Fix conversion for blob, binary and bit type

[shiyuhang0]

TiDB Cloud serverless driver supports Unit8Array as input in v0.1.0. But it has a break change in v0.1.0:

• It returns Uint8array rather than string for blob, binary and bit type

Prisma Accept string and array for these types. Thus, conversion error occurs.

This PR fix this.

Test

Test succeed locally

schema and codes:

generator client {
  provider        = "prisma-client-js"
  previewFeatures = ["driverAdapters"]
}

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

model user {
  id    Int     @id @default(autoincrement())
  email String? @unique(map: "uniq_email") @db.VarChar(255)
  name  String? @db.VarChar(255)
  bytes Bytes?
}


import { connect } from '@tidbcloud/serverless';
import { PrismaTiDBCloud } from '@tidbcloud/prisma-adapter';
import { PrismaClient } from '@prisma/client';
import dotenv from 'dotenv';
import { fetch } from 'undici'

// setup
dotenv.config();
const connectionString = "xxx";
const connection = connect({ url: connectionString ,fetch});
const adapter = new PrismaTiDBCloud(connection);
const prisma = new PrismaClient({ adapter });


await prisma.user.deleteMany({})
// insert
const user = await prisma.user.create({
  data: {
    id: 1,
    email: '[email protected]',
    name: 'test',
    bytes: Buffer.from('FSDF',"base64"),
  },
})
console.log(user)

result:

{
  id: 1,
  email: '[email protected]',
  name: 'test',
  bytes: <Buffer 15 20 c5>
}

Other

This PR format the whole codes