PrismaClientConstructorValidationError: Unknown property _originalClient provided to PrismaClient constructor.

[gcor]

Hello! Could you kindly help me understand an issue I’m having with the Casbin adapter for Prisma@6?

"use strict";

import fp from "fastify-plugin";
import casbin from "fastify-casbin";
import { PrismaAdapter } from "casbin-prisma-adapter";

export default fp(
  async function (fastify, opts) {
    fastify.register(casbin, {
      model: "model.conf",
      adapter: await PrismaAdapter.newAdapter(fastify.prisma),
    });
  }, { dependencies: ["prisma"] }
);

Error: PrismaClientConstructorValidationError: Unknown property _originalClient provided to PrismaClient constructor.

[hsluoyz]

@nodece @Shivansh-yadav13

[Luchanso]

The same issue

[hsluoyz]

@Luchanso can you provide a full reproducible example code repo?

[Luchanso]

This is a floating bug (now everything okey) and I'm sure this 100% in prisma-adapter, and I think problem can be with instanceof, when prisma client saved like "options" (not like instance of prisma client)

[wuhao1477]

After testing, I found that this issue doesn't occur with Prisma versions 6.0.0 and 6.1.0, but starts appearing in versions after 6.1.0. As mentioned in comment #62 (comment), the problem seems to be caused by the code at https://github.com/node-casbin/prisma-adapter/blob/master/src/adapter.ts#L27. I tried printing to the console and found that the result is false.

I believe this is related to how the instanceof check is handled when the Prisma client is saved as "options" rather than as an instance of the Prisma client. This explains why the behavior changes between different Prisma versions.

[hsluoyz]

@Luchanso @wuhao1477 can you make a PR to fix it?