Complex Object beginning with 'is' is not serialised

[karsunke]

Naming an object attribute beginning with 'is' leads to not being serialised at all. This issue was fixed for booleans: #80

But still exists if we use an object:

import com.fasterxml.jackson.databind.ObjectMapper

data class Model(
    val isActive: Boolean,
    val isAvailable: EmbeddedModel
)

data class EmbeddedModel(
    val value: Boolean,
    val metaData: String
)

fun main() {

    val model = Model(
        isActive = true,
        isAvailable = EmbeddedModel(
            value = true,
            metaData = "someString"
        )
    )

    val objectMapper = ObjectMapper()

    println(objectMapper.writeValueAsString(model))
}

prints just {"active":true} It ignores isAvailable completely. This happens with 2.11.4 and 2.12.3. I also created a sample project to demonstrate this issue:

https://github.com/karsunke/jackson-kotlin-boolean

[dinomite]

Thanks for the report.

is-prefixed fields are only serialized if they are boolean, in accordance with the Java Beans spec §8.3.2. See further discussion in #337

You can override this behavior with a get use-site target. Example in this test:
https://github.com/FasterXML/jackson-module-kotlin/blob/2.12/src/test/kotlin/com/fasterxml/jackson/module/kotlin/test/github/failing/GitHub337.kt#L55