Setting the name attribute results in a schema change

[clintonb]

Is there an existing issue for this?

• I have searched the existing issues

Current behavior

Setting the name attribute on the ApiProperty decorator changes the generated OpenAPI JSON. For example, say I have a property named lane. If I do not set the name attribute, I get:

"lane": {
  "$ref": "#/components/schemas/NestedLaneDto"
}

If I do set the attribute, I get:

"lane": {
  "allOf": [
    {
      "$ref": "#/components/schemas/NestedLaneDto"
    }
  ]
}

These are roughly equivalent, but the allOf declaration can have issues as mentioned in #2948.

Minimum reproduction code

https://gist.github.com/clintonb/16195739bf913e636f9ef4ead4bbbbdb

Steps to reproduce

1. Create a DTO that references another type/DTO.
2. Set the name attribute on the ApiProperty decorator.

Expected behavior

The generated output should not change.

Package version

7.3.1

NestJS version

10.3.0

Node.js version

20.12.2

In which operating systems have you tested?

• macOS
• Windows
• Linux

Other

No response

[clintonb]

The root cause is the same as #2948. Moving the discussion there.

[clintonb]

Reopening because fixing this exact issue should be easier—require less OpenAPI spec research—than nullable.