Prisma 7 generated client errors with “Must call super constructor” when bundled via Nx/Webpack

[michaelschung]

I recently upgraded to Prisma 7 in an Nx/NestJS monorepo. All queries still work, but every DB call logs this (non-breaking) error:

ERROR [ExceptionsHandler] Must call super constructor in derived class before accessing 'this' or returning from derived constructor
ReferenceError: Must call super constructor in derived class before accessing 'this' or returning from derived constructor
    at new D (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:15:13093)
    at la (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:15:38056)
    at e.interpretNode (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:15:43668)
    at processTicksAndRejections (node:internal/process/task_queues:105:5)
    at e.interpretNode (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:15:42290)
    at e.interpretNode (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:15:43464)
    at e.run (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:15:40736)
    at execute (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:61:670)
    at _v.request (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:62:2186)
    at Object.singleLoader (/<ROOT>/dist/apps/backend/webpack:/libs/prisma-client/src/generated/runtime/client.js:69:5744)

Monorepo structure:

apps/backend
libs/prisma-client
prisma/schema.prisma

Webpack config for backend:

const { NxAppWebpackPlugin } = require('@nx/webpack/app-plugin');
const { join } = require('path');

module.exports = {
	output: {
		path: join(__dirname, '../../dist/apps/backend'),
	},
	plugins: [
		new NxAppWebpackPlugin({
			target: 'node',
			compiler: 'tsc',
			main: './src/main.ts',
			tsConfig: './tsconfig.app.json',
			optimization: false,
			outputHashing: 'none',
			generatePackageJson: true,
		}),
	],
};

Prisma generator (noting that Prisma 7 requires a custom output path, as opposed to the old default node_modules/.prisma.

generator client {
  provider      = "prisma-client-js"
  binaryTargets = ["native", "linux-musl"]
  output        = "../libs/prisma-client/src/generated"
  engineType    = "client"
}

All DB types are generated under libs/prisma-client/src/generated. My TypeScript path mapping points @monorepo/prisma-client to libs/prisma-client/src/index.ts.

To the best of my understanding, the error in question has to do with Prisma’s generated client runtime being incompletely or improperly bundled. Specifically, it seems like the engine binaries or runtime files are either missing or being transformed by Webpack, causing class inheritance errors at runtime. But please let me know if I’m looking in the wrong place.

Any help is greatly appreciated!

[michaelschung]

Update: I'm an idiot and I forgot to update provider to prisma-client` in the Prisma client generator. All is well.