Nested Relations not working

[argupta23]

Steps to reproduce

There are 3 controllers

1. User
2. Devicetempl
3. Device

Models have the following relations

User.model.ts
@hasmany(() => Device)
devices: Device[];
@hasmany(() => Devicetempl)
devicetempls: Devicetempl[];

Devicetempl.model.ts
@hasmany(() => Device)
devices: Device[];
@belongsTo(() => User)
userId: string;

device.model.ts
@belongsTo(() => Devicetempl)
devicetemplId: string;

using "lb4 relation" I've confirmed that all inclusion resolvers for these relationships are in place and working. The relevant portion of my backend function is below:

async find(@param.path.string('id') id: string>): Promise<(User & UserRelations)[]> { let foundUser = await this.userRepository.find({ include: [ { relation: 'devicetempls', scope: { include: [{relation: 'devices'}], }, }, ], where: {id: id}, }); return foundUser; }

When I test it within explorer I am able to get the associated devicetempl's associated with this user, but it does not contain the devices associated with the devicetempl.

Looking into the mongodb debug log, I can see the result of the query does contain the devices associated with the devicetempl, but for some reason they are not contained in the explorer output.

loopback:connector:mongodb all Device { fields: [ 'deviceid' ], where: {} } null [ { _id: 5f3c7d49d1b72df053895ee6, deviceid: '1234567' }, { _id: 5f3d6551c3f1126e385867db, deviceid: 'abcdef' } ]

I've confirmed that my formatting looks correct using issues #3453 and #4644, as well as reading the bottom section of these master docs:
https://github.com/strongloop/loopback-next/blob/master/docs/site/HasMany-relation.md#query-multiple-relations
.Additionally, a previous StackOverflow question (48391685) seems to address this formatting and everything looks to match.

Is there a possible bug between Loopback 4 and MongoDB nested HasMany queries or does anyone else possibly spot anything else wrong with what I am doing?

Thank you in advance for the help!

Additional information

npm ls --prod --depth 0 | grep loopback
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── @loopback/[email protected]
├── [email protected]

[dhmlau]

@agnes512, could you please take a look? Thanks.

[argupta23]

@dhmlau

Earlier last week I brought this up on the Slack channel and with help from Agnes was able to resolve the issue.

Thanks again for your help.