Structuring Express Apps with Layered Architecture
Think of your Express app as a three-story building: a web layer for HTTP traffic, a service layer for business logic, and a data layer for your database. This keeps code organized and testable.
Think of a layered architecture as a three-story building for your Express app. The top floor (Web Layer) handles HTTP requests and validation. The middle floor (Service Layer) contains your business logic. The basement (Data Access Layer) manages database interactions. This structure is essential for any REST API that needs to be maintained or scaled, as it enforces separation of concerns. The biggest footgun is mixing these layers, like putting database queries directly in your route handlers, which creates a tangled mess.
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