create-quickstart-app/templates/lib/prismadb.ts

CLI tool to generate Next.js projects with various configurations

import { PrismaClient } from "@prisma/client";

declare global {
  var prisma: PrismaClient | undefined;
}

const prismadb = globalThis.prisma || new PrismaClient({ log: ["query"] });

if (process.env.NODE_ENV !== "production") {
  globalThis.prisma = prismadb;
}

export default prismadb;