MikroORM Adapter

Resources

MikroORM documentation

Setup

Installation

npm install @mikro-orm/core @auth/mikro-orm-adapter

pnpm add @mikro-orm/core @auth/mikro-orm-adapter

yarn add @mikro-orm/core @auth/mikro-orm-adapter

bun add @mikro-orm/core @auth/mikro-orm-adapter

Environment Variables

DATABASE_CONNECTION_STRING=./db.sqlite

Configuration

./auth.ts

import NextAuth from "next-auth"
import { MikroOrmAdapter } from "@auth/mikro-orm-adapter"
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  adapter: MikroOrmAdapter({
    // MikroORM options object - https://mikro-orm.io/docs/next/configuration#driver
    dbName: process.env.DATABASE_CONNECTION_STRING,
    type: "sqlite",
    debug: true,
  }),
  providers: [],
})

./src/auth.ts

import { SvelteKitAuth } from "@auth/sveltekit"
import { MikroOrmAdapter } from "@auth/mikro-orm-adapter"
 
export const { handle, signIn, signOut } = SvelteKitAuth({
  adapter: MikroOrmAdapter({
    // MikroORM options object - https://mikro-orm.io/docs/next/configuration#driver
    dbName: process.env.DATABASE_CONNECTION_STRING,
    type: "sqlite",
    debug: true,
  }),
  providers: [],
})

./src/routes/auth.route.ts

import { ExpressAuth } from "@auth/express"
import { MikroOrmAdapter } from "@auth/mikro-orm-adapter"
 
const app = express()
 
app.set("trust proxy", true)
app.use(
  "/auth/*",
  ExpressAuth({
    providers: [],
    adapter: MikroOrmAdapter({
      // MikroORM options object - https://mikro-orm.io/docs/next/configuration#driver
      dbName: process.env.DATABASE_CONNECTION_STRING,
      type: "sqlite",
      debug: true,
    }),
  })
)

Advanced usage

Passing custom entities

The MikroORM adapter ships with its own set of entities. If you’d like to extend them, you can optionally pass them to the adapter.

This schema is adapted for use in MikroORM and based upon our main schema

./auth.ts

import config from "config/mikro-orm.ts"
import {
  Cascade,
  Collection,
  Entity,
  OneToMany,
  PrimaryKey,
  Property,
  Unique,
} from "@mikro-orm/core"
import { defaultEntities } from "@auth/mikro-orm-adapter"
 
const type { Account, Session } = defaultEntities
 
@Entity()
export class User implements defaultEntities.User {
  @PrimaryKey()
  id: string = randomUUID()
 
  @Property({ nullable: true })
  name?: string
 
  @Property({ nullable: true })
  @Unique()
  email?: string
 
  @Property({ type: "Date", nullable: true })
  emailVerified: Date | null = null
 
  @Property({ nullable: true })
  image?: string
 
  @OneToMany({
    entity: () => Session,
    mappedBy: (session) => session.user,
    hidden: true,
    orphanRemoval: true,
    cascade: [Cascade.ALL],
  })
  sessions = new Collection<Session>(this)
 
  @OneToMany({
    entity: () => Account,
    mappedBy: (account) => account.user,
    hidden: true,
    orphanRemoval: true,
    cascade: [Cascade.ALL],
  })
  accounts = new Collection<Account>(this)
 
  @Enum({ hidden: true })
  role = "ADMIN"
}
 
export const { handlers, auth, signIn, signOut } = NextAuth({
  adapter: MikroOrmAdapter(config, { entities: { User } }),
})

Including default entities

You may want to include the defaultEntities in your MikroORM configuration to include them in Migrations etc.

To achieve that include them in your “entities” array:

config/mikro-orm.ts

import { Options } from "@mikro-orm/core"
import { defaultEntities } from "@auth/mikro-orm-adapter"
 
const config: Options = {
  entities: [VeryImportantEntity, ...Object.values(defaultEntities)],
}
 
export default config

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