I have an issue with ktor client on iOS where I get the foll

Question

I have an issue with ktor client on iOS where I get the following error ``` kotlin NotImplementedError An operation is not implemented Obtaining serializer from KClass is not available on native due to the lack of reflection Use serializer directly on serializable class at 0 mu51k ios 0x0000000108ff28a5 kfun kotlin Error lt init gt kotlin String kotlin Error + 21 at 1 mu51k ios 0x00000001090f8bd5 kfun kotlin NotImplementedError lt init gt kotlin String kotlin NotImplementedError + 21 at 2 mu51k ios 0x0000000109134802 kfun kotlinx serialization compiledSerializer kotlin reflect KClass lt GENERIC kotlin Any gt Generic + 226 at 3 mu51k ios 0x00000001091342c1 kfun kotlinx serialization serializer kotlin reflect KClass lt GENERIC kotlin Any gt Generic + 97 at 4 mu51k ios 0x000000010913e9b0 kfun kotlinx serialization modules getContextualOrDefault kotlinx serialization modules SerialModule kotlin reflect KClass lt GENERIC kotlin Any gt Generic + 144 at 5 mu51k ios 0x000000010913dbf8 ``` It s weird because the type response the API returns is indeed registered ``` actual val networkHttpClient HttpClient get = HttpClient install JsonFeature serializer = KotlinxSerializer apply setMapper CheckEmailResponse class CheckEmailResponse serializer setMapper AuthResponse class AuthResponse serializer setMapper ActionResponse class ActionResponse serializer ``` Does this error mean the http client doesn t know what to do with String Are we supposed to register simple types ourselves

galex · Answer

< sandwwraith> Hi what could be the reasons for the serialiser to fail although I did set up the correct class in iOS The network request looks like this ``` val address = Url $baseUrl $API $AUTH $CREATE GlobalScope launch backgroundDispatcher val result AuthResponse = url address toString body = TextContent Json stringify CreateAccountParameters email password reEnterPassword contentType = ContentType Application Json GlobalScope launch foregroundDispatcher block result ``` Any help would be greatly appreciated

Lawik · Answer

Does your response class contain generics

galex · Answer

Nope here is that class ``` Serializable data class AuthResponse val token String val userId Int = null ```

galex · Answer

< Lawik> < sandwwraith> Found the issue finally I used `Json stringify CreateAccountParameters email password reEnterPassword ` instead of `Json stringify CreateAccountParameters serializer CreateAccountParameters email password reEnterPassword ` Gosh that was a difficult one to find

galex · Answer

< Lawik> < sandwwraith> Will serializers always have to be defined manually for iOS Is there a planned enhancement where there is no need to do so

sandwwraith · Answer

Exception message contains phrase `Use serializer directly on serializable class ` or was it missing Unfortunately there is a very limited possibilities to enhance this since reflection is almost impossible on Native

galex · Answer

< sandwwraith> It was there indeed Was confused me in this case is that it was not on the receiving part but on the sending part when I called `Json stringify ` Understood so it s better to always use ` serializer` and if so better to do it in the common code already for all platforms correct

sandwwraith · Answer

Yes

galex · Answer

Cool thanks