TypeScript error: PrismaClient expects constructor options when using generated client

I’m trying to add Prisma to an Express + TypeScript project to handle PostgreSQL queries by following the official Prisma docs.

According to the docs, after generating the client I should be able to do:

const prisma = new PrismaClient();

However, I’m getting TypeScript errors when doing this.

Prisma schema

generator client { provider = "prisma-client" output = "../src/generated/" prismaSchemaFolder = true } datasource db { provider = "postgresql" }

After running prisma generate, I import the client like this:

import { PrismaClient } from "../generated/client"; const prisma = new PrismaClient();

Error

Expected 1 arguments, but got 0.ts(2554) class.ts(73, 5): An argument for 'options' was not provided.

The Prisma docs don’t mention any mandatory constructor options.

When I try to pass a datasourceUrl explicitly as it is a mentioned optional parameter:

import { PrismaClient } from "../generated/client"; const prisma = new PrismaClient({ datasourceUrl: "postgresql://johndoe:randompassword@localhost:5432/mydb", }); export default prisma;

I get another error:

Object literal may only specify known properties, and 'datasourceUrl' does not exist in type Subset<PrismaClientOptions, PrismaClientOptions>.

What is the correct way to configure Prisma for an Express + TypeScript + PostgreSQL project when using a generated client?