areindl / prisma-dbml-generator

Prisma DBML Generator

prisma-dbml-generator

Automatically generate a DBML schema from your Prisma Schema.

Updates every time npx prisma generate runs. Use dbdiagram.io to visualize your dbml files as Entity-Relationship Diagram:

Getting started

Prisma	prisma-dbml-generator
>=2.29.0	0.7.0
<2.29.0	0.6.0

1. Install this generator:

npm install -D prisma-dbml-generator

2. Add the generator to the schema.prisma

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

3. Running npx prisma generate for the following schema.prisma

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
  USER
}

generates the following schema.dbml to prisma/dbml

//// ------------------------------------------------------
//// THIS FILE WAS AUTOMATICALLY GENERATED (DO NOT MODIFY)
//// ------------------------------------------------------

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 {
  categoriesId Int [ref: > Category.id]
  postsId Int [ref: > Post.id]
}

Enum Role {
  ADMIN
  USER
}

Ref: Profile.userId - User.id

Ref: Post.authorId > User.id

4. Visualize the schema.dbml

Additional Options

Option	Description	Type	Default
projectDatabaseType	Project database type for dbdocs	string	null
projectName	Project name for dbdocs	string	null
projectNote	Project note for dbdocs	string	null
projectNotePath	Project note path to a markdown file for dbdocs	string	null
output	Output directory for the DBML file	string	./dbml
outputName	Name for the DBML file	string	schema.dbml
manyToMany	Create Many-To-Many join table	boolean	true
mapToDbSchema	Use mapped table name	boolean	true
includeRelationFields	Include relation fields	boolean	true

Use additional options in the schema.prisma

generator dbml {
  provider   = "prisma-dbml-generator"
  output     = "../dbml"
  outputName = "awesome.dbml"
  projectName = "Project Name"
  projectDatabaseType = "PostgreSQL"
  projectNote = "Test project description"
}

Development

npm run dev

npm test

Helpful

Prisma Generator