[prisma] Basic

dependency

yarn add prisma

init

產生 schema file

SQL Schema 設定會用到 (opens in a new tab)

npx prisma init

Schema 參考

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

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

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

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

model Exchange {
  id        Int      @id @default(autoincrement())
  createdAt DateTime @default(now())
  bankname  String   @unique
  bankbuy   String
  banksell  String
  time      String?
  allowance Float?
}

資料庫的連線資料 PlanetScale 會給，密碼一產出來就要複製走不然之後不給看就要重新產了。

DATABASE_URL='mysql://username:password@database_url/database_name?sslaccept=strict'

Migrate

在本地端 migrate+產生 migration file 跟 prisma client 要用的檔案（type 就是從這邊自動產好，所以之後用 prisma client 都會有 type 提示，其實跟其他 ORM 套件一樣）。

npx prisma migrate dev --name init

migrate 推到 PlanetScale

npx prisma db push

跟 PlanetScale 資料庫連線要裝 pscale CLI

brew install planetscale/tap/pscale

pscale connect star-app initial-setup --port 3309
      databasename↑     branch↑

基本用法

最基本的 CRUD (opens in a new tab)

import { PrismaClient } from "@prisma/client";
 
const prisma = new PrismaClient();
 
async function main() {
  // ... you will write your Prisma Client queries here
}
 
main()
  .catch((e) => {
    throw e;
  })
  .finally(async () => {
    await prisma.$disconnect();
  });