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Roles with a RolesGuard: user 403, admin 200 through the route. Called directly, the service still ran. This guard protects entry ...

In Spring MVC the ping took 4 ms. In NestJS, with a busy handler, 1402 ms. Same wait, very different cost. Full video, with the ...

A guard on the payments controller, and a refunds controller added later: anonymous refunds answered 200 in NestJS, 401 in ...

A NestJS Bun adapter that runs your app straight on Bun.serve(). Swap one line, keep every controller, pipe, guard and filter, and ...

A missing setting starts cleanly as undefined, and the first payment fails. A Zod schema makes Nest refuse at startup, with the key ...

A NestJS handler awaited a real timer for 1.5 seconds and a ping sent meanwhile took 2 ms. The handler suspended, and control ...

Welcome to my Prisma + NestJS tutorial series! In this tutorial, we'll learn how to build a real backend API using NestJS, Prisma ...

With trust proxy true (Express) or the framework strategy (Spring), the key was the leftmost X-Forwarded-For entry, which the client ...

Insufficient funds, short by 250, reached the client as "Internal server error". The safer default for an unknown error, but this one ...

The new @nestjs/http-client retries by default: GET and PUT were sent three times, POST once. RestClient and axios sent each ...

Spring 7's @Retryable counts retries after the first call; with no settings it made four calls a second apart. Nest's @Retry counts ...

A try block around chain.doFilter catches what the handler throws. The same try block around next() in NestJS middleware ...

RestClient, @nestjs/axios and the new @nestjs/http-client all waited the full ten seconds by default. With a timeout each gave up, ...

A store is not a store until someone can buy something. This episode builds orders, and it puts the money math where it belongs: ...

A Nest guard that returns false sends 403. A missing or invalid token is a 401, so throw UnauthorizedException for it and keep 403 ...

The same NestJS server with express-session prints nothing under NODE_ENV=development, and warns about its MemoryStore ...

You need logging, retry and caching on a class you are not allowed to touch. Subclassing gives you one class per combination; ...

A Nest @Retry handler over the new HTTP client's own retries: one request, nine calls. Spring's @Retryable over @Retryable: ...

A NestJS request class with three typed, validated fields, and the Swagger docs show {}. The types are still known at runtime; ...

RabbitMQ deletes a message once it's consumed. Kafka keeps an ordered log you can replay. Here's when to use each.