Building High-Scale Multi-Tenant Applications with Next.js 14 and Prisma

# Building High-Scale Multi-Tenant Applications Multi-tenancy is a fundamental requirement for modern SaaS platforms. In this deep dive, we explore how to design tenant-isolated architectures using Next.js 14 App Router and Prisma ORM. ## Key Architectural Principles 1. **Schema vs Row-Level Isolation**: Row-level tenant isolation using tenant IDs. 2. **Prisma Connection Pooling**: Managing database connection lifecycles across serverless routes. 3. **Middleware Authorization**: Validating tenant headers and JWT claims on incoming edge requests. ## Code Example ```typescript import { prisma } from "@/lib/db"; export async function getTenantData(tenantId: string) { return await prisma.project.findMany({ where: { authorId: tenantId }, }); } ``` Conclusion: By structuring database queries with tenant scope, applications stay secure and performant.