```listOf( Person( name = "foo", age = 44, fooBar = "lol", isImp...

# spring

[ursus]

listOf(
    Person(
        name = "foo",
        age = 44,
        fooBar = "lol",
        isImportant = true,
        isNew = true
    )
)

Why does this get serialized into json as [{"id":null,"name":"foo","age":44,"fooBar":"lol","new":true,"important":true}] ?
I.e. missing the is prefixes?

What's even worse is when I try to deserialize the same json that was just serialized, I'll get errors.

Broken by default

[thanksforallthefish]

jackson is mainly based on java convention, isXXX is the default getter method name for boolean (thanks Jakub, stealing your edit), it should work with

listOf(
    Person(
        name = "foo",
        age = 44,
        fooBar = "lol",
        important = true,
        new = true
    )
)

[kqr]

I assume getter (and setter) convention in java world for boolean properties.

[thanksforallthefish]

another option you have a bad ObjectMapper configuration, how are you creating it @ursus? if you have something like

@Bean
fun objectMapper() = ObjectMapper()

you should amend that; my personal preference is to configure the mapper spring already creates for you, if you prefer to create a new one ensure kotlin module is configured

@Bean
fun objectMapper() = ObjectMapper().findAndRegisterModule()

/* or, but I prefer the above one since jackson will scan your classpath and is smart to configure what it needs
@Bean
fun objectMapper() = jacksonObjectMapper() //this is a kotlin extension funtion
*/

with a "correct" object mapper, isImportant and isNew work as you expect