Issues with serialising LocalDateTime object in Kotlin

[Birajendu Sahu]

I am using com.fasterxml.jackson.core:jackson-databind gradle plugin in my Kotlin application to serialise my data classes in to json objects.

My class looks like this:

data class MyEntityClass(
    var id: Long,
    var name: String,
    var description: String? = null,
    var updatedAt: LocalDateTime,
    var createdAt: LocalDateTime

) 

When I serialise this class using  jackson object mapper I am getting a json in below format

{

  "id" : 10,

  "name" : "name10",

  "description" : "description10",

  "updatedAt" : {

    "nano" : 148000000,

    "year" : 2018,

    "month" : "JANUARY",

    "dayOfMonth" : 10,

    "dayOfWeek" : "WEDNESDAY",

    "dayOfYear" : 10,

    "hour" : 22,

    "minute" : 26,

    "second" : 54,

    "monthValue" : 1,

    "chronology" : {

      "id" : "ISO",

      "calendarType" : "iso8601"

    }

  },

  "createdAt" : {

    "nano" : 148000000,

    "year" : 2018,

    "month" : "JANUARY",

    "dayOfMonth" : 10,

    "dayOfWeek" : "WEDNESDAY",

    "dayOfYear" : 10,

    "hour" : 22,

    "minute" : 26,

    "second" : 54,

    "monthValue" : 1,

    "chronology" : {

      "id" : "ISO",

      "calendarType" : "iso8601"

    }

  }

}

How do I make updatedAt and createdAt as single string entry in resulting json.

[Tatu Saloranta]

On Wed, Jan 10, 2018 at 3:03 PM, Birajendu Sahu <bira...@gmail.com> wrote:
> I am using com.fasterxml.jackson.core:jackson-databind gradle plugin in my
> Kotlin application to serialise my data classes in to json objects.
>
> My class looks like this:
>
> data class MyEntityClass(
> var id: Long,
> var name: String,
> var description: String? = null,
> var updatedAt: LocalDateTime,
> var createdAt: LocalDateTime
>
> )
>
> When I serialise this class using jackson object mapper I am getting a json
> in below format

Since `LocalDateTime` is Java 8 date/time type, and since Jackson 2.x
does not require Java 8 (runs on Java 6, compiles on Java 7),
it does not provide support directly. You need to use Java 8 date/time
module from:

https://github.com/FasterXML/jackson-modules-java8/

and artifact name is `jackson-datatype-jsr310` (for Maven dependency
or to get jar).
Module is registered with

ObjectMapper mapper = ...;
mapper.registerModule(new JavaTimeModule());

Without adding this module databind just sees a weird POJO (with
getters) and serializes it that way.

-+ Tatu +-

>
> {

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