (e.g., PostgreSQL, MySQL 8.0+)

Setup Your Prisma Schema

Firstly, you’ll want to specify that a field should be a UUID in your Prisma schema. Open schema.prisma and modify it like this:

model User {
  id   String @id @default(uuid())
  name String
}

Here, the id field is set to be a UUID. The @default(uuid()) directive tells Prisma to generate a UUID by default.

Migrate Database

Apply the migration to update the database schema.

prisma migrate dev --name init

Insert Data

When you create a new user, Prisma will automatically populate the id field with a UUID.

const { PrismaClient } = require('@prisma/client')
const prisma = new PrismaClient()

async function main() {
  const newUser = await prisma.user.create({
    data: {
      name: 'John Doe',
    },
  })
  console.log(`Created new user: ${newUser}`)
}

Retrieve Data

Retrieving data remains unchanged. You can query the id field like any other field.

const user = await prisma.user.findUnique({
  where: {
    id: 'some-uuid',
  },
})

Update Data

You can also update a UUID field if needed, though this is generally not recommended for fields serving as primary keys.

const updatedUser = await prisma.user.update({
  where: { id: 'some-uuid' },
  data: { id: 'new-uuid' },
})

Tips

• For PostgreSQL, consider using the native uuid-ossp extension for UUID generation. You can enable it via a Prisma migration.

-- Enable UUID generation in PostgreSQL
CREATE EXTENSION IF NOT EXISTS "uuid-ossp";

• For MySQL 8.0+, UUIDs are supported natively, and no additional configuration is needed.
• For SQLite, you will have to generate the UUID in your application code, as SQLite doesn’t natively support UUID generation.

Conclusion

That’s it. You’ve learned how to set up, insert, query, and update UUIDs in Prisma. It’s a straightforward process that adds a layer of uniqueness and complexity to your data models.