Connecting to multiple databases with Prisma

code.js

/* 
 * Source: https://github.com/prisma/prisma/issues/2443#issuecomment-630679118
 * Client typings is generated with the cli commands below:
 * 
 * prisma generate --schema prisma/schema1.prisma
 * prisma generate --schema prisma/schema2.prisma
*/
import { PrismaClient as PrismaClient1 } from '../prisma/client1'
import { PrismaClient as PrismaClient2 } from '../prisma/client2'

const client1 = new PrismaClient1()
const client2 = new PrismaClient2()

schema1.prisma

datasource db {
  provider = "postgres"
  url      = env("DB1_URL")
}

generator client {
  provider = "prisma-client-js"
  output   = "./generated/client1"
}

model Model1 {
  id         Int @id @default(autoincrement())
  model1Name String
}

schema2.prisma

datasource db {
  provider = "postgres"
  url      = env("DB2_URL")
}

generator client {
  provider = "prisma-client-js"
  output   = "./generated/client2"
}

model Model2 {
  id         Int @id @default(autoincrement())
  model2Name String
}