/prisma-dbml-generator

Prisma DBML Generator

Primary LanguageTypeScriptMIT LicenseMIT

Prisma DBML Generator

npm version Build and Test CI

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:

DB 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
  1. Add the generator to the schema.prisma
generator dbml {
  provider = "prisma-dbml-generator"
}
  1. 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
  1. 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 dbml.schema
manyToMany Create Many-To-Many join table 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