Error in Nestjs Swagger: UnhandledPromiseRejectionWarning - The property `prototype` cannot be destructed from an 'undefined' or 'null' object

Question

Error in Nestjs Swagger: UnhandledPromiseRejectionWarning - The property `prototype` cannot be destructed from an 'undefined' or 'null' object

Currently, I am in the process of developing a Nestjs REST API project and need to integrate swagger. For reference, I followed this repository: https://github.com/nestjs/nest/tree/master/sample/11-swagger

However, during the setup, I encountered the following errors:


UnhandledPromiseRejectionWarning: TypeError: Cannot destructure property 'prototype' of 'undefined' or 'null'

and also this one:


UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block or by rejecting a promise which was not handled with .catch().

To further investigate, you can find the project here:
https://github.com/strdr4605/nestjs-rest-api/blob/swagger/src/main.ts

javascript typescript swagger nestjs

Answer 1

Answer №1

After fixing the configuration of Swagger, I discovered that the issue might have been caused by using ObjectID as the type of ID in the PUT/DELETE methods of both the controller and services. Once I changed it to a string type, everything started working smoothly.

Answer 2

After fixing the configuration of Swagger, I discovered that the issue might have been caused by using ObjectID as the type of ID in the PUT/DELETE methods of both the controller and services. Once I changed it to a string type, everything started working smoothly.

Answer 3

Answer №2

Encountered an issue with Swagger when attempting to parse payload for Kafka messages within the event controller. To address this, I utilized ApiExcludeEndpoint to exclude the message handler from being processed.

@ApiExcludeEndpoint()
@EventPattern('topic', Transport.KAFKA)
public async handleEvent(@Payload() message: EventDto): Promise<void> {
// ...

Answer 4

Encountered an issue with Swagger when attempting to parse payload for Kafka messages within the event controller. To address this, I utilized ApiExcludeEndpoint to exclude the message handler from being processed.

@ApiExcludeEndpoint()
@EventPattern('topic', Transport.KAFKA)
public async handleEvent(@Payload() message: EventDto): Promise<void> {
// ...

Error in Nestjs Swagger: UnhandledPromiseRejectionWarning - The property `prototype` cannot be destructed from an 'undefined' or 'null' object

Answer №1

Answer №2

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