Hi, I'm trying to use a JsonTransformingSerializer to transform an array of strings into one string ...

# serialization

[Ayfri]

Hi, I'm trying to use a JsonTransformingSerializer to transform an array of strings into one string if there is only one and keep as array else
I'm using this

override fun transformSerialize(element: JsonElement): JsonElement {
    require(element is JsonArray) // this serializer is used only with lists
    return element.singleOrNull() ?: element
}

Which is the exact code from the documentation but I'm getting nothing when there's one string and an array if multiple, what I'm doing wrong 🤔

[Ayfri]

Nevermind, I was removing the property on a failed filter on the json output