JsonIgnoreProperties depth on a field

[JR-Mitchell]

I am struggling to achieve a piece of behaviour with Jackson in Kotlin.
A minimal example is:

{
    "class": "Parent",
    "parentValue": 1,
    "childValue": 1,
    "action": {
        "class": "Action",
        "actionValue": 1
    }
}

data class Parent(
    val `class`: String = "Parent",
    val parentValue: Int = 0,
    @field:JsonUnwrapped
    @field:JsonIgnoreProperties("class")
    val base: Child = Child()
)

data class Child(
    val `class`: String = "Child",
    val childValue: Int = 0,
    val action: Action? = null
)

data class Action(
    val `class`: String = "Action",
    val actionValue: Int = 0
)

The fact that Child must be a separate data class to Parent, rather than including its properties directly in the constructor of Parent, is a requirement of the data structure.

In this example, I must ignore the value of class on the @JsonUnwrapped Child instance, since otherwise there would be a clash when serialising between Parent.class and Parent.base.class. However, using @field:JsonIgnoreProperties("class") also ignores the class property on the action, meaning that the data serialises to:

{
    "class": "Parent",
    "parentValue": 1,
    "childValue": 1,
    "action": {
        "actionValue": 1
    }
}

Is there any way of specifying a property to be ignored using the @JsonIgnoreProperties annotation only to a certain depth, or alternatively, by the class type in which it appears? (e.g @field:JsonIgnoreProperties("Child::class"))

[JooHyukKim]

You might want to ask over at Kotlin module repo

[JR-Mitchell]

Thank you, apologies for asking in the wrong place.
I have moved this to Issue #698 on that repo, and will close the discussion.

[JooHyukKim]

Np! 👍🏻