No dmmf available from new prisma client generator

[mdmower-csnw]

I wanted to try out Prisma's new client generator (available starting in v6.6) but best I can tell, there's no dmmf export available. As such, I don't think it's possible to extend the client based on the "Custom Prisma client location" readme instructions. The new generator is... well, new... so I thought I'd mention it here in case you know whether this is a bug or feature request that needs to be made at the Prisma project to export dmmf.

Here's a snippet that shows the only text match for "dmmf" in the generated client.ts:

export namespace Prisma {
  export type DMMF = typeof runtime.DMMF

And here's the Prisma generator config I'm using:

generator client {
  provider     = "prisma-client"
  output       = "../src/generated/prisma"
  moduleFormat = "esm"
}

[franky47]

Ah, thanks for checking, I saw their 6.6 announcement and wondered what it might involve for this library but hadn't had time to check.

I'll raise this question in their AMA tomorrow: https://www.youtube.com/watch?v=sNF48HF17Qg

[franky47]

From what they said (edit: video link)

• The DMMF is indeed not exposed, as they wish to move to a different API
• We should be able to generate the DMMF from a WASM tool: feat: add support for Wasm'd getDmmf prisma/prisma#17533

I'll try and run some experiments with this when I have a bit of free time (hopefully next week).

[asifroyal]

Any update on this issue?

[electrovir]

In the meantime, it is also possible to manually construct the DMMF object. Here's a small example with a very minimal user table:

import {type DMMFDocument} from 'prisma-field-encryption/dist/types.js';

const dmmf: DMMFDocument = {
  datamodel: {
    models: [
      {
        name: 'User',
        fields: [
          {
            isId: true,
            isList: false,
            isUnique: false,
            name: 'id',
            type: 'Int',
          },
          {
            documentation: '@encrypted',
            isId: false,
            isList: false,
            isUnique: false,
            name: 'email',
            type: 'String',
          },
          {
            isId: false,
            isList: false,
            isUnique: false,
            name: 'username',
            type: 'String',
          },
        ],
      },
    ],
  },
};

prismaClient.$extends(
  fieldEncryptionExtension({
    dmmf,
  }),
);

[electrovir]

• We should be able to generate the DMMF from a WASM tool: feat: add support for Wasm'd getDmmf prisma/prisma#17533

I figured out how to use getDmmf:

import internals from '@prisma/internals';

async function extractDmmf(prismaClient: PrismaClient) {
  return await internals.getDMMF({
    datamodel:
      // @ts-expect-error: _engineConfig does not exist in the types
      prismaClient._engineConfig.inlineSchema,
  });
}

prismaClient.$extends(
  fieldEncryptionExtension({
    dmmf: await extractDmmf(prismaClient),
  }),
);

[thesandlord]

Is there a way to extract the DMMF without using an async function? Right now I'm thinking the only option might be to use a prisma generator to create one that can be imported.

[franky47]

Is there something preventing you from using a top-level await?

Right now I'm thinking the only option might be to use a prisma generator to create one that can be imported.

That sounds like a good idea.

[yovanoc]

is there a plan to upgrade this lib to latest prisma or we need to fork ?

[franky47]

See #144.