如何显示特定字段使用ebean关系

how to show specific field use ebean relation

... 是我的代码

    @ManyToOne
    @JoinColumn(name = "destination_country_id", referencedColumnName = "id", table = "countries", insertable = false, updatable = false)
    public Country country;

...

是结果

"id": 139,
"country": {
            "id": 1,
            "iso": "AU",
            "name": "Australia",
            },
"country_id": 1

...

希望结果是

"id": 139,
"country": "australia",
"country_id": 1,

...

添加此代码并更改为 private in var country

@Column(name = "name", table = "countries")
public String country_name;

这是我的新代码

@ManyToOne
@JoinColumn(name = "destination_country_id", referencedColumnName = "id", table = "countries", insertable = false, updatable = false)
private Country country;

@Column(name = "name", table = "countries")
public String country_name;