Modifying Model Schema/Class

[MisieX]

Hi,
I have a few questions regarding model schema generated by swagger:

1. How do I modify foreign key property in json model schema? I know I can use

@JsonIdentityInfo(generator = ObjectIdGenerators.PropertyGenerator.class, property = "id")
@JsonIdentityReference(alwaysAsId = true)
@JsonProperty("foreignId")

and it works when I press the "Try It Out!". But is does NOT affect the model schema generated. In example: what would I need to do, to see only the category Id and not the whole Category when getting Persons in this project?

1. In this project, model schema for GET /api/v1/cars is

{
  "model": "string",
  "year": "string",
  "make": "string"
}

but for the GET /api/v1/categories it is

even tough both Controllers return arrays of plain pojos. Why is that?