DBML generator for Prisma

Visualize Prisma Schema as Entity-Relationship Diagram

Marc Stammerjohann Marc Stammerjohann
Published at

Introducing 🥳 Prisma DBML Generator automatically generating a DBML schema based on your Prisma Schema.

DBML Generator

Simply install the DBML generator

npm install -D prisma-dbml-generator

Add the generator to your schema.prisma

generator dbml {
  provider = "prisma-dbml-generator"

Running npx prisma generate for the following Prisma schema

model User {
  id        Int      @id @default(autoincrement())
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  email     String   @unique
  name      String?
  posts     Post[]
  profile   Profile?
  /// user role
  role      Role     @default(USER)

/// User profile
model Profile {
  id     Int     @default(autoincrement()) @id
  bio    String?
  user   User    @relation(fields: [userId], references: [id])
  userId Int     @unique

model Post {
  id         Int        @id @default(autoincrement())
  title      String     @default("")
  content    String?
  published  Boolean    @default(false)
  author     User?      @relation(fields: [authorId], references: [id])
  authorId   Int?
  categories Category[]

model Category {
  id    Int    @id @default(autoincrement())
  name  String
  posts Post[]

/// user role
enum Role {
  ADMIN /// allowed to do everything

generates the following schema.dbml to prisma/dbml

Table User {
  id Int [pk, increment]
  createdAt DateTime [default: `now()`, not null]
  updatedAt DateTime [not null]
  email String [unique, not null]
  name String
  posts Post
  profile Profile
  role Role [not null, default: 'USER', note: 'user role']

Table Profile {
  id Int [pk, increment]
  bio String
  user User [not null]
  userId Int [unique, not null]

  Note: 'User profile'

Table Post {
  id Int [pk, increment]
  title String [not null, default: '']
  content String
  published Boolean [not null, default: false]
  author User
  authorId Int
  categories Category

Table Category {
  id Int [pk, increment]
  name String [not null]
  posts Post

Table CategoryToPost {
  categoryId Int [ref: > Category.id]
  postId Int [ref: > Post.id]

Enum Role {

Ref: Profile.userId - User.id

Ref: Post.authorId > User.id

Copy the schema.dbml content and visualize it as an Entity-Relationship Diagram:

Entity-Relationship Diagram

You should see this output each time you run npx prisma generate

$ npx prisma generate
Environment variables loaded from prisma/.env

✔ Generated Prisma Client to ./node_modules/@prisma/client in 281ms

✔ Generated DBML Schema to ./prisma/dbml in 5ms

You can now start using Prisma Client in your code:

import { PrismaClient } from '@prisma/client'
// or const { PrismaClient } = require('@prisma/client')

const prisma = new PrismaClient()

Explore the full API: http://pris.ly/d/client

Additional Options

Do you like to configure the output directory or even the output name 🤓? You can play around with the following options:

generator dbml {
  provider   = "prisma-dbml-generator"
  output     = "../dbml"
  outputName = "awesome.dbml"

Check out all options and give it a try with your own Prisma Schema 😎.

Sponsor us

Did you find this post useful? We at notiz.dev write about our experiences developing Apps, Websites and APIs and develop Open Source tools. Your support would mean a lot to us 🙏. Receive a reward by sponsoring us on Patreon or start with a one-time donation on GitHub Sponsors.

Table of Contents

Top of Page Comments Related Articles

Related Posts

Find more posts like this one.

Marc Stammerjohann
November 22, 2021

Prisma Migrate: Deploy Migration with Docker

Perform database migration with Prisma Migrate using Docker
Prisma Docker Read More
Marc Stammerjohann
September 12, 2022

Introducing NestJS Prisma Library and Schematics

Library and schematics to add Prisma integration to a NestJS application
NestJS Prisma Read More
Marc Stammerjohann
November 09, 2021

Dockerizing a NestJS app with Prisma and PostgreSQL

How to dockerize a NestJS application with Prisma and PostgreSQL.
NestJS Prisma Docker Read More
Marc Stammerjohann
April 07, 2020

GraphQL Code-First Approach with NestJS 7

Create a GraphQL API using Code-First Approach with NestJS 7.
NestJS GraphQL Prisma Read More
Marc Stammerjohann
November 09, 2021

Deploy NestJS with Prisma to Heroku

Deploy a NestJS application with Prisma 2.0 to Heroku and connect to a PostgreSQL database.
NestJS Prisma Heroku Read More
Marc Stammerjohann
June 17, 2021

How to query your database using Prisma with NestJS

Learn how to setup a database with Prisma 2.0 and query data using NestJS.
NestJS Prisma Read More

more coming soon

Get in Touch!

Sign up for our newsletter

Sign up for our newsletter to stay up to date. Sent every other week.

We care about the protection of your data. Read our Privacy Policy.