includeRelations bug

[hacksparrow]

Steps to reproduce

Checkout https://github.com/strongloop/loopback4-example-shopping/tree/bug/include-relations.

Run npm t, it will fail with: Error: expected 200 "OK", got 422 "Unprocessable Entity".

Now, change getModelSchemaRef(Order, {includeRelations: true}) to getModelSchemaRef(Order) in order.controllers.ts. Run npm t again, test will pass now.

Apparent Cause

The actual schema of NewUserRequest model is being overwritten by its parent model User, hence the request body becomes unprocessable as the User model does not have a password property.

Acceptance Criteia

• Fix the bug
• Publish new package
• npm t on https://github.com/strongloop/loopback4-example-shopping/tree/bug/include-relations should pass with the updated package.

[dhmlau]

cc @jannyHou - I think you were investigating it at some point.

[hacksparrow]

Checked with the latest dependencies, it is working fine now. Maybe something in the later version of @loopback/repository fixed it? Since the version used in the buggy app is one major version lower, it is hard to check what was causing it.

@jannyHou any idea? I remember you had mentioned of a probable cause.