Having trouble consuming messages via subscription (nestjs-rabbitmq)

Hello, I’m having trouble leveraging @golevelup/nestjs-rabbitmq package and I’m not sure what I’m missing.

I’ve been following the docs wiring up the message queue to a NestJS application, but I’m publishing messages via the RabbitMQ admin client, but not getting any messages showing up via subscription handler.

Screenshots below:

Messaging Service / Module

App bootstrap

Publishing a message, but subscription handler is not invoking

[WonderPanda]

@collinwu Thanks for following up on this and writing up a detailed breakdown of how you solved the issue. In the future I will see about trying to add some kind of warning or logs that indicate that requests are being rejected due to interceptors

[collinwu]

i figured out where and what went wrong in my scenario.

i suppose a combination of factors played into this, but for anyone that might be facing a similar issue, check your nestjs pipes, guards, interceptors.

debugging led me to inspect: https://github.com/golevelup/nestjs/blob/master/packages/rabbitmq/src/amqp/connection.ts#L430

I was able to log a silent error telling me that the request was unauthorized. That was really the clue I needed. This led me to refer back to RabbitMQ usage with interceptors as I have a global auth guard enabled, but didn’t immediately make the connection this might have been the culprit.

Changing my global auth guard to return true for isRabbitContext(context) fixed the issue with the subscription handler not firing on messages. Now this library works as intended.

But having this issue led me to try to fill in some gaps in my knowledge about Nestjs in general. The FAQ section is where I started to understand how the Request Lifecycle works in Nest and other important concepts such as Hybrid Application which is what we’re shooting for in our use case.

Hope this helps another person who might have this issue in the future