NicoFish Posts - Answer Overflow

NicoFish

Explore posts from servers

•Created by NicoFish on 10/9/2024 in #help-and-questions

Extending client not typesafe

I'm working in a NestJS project and need to extend the prisma client to replace all Date with string. I have this code:

import { Injectable, OnModuleInit } from '@nestjs/common';
import { PrismaClient } from '~/types/prisma-schema';

export type WithSerializedDates<T> = T extends Date
  ? string
  : T extends Array<infer R>
    ? Array<WithSerializedDates<R>>
    : T extends object
      ? { [K in keyof T]: WithSerializedDates<T[K]> }
      : T;

export const withoutDates = <T>(model: T): WithSerializedDates<T> =>
  JSON.parse(JSON.stringify(model)) as WithSerializedDates<T>;

@Injectable()
export class PrismaService extends PrismaClient implements OnModuleInit {
  async onModuleInit(): Promise<void> {
    await this.$extends({
      query: {
        $allModels: {
          $allOperations: async ({ query, args }) => {
            return withoutDates(await query(args));
          },
        },
      },
    }).$connect();
  }
}

import { Injectable, OnModuleInit } from '@nestjs/common';
import { PrismaClient } from '~/types/prisma-schema';

export type WithSerializedDates<T> = T extends Date
  ? string
  : T extends Array<infer R>
    ? Array<WithSerializedDates<R>>
    : T extends object
      ? { [K in keyof T]: WithSerializedDates<T[K]> }
      : T;

export const withoutDates = <T>(model: T): WithSerializedDates<T> =>
  JSON.parse(JSON.stringify(model)) as WithSerializedDates<T>;

@Injectable()
export class PrismaService extends PrismaClient implements OnModuleInit {
  async onModuleInit(): Promise<void> {
    await this.$extends({
      query: {
        $allModels: {
          $allOperations: async ({ query, args }) => {
            return withoutDates(await query(args));
          },
        },
      },
    }).$connect();
  }
}

But when using the client, it does not apply the extension types.

7 replies

Gaming

Programming