Mongoose Error: Cannot read property 'length' of undefined in NestJs - mongodb

Question

I am using nests framework and versions of mongodb and mongoose are as specified below.
Please refer to the screenshot for error in detail.
versions
"mongodb": "4.0.0",
"mongoose": "5.5.12",
Error Screenshot
User Document Module
import { Module } from '#nestjs/common';
import { UserDocumentsService } from './user-documents.service';
import { UserDocumentsController } from './user-documents.controller';
import { MongooseModule } from '#nestjs/mongoose';
import { UserDocumentsSchema } from './schema/user-documents.schema';
#Module({
imports: [
// showing error on this line
MongooseModule.forFeature([
{ name: 'UserDocument', schema: UserDocumentsSchema },
]),
],
controllers: [UserDocumentsController],
providers: [UserDocumentsService],
})
export class UserDocumentsModule {}
App.module.ts
#Module({
imports: [
MongooseModule.forRootAsync({
imports: [SharedModule],
useFactory: async (configService: ConfigService) => ({
uri: configService.mongoDBName(),
useNewUrlParser: true,
useFindAndModify: false,
}),
inject: [ConfigService],
}),
UserDocumentsModule,
],
providers: [AppGateway],
})
export class AppModule implements NestModule {
configure(consumer: MiddlewareConsumer): MiddlewareConsumer | void {
consumer.apply(contextMiddleware).forRoutes('*');
}
}
UPDATE
I think there is something wrong with the mongoose imports in the schema file. It says "could not find declaration for module 'mongoose'".
I tried removing and reinstalling mongoose and it's types. But now it shows new error.
I tried solutions mentioned in this post:
Node.js heap out of memory
But this also didn't work for me.
I'm using Mac-M1 with 8GB config.
UPDATE
The issue has been resolved now. The project is running on node v10.24.1 and I was using node v16.6.2.
After downgrading node version using NVM, this issue is gone.

Answer 1

You'll have to pull SharedModule import off MongooseModule.
Try this:
#Module({
imports: [
MongooseModule.forRootAsync({
useFactory: async (configService: ConfigService) => ({
uri: configService.mongoDBName(),
useNewUrlParser: true,
useFindAndModify: false,
}),
inject: [ConfigService],
}),
UserDocumentsModule,
SharedModule
],
providers: [AppGateway],
})
export class AppModule implements NestModule {
configure(consumer: MiddlewareConsumer): MiddlewareConsumer | void {
consumer.apply(contextMiddleware).forRoutes('*');
}
}

Answer 2

It was because I was using a wrong version of node. The project was built on node v10.24.1 and I was using node v16.6.2.
After downgrading node version using NVM, I was able to fix this issue.