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Kokorone/.agents/skills/prisma-database-setup/references/mysql.md
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Jeffery f44200f543 feat: 完成 B 群組 — 資料層與核心領域模型
- 導入 Prisma 7.9.1 + SQLite(better-sqlite3 driver adapter),prisma.config.ts 管理連線設定
- 完整資料模型:User/Work/Character/CharacterAlias/EpisodicMemory/SemanticMemory/
  ProceduralRule/EmotionState/Relationship/SentimentLedgerEntry
- packages/db:Prisma Client 存取層(ESM,因 Prisma 7 產出的 generated client 僅支援 ESM)
- apps/api 隨之改為 ESM 以相容 packages/db
- packages/shared:新增角色/記憶/情緒/關係共用型別,api 與 web 皆從此匯入
- prisma/seed.ts:建立測試使用者與元氣型測試角色,含完整關係帳本與記憶種子資料
- apps/api:新增 GET /characters
- scripts/smoke/B.mjs:驗證資料表齊全、API 讀出種子角色、關係與記憶可寫入讀出
- 保留 Prisma 官方隨 CLI 附的 agent skill 文件(.agents/skills 等),供後續群組查閱

npm run restart && npm run smoke -- B 皆通過(B-V),A 群組冒煙測試無回歸。
2026-08-13 09:43:15 +08:00

2.6 KiB

MySQL Setup

Configure Prisma with MySQL (or MariaDB).

Prerequisites

  • MySQL or MariaDB database
  • Connection string

1. Schema Configuration

In prisma/schema.prisma:

datasource db {
  provider = "mysql"
}

generator client {
  provider = "prisma-client"
  output   = "../generated"
}

2. Config Configuration

In prisma.config.ts:

import { defineConfig, env } from 'prisma/config'

export default defineConfig({
  schema: 'prisma/schema.prisma',
  datasource: {
    url: env('DATABASE_URL'),
  },
})

3. Environment Variable

In .env:

DATABASE_URL="mysql://user:password@localhost:3306/mydb"

Connection String Format

mysql://USER:PASSWORD@HOST:PORT/DATABASE
  • USER: Database user
  • PASSWORD: Password
  • HOST: Hostname
  • PORT: Port (default 3306)
  • DATABASE: Database name

Driver Adapter

Use a driver adapter for the standard SQL workflow.

  1. Install adapter and driver:

    npm install @prisma/adapter-mariadb mariadb
    
  2. Instantiate Prisma Client with the adapter:

    import 'dotenv/config'
    import { PrismaClient } from '../generated/client'
    import { PrismaMariaDb } from '@prisma/adapter-mariadb'
    
    const adapter = new PrismaMariaDb({
      host: 'localhost',
      port: 3306,
      connectionLimit: 5,
      user: process.env.MYSQL_USER,
      password: process.env.MYSQL_PASSWORD,
      database: process.env.MYSQL_DATABASE,
    })
    
    const prisma = new PrismaClient({ adapter })
    

Text protocol option

If you need the MariaDB driver's text protocol instead of the default binary execute() path, enable useTextProtocol explicitly:

import { PrismaClient } from '../generated/client'
import { PrismaMariaDb } from '@prisma/adapter-mariadb'

const adapter = new PrismaMariaDb(process.env.DATABASE_URL!, {
  useTextProtocol: true,
})

const prisma = new PrismaClient({ adapter })

Use this only when you specifically need text-protocol compatibility for your MariaDB setup.

PlanetScale Setup

PlanetScale uses MySQL but requires specific settings because it doesn't support foreign key constraints.

In prisma/schema.prisma:

datasource db {
  provider     = "mysql"
  relationMode = "prisma" // Emulate foreign keys in Prisma
}

Common Issues

"Too many connections"

MySQL has a connection limit. Adjust connection pool size in URL:

DATABASE_URL="mysql://...?connection_limit=5"

JSON Support

MySQL 5.7+ supports JSON. MariaDB 10.2+ supports JSON (as an alias for LONGTEXT with check constraints). Prisma handles this, but verify your version.