Generate empty json object using moshi json library

Question

What should my data class be so that when I convert it to json using moshi it would come out like this?

{"id":"abcdef""formValues":{}}

At the moment my class looks like this.

@JsonClass(generateAdapter = true)
class MyDataClass(
    @Json(name = "id")
    val id: String
) {

    @Json(name = "formValues")
    val formValues = FormValues()

    @JsonClass(generateAdapter = true)
    class FormValues
}

But you see the statement

Moshi.Builder().build().adapter(MyDataClass::class.java).toJson(MyDataClass("abcdef"))

produces this

{"id": "abcdef"}

and I want this

{"id":"abcdef""formValues":{}}

Egis · Accepted Answer · 2020-03-09 18:33:27Z

2

It turns out you have to use var instead of val for your class members. I change my class to this

@JsonClass(generateAdapter = true)
class MyDataClass(
    @Json(name = "id")
    var id: String
) {

    @Json(name = "formValues")
    var formValues = FormValues()

    @JsonClass(generateAdapter = true)
    class FormValues
}

and moshi generates json like this

{"id":"abcdef""formValues":{}}

edited Mar 9, 2020 at 18:33

answered Mar 9, 2020 at 17:04

Egis

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