What does this skill do?

The Prisma ORM in Production Skill provides schema design patterns, query optimization, transaction management, and solutions to the most critical pitfalls of Prisma ORM in TypeScript backends. It prevents common errors in migrations, bulk operations, and serverless deployments, ensuring robust and secure code from the very first deployment.

Schematic Design
Define IDs using @default(cuid()), relationships, and @@index indexes on foreign keys and filter columns.
Inquiries and Transactions
Optimizes pagination by cursor, avoids the N+1 problem with SELECT, and manages interactive transactions with timeouts.
Mass Operations
Handles `updateMany` and `deleteMany` without compromising the integrity of audit fields such as `@updatedAt`.
Serverless deployment
Configure PrismaClient as a singleton with `connection_limit=1` and PgBouncer for Vercel or AWS Lambda.

Usage examples

🗂️ Outline Design
Design the Prisma schema for a blogging app with authors, posts, and comments, including indexes and relationships.
⚡ Query Optimization
This query has N+1 and over-fetch issues. Optimize it by using `SELECT` instead of `INCLUDE`.
🚀 Serverless Configuration
Configure PrismaClient as a singleton for a serverless deployment on Vercel with PgBouncer.
🔄 Migration to production
Review my Prisma migration before deploying it to production using `migrate deploy`.

Features

Optimal Schematic Design ID Strategy Using @default(cuid()), @@index on Foreign Keys, and Columns Used in WHERE or ORDER BY Clauses.
Connection Management PrismaClient singleton, `connection_limit=1` in the URL, and an external manager such as PgBouncer for serverless.
Pagination by Cursor Avoid the inefficiencies of offset printing for large volumes by using consistent pagination and a secondary order.
Safe Migration Run `migrate dev` only locally; run `migrate deploy` in CI/CD and production to avoid unexpected restarts.
Pitfalls of Mass Transactions Proper handling of @updatedAt in updateMany and deleteMany to maintain audit integrity.

Frequently asked questions

Check with `npx prisma --version`. Recent versions may require driver adapters such as `@prisma/adapter-pg` and use `relationJoins` by default.
Yes. Use `connection_limit=1` in the database URL and an external connection manager such as PgBouncer to prevent the connection pool from being exhausted on Vercel or AWS Lambda.
Use `select` instead of `include` on hot paths to control exactly which fields are queried and avoid over-fetching data in complex relationships.
No. `migrate dev` is only for the local environment. In CI/CD and production, always use `migrate deploy` to apply migrations safely without restarting the database.
Prisma ORM in Production — Patterns and Critical Pitfalls with Claude AI

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