NestJS / Prisma：键入'{ id：string； }' 不可分配给类型 'CustomersWhereUniqueInput'

Question

Today I'm working on a new project with NestJS, I'm pretty new to NestJS and in particular to Prisma. I followed this tutorial on the prisma documentation and tried to adapt it to my project.

As the error says, the problem occured inside the findOne function.

I think it's my gestion of types.

I have read a lot of things but nothing seems to correspond to the error I'm getting.

Here is my schema.prisma:

// This is your Prisma schema file,
// learn more about it in the docs: https://pris.ly/d/prisma-schema

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

model Customers {
  Id    Int     @default(autoincrement()) @id
  Firstname String  
  Lastname  String
  Username String @unique
  Password String
  accounts     Bank_account[] 
}

model Admin {
  Id    Int     @default(autoincrement()) @id
  Username    String
  Password    String
  accounts    Bank_account[]
}

model Bank_account {
  Id      Int     @default(autoincrement()) @id
  Balance     Int
  RIB     String?
  owner     Customers  @relation(fields: [owner_id], references: [Id])
  owner_id    Int
  admin   Admin     @relation(fields: [admin_id], references: [Id])
  admin_id    Int
  log_id    Int  
  
}

model Logs {
  Id    Int   @default(autoincrement()) @id
  Date   String?
  Type   String?
  State   Boolean?
  Bank_account    Int    
}

My customers.services.ts

import { CreateCustomerDto } from './dto/create-customer.dto';
import { UpdateCustomerDto } from './dto/update-customer.dto';
import { Get, Injectable, Param } from '@nestjs/common';
import { PrismaService } from 'src/prisma/prisma.service';
import { isNumberObject } from 'util/types';
import { Customer } from './entities/customer.entity.js';

@Injectable()export class CustomersService {  constructor(private prisma: PrismaService) {}

  create(createCustomerDto: CreateCustomerDto) {
    return 'This action adds a new customer';
  }

  findAll() {        
    return this.prisma.customers.findMany();  
    }

  @Get(':id')
  findOne(@Param('id') id: string) {  
    return this.prisma.customers.findUnique({ where: { id }});
  }

Everything seems alright with my controllers and modules.

I already tried to re-generate prisma.schema, I tried to add some useless values to my database, nothing seems to change.

I tried to change the ìd for Id but nest said Cannot find name 'Id'. Did you mean 'id'? Cannot find name 'Id'. Did you mean 'id'?

Answer 1

Type '{ id: string; }' is not assignable to type 'CustomersWhereUniqueInput'

Look at your column type for id :

Id    Int

when the primary key is a Int type, Prisma expects numeric ids in your queries.

So convert that string to an integer before you pass it to Prisma.

  @Get(':id')
  findOne(@Param('id') id: string) {  
    return this.prisma.customers.findUnique({ where: { id: parseInt(id) }});
  }