Madhura68
10c52e8b8f
Vercel detecteert @prisma/client en runt automatisch `prisma generate` zonder --generator filter. Daardoor probeerde de erd-generator op Vercel te draaien en faalde op libnss3.so (puppeteer/Chrome niet beschikbaar in de build container). Cascading: de Prisma-client werd niet ge-update, runtime kreeg oude enum-waarden (ACTIVE i.p.v. OPEN). ERD is dev-only documentatie en niet meer in productie nodig. Generator + dependency + npm scripts + de gegenereerde svg verwijderd. README, prisma-client pattern en architecture docs bijgewerkt. Build script blijft `prisma generate && next build` zodat de client ook bij Vercel build-cache-hits opnieuw wordt gegenereerd.
71 lines
1.7 KiB
Markdown
71 lines
1.7 KiB
Markdown
---
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title: "Prisma Client singleton"
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status: active
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audience: [ai-agent, contributor]
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language: nl
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last_updated: 2026-05-03
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when_to_read: "When importing or initialising the Prisma client in server code."
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---
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# Patroon: Prisma Client singleton
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## lib/prisma.ts
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PostgreSQL via `pg` + `@prisma/adapter-pg` (Neon/Vercel).
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```ts
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import { PrismaClient } from '@prisma/client'
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import { Pool } from 'pg'
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import { PrismaPg } from '@prisma/adapter-pg'
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function createPrismaClient() {
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const url = process.env.DATABASE_URL
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if (!url) throw new Error('DATABASE_URL is not set')
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const pool = new Pool({ connectionString: url })
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const adapter = new PrismaPg(pool)
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return new PrismaClient({
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adapter,
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log: process.env.NODE_ENV === 'development' ? ['error', 'warn'] : ['error'],
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})
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}
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const globalForPrisma = globalThis as unknown as { prisma: PrismaClient | undefined }
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export const prisma = globalForPrisma.prisma ?? createPrismaClient()
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if (process.env.NODE_ENV !== 'production') globalForPrisma.prisma = prisma
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```
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## prisma.config.ts (Prisma v7 vereiste)
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```ts
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import 'dotenv/config'
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import { defineConfig } from 'prisma/config'
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export default defineConfig({
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schema: 'prisma/schema.prisma',
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migrations: { path: 'prisma/migrations' },
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})
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```
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## Prisma generator
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`prisma/schema.prisma` bevat één generator:
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```prisma
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generator client {
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provider = "prisma-client-js"
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}
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```
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`prisma generate` bouwt de Prisma Client naar `node_modules/@prisma/client`.
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## Commands
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| Command | Gebruik |
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|---|---|
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| `npx prisma db push` | Schema synchroniseren naar de database |
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| `npx prisma db seed` | Seeddata laden |
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| `npx prisma generate` | Prisma Client genereren (lokaal of CI) |
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| `npx prisma migrate deploy` | Pending migrations toepassen op de database |
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