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パッケージの使い方の最新へのアップデートとPrisma 6.18.0への対応
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README.md

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@@ -53,17 +53,18 @@ ut.code(); Learnに準拠したサンプルプロジェクトです。
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$ mkdir backend
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$ cd backend
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$ npm init
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$ npm install express cors
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$ npm install -D typescript tsx @types/express @types/cors
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$ npm install express @prisma/client dotenv cors
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$ npm install -D typescript tsx @types/express prisma @types/cors
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$ npx tsc --init
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$ npx prisma init
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```
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1. `/frontend/.env`を作成して、`VITE_API_ENDPOINT``http://localhost:3000`に設定する
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1. `/backend/package.json``type`フィールドを`module`に設定する
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1. `/backend/.env``WEB_ORIGIN``http://localhost:5173`に設定し、`DATABASE_URL`も設定する
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1. `/backend/prisma.config.ts``import "dotenv/config";`を追加して、`.env`の内容が読み込まれるようにする
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1. `/backend/prisma/schema.prisma`の内容をデータベースに反映させるために`npx prisma db push`を実行する
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1. `/backend/tsconfig.json``outDir`オプションを`./dist`にしてトランスパイル結果が`/backend/dist`に入るようにする
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1. `/backend/tsconfig.json``declaration`オプションと`declarationMap`オプションを消し`allowJs`オプションを`true`にしてPrismaが生成したJavaScriptファイルをトランスパイル結果に含めるようにする
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1. `/backend/dist``/backend/.gitignore`に追加する
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1. `/backend/package.json`を変更して次のコマンドが使えるようにする
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- `npm run dev``tsx`を使ってトランスパイル前のTypeScriptを直接実行する(開発環境用)

backend/main.mts renamed to backend/main.ts

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import express from "express";
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import cors from "cors";
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import { PrismaClient } from "./generated/prisma/index.js";
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import { PrismaClient } from "./generated/prisma/client.js";
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const app = express();
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const client = new PrismaClient();

backend/package-lock.json

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backend/package.json

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{
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"name": "backend",
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"type": "module",
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"scripts": {
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"dev": "tsx main.mts",
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"dev": "tsx --env-file=.env main.ts",
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"build": "tsc",
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"start": "node dist/main.mjs"
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"start": "node --env-file=.env dist/main.js"
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},
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"dependencies": {
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"@prisma/client": "^6.17.1",
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"@prisma/client": "^6.18.0",
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"cors": "^2.8.5",
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"dotenv": "^17.2.3",
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"express": "^5.1.0"
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},
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"devDependencies": {
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"@types/cors": "^2.8.19",
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"@types/express": "^5.0.3",
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"prisma": "^6.17.1",
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"prisma": "^6.18.0",
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"tsx": "^4.20.6",
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"typescript": "^5.9.3"
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}

backend/prisma.config.ts

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import "dotenv/config";
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import { defineConfig, env } from "prisma/config";
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export default defineConfig({
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schema: "prisma/schema.prisma",
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migrations: {
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path: "prisma/migrations",
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},
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engine: "classic",
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datasource: {
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url: env("DATABASE_URL"),
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},
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});

backend/prisma/schema.prisma

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// Try Prisma Accelerate: https://pris.ly/cli/accelerate-init
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generator client {
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provider = "prisma-client-js"
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provider = "prisma-client"
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output = "../generated/prisma"
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}
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backend/tsconfig.json

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// Other Outputs
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"sourceMap": true,
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// "declaration": true,
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// "declarationMap": true,
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"allowJs": true,
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"declaration": true,
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"declarationMap": true,
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// Stricter Typechecking Options
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"noUncheckedIndexedAccess": true,

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