debug:nestjs

Fix NestJS dependency injection errors by following a phase-based workflow: gather context, isolate the faulty provider, adjust module imports, and verify the fix. It also resolves circular dependencies using forward references and module restructuring.

NestJS guard or interceptor undefined errors often stem from incorrect provider scoping or missing module imports. Diagnose these issues systematically by isolating the execution context, checking guard registration, and applying concrete configuration snippets.

The best way to debug WebSocket gateway problems in NestJS is applying a four-phase methodology to isolate microservice communication failures. This targets gateway initialization, message payload validation, and transport layer misconfigurations.

Yes, you can use this workflow for pipe validation errors in NestJS. It provides structured guidance to isolate validation failures, trace incorrect payload transformations, and implement concrete code templates to correct the pipe logic.

Start debugging a NestJS module creation error by enabling debug mode with `nest start --debug --watch`. Follow the four-phase workflow to reproduce the error, locate the faulty provider, adjust imports, and re-run tests.