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kotlinlang

Hi, i have probably stupid question, but so far i can't solve it ... I have class
```data class Molor(val molor: String) {

    val articleId: Long
    val colorId: Long

    override fun toString(): String {
        return molor.replace("_", "-")
    }

    init {
        validateEx(molor)
        val list = molor.split("_", "-")
        this.articleId = list[0].toLong()
        this.colorId = list[1].toLong()
    }
}```
that i want to deserialize with jackson (v2.8.1 with kotlin module 2.8.1)
but jackson tells me there is no string constructor ...
 ```com.fasterxml.jackson.databind.JsonMappingException: Can not construct instance of com.ps.models.Molor: no String-argument constructor/factory method to deserialize from String value ('00008979_0010')```