@JsonProperty annotation is not working for fields with type of value class.

[matek2305]

Describe the bug
@JsonProperty annotation is not working for fields with type of value class.

To Reproduce

internal class ValueClassSerializationTest {

    private val mapper = jsonMapper {
        addModule(kotlinModule())
    }

    @Test
    internal fun `@JsonProperty value is used for value class typed fields`() {
        val container = Container(
            IntWrapper(1),
            IntWrapper(2),
        )
        assertThat(mapper.writeValueAsString(container))
            .isEqualTo("{\"a\":1,\"changed\":2}")
    }
}

data class Container(
    val a: IntWrapper,
    @JsonProperty("changed")
    val b: IntWrapper,
)

@JvmInline
value class IntWrapper(val value: Int)

Expected behavior

Expected :{"a":1,"changed":2}
Actual   :{"a":1,"b":2}

Versions
Kotlin: 1.6.0
Jackson-module-kotlin: 2.13.1
Jackson-databind: 2.13.1

[TheRishka]

Hey @matek2305 ! I have the same issues, there's clearly something wrong.
As a temporary fix, you could add field to the JsonProperty annotation. Works for me in that case. @field:JsonProperty

[k163377]

For those who came later:
Annotation of Jackson on functions containing value class will not work, so please specify get or field if possible.
The causes of this problem are summarized here.
ProjectMapK/jackson-module-kogera#46

[k163377]

I have submitted a summary of the root cause of this problem and how to address it as #651.
Progress will be managed there and this issue will be closed.