Empty arrays stripped from response objects

[nmkataoka]

Description / Steps to reproduce / Feature proposal

Previously, hasMany relations showed up in GET requests as null properties. Now they are stripped out, even if the hasMany properties are filled in manually.

I think it's related to removing the array property from hasMany properties
56ab017
#1944

For example, if User model hasMany Experience models, sometimes we would have GET requests look like:

let user = await this.userRepository.getById(id); user.experiences = await this.userRepository.experiences(profile.id).find(); return user;
Right now, no matter what is in user.experiences, the whole property is stripped from the response. Logging before the response confirms that the object has an experiences array.

I confirmed it's due to a recent change in '@loopback/repository' by changing versions.

Current Behavior

HasMany properties are stripped from responses.

Expected Behavior

If the array is manually populated, it should be returned. We didn't mind returning NULL properties otherwise.

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[stale]

This issue has been closed due to continued inactivity. Thank you for your understanding. If you believe this to be in error, please contact one of the code owners, listed in the CODEOWNERS file at the top-level of this repository.