Hi everyone i have a problem i am using code from sources bu kotlinlang #server

Hi everyone, i have a problem, i am using code from sources but Ktor returns me not json of data class but just "null" any suggestions ? THX) http://prntscr.com/mobkfz

bdawg.io

02/22/2019, 6:08 AM

Are you sending

Accept: application/json

in your request to the server?

Right now, the only supported ContentNegotiation strategy when sending, is the client’s Accept header.

https://ktor.io/servers/features/content-negotiation.html

Бежан Александр

02/22/2019, 9:50 AM

http://prntscr.com/mok79t

yep here is a rest-client i'm using

if i put map there will be no problem, it will be serialized to json but if data class i still get null

bdawg.io

02/22/2019, 11:16 AM

You’re registering multiple handlers for gson. The

gson

builder is already registering a

GsonConverter

ContentType.Application.Json

, but you’re also registering a different converter via

register(Json, GsonConverter())

Бежан Александр

02/22/2019, 1:28 PM

http://prntscr.com/moni2v

http://prntscr.com/monijr

the same error ( everytime it's just return null except data class

also if i replace to User().toString() it will return toString somth wrong with gson conversion

may be for future i have found a solution, i just replaced gson to jackson and everything started. But for gson still no answer why it is so

bdawg.io

02/22/2019, 4:45 PM

I personally haven’t used gson to suggest anything in addition 😕

Бежан Александр

02/22/2019, 5:05 PM

nevertheless thx )

Spel98

03/15/2019, 11:42 AM

I had the same problem with Gson and a Json file that contain an array of Objects... in the end I had to create a custom serializer

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