@JsonProperty not honored in superclass fields

[marshallpierce]

Describe the bug
Controlling the serialized field name with @JsonProperty doesn't appear to be working for fields in a superclass.

To Reproduce

open class Parent(@JsonProperty("parent-prop") val parent: String)
class Child(@JsonProperty("child-prop") val child: String) : Parent(child)

println(jacksonObjectMapper().writeValueAsString(Child("foo")))

yields {"child-prop":"foo","parent":"foo"}.

Expected behavior

I would expect to see {"child-prop":"foo","parent-prop":"foo"}.

Versions
Kotlin: 1.5.20
Jackson-module-kotlin: 2.12.3
Jackson-databind: 2.12.3

[dinomite]

That’s pretty interesting. Seems likely a recent issue or we would have seen this previously.

[marshallpierce]

wild guess: changes in kotlin reflection behavior in 1.5?

edit: or maybe it's in jackson-databind and also affects Java? 🤷

[dinomite]

Happens in j-m-k 2.12 which is based on Kotlin 1.4.21 🤔

[dinomite]

Hmm, also happens in 2.11 (Kotlin 1.3.72)

[dinomite]

Not a databind issue, this works in Databind on 2.12:

import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class JacksonModuleKotlinGithub474 {
    static class Parent {
        @JsonProperty("parent-prop")
        String parent;

        public Parent(String parent) {
            this.parent = parent;
        }
    }

    static class Child extends Parent {
        @JsonProperty("child-prop")
        String child;

        public Child(String child) {
            super(child);
            this.child = child;
        }
    }

    @Test
    public void jsonPropertyAnnotationRespectedOnParentClass() throws Exception {
        assertEquals(
                "{\"parent-prop\":\"foo\",\"child-prop\":\"foo\"}",
                (new ObjectMapper()).writeValueAsString(new Child("foo"))
        );
    }
}

[vsigler]

Any update around this issue? Currently seeing it with 2.13.3 and Kotlin 1.6.

I've tried a number of older versions, but I've seen the problem with each. The earliest I tried was 2.10.x.

What works is to annotate the getter method, but that does not seem like the proper approach.

@get:JsonProperty("myPropName")

[k163377]

It is closed as a duplicate of #658.