``` Serializable class SomeRequestBody SerialName name field

Question

``` Serializable class SomeRequestBody SerialName name field val name String ``` In KTOR Server I have defined EP with such a request body The problem is that it works if json looks like ``` name some name string ``` but does not work if im trying to do the same with ``` name field some name string ``` Do you know how to fix it P S Content negotiation is enabled in application module like ```install ContentNegotiation gson setPrettyPrinting ``` Thank you in advance

jorge.rego · Answer

AFAIK if you use content negotiation you don t need to use serializable This means you can expect your json to have a name field not a name field field Do you really need to have a body with name field

savrov · Answer

Yeah i have more complex names like `date something` but i dont want to use an underscore in source code

jorge.rego · Answer

yep I understand Not sure how content negotiation feature works behind the scenes but gson will work in its way and you are using Serializable in your annotations They are different content negotiation options Can you try the following ```install ContentNegotiation serialization ```

jorge.rego · Answer

Also Gson includes a way to change the serialized name but the annotation is not SerialName you need to use SerializedName <https www javadoc io doc com google code gson gson 2 6 2 com google gson annotations SerializedName html>

jorge.rego · Answer

Sorry didn t realise the annotation could be wrong If you change it to the one I ve written in my previous comment you should be able to use Gson as you did before in content negotiation

savrov · Answer

Great thank you very much You gave me an idea since i have models defined in mpp module of what I m doing wrong first of all i ll switch from `gson` to `kotlinx serialization` then i should to write a custom serializer for my ApiResponse lt T gt It looks a bit tricky but will give a try

savrov · Answer

Now I m trying to serialize a generic class `ApiResponse lt T gt ` with `kotlinx serialization` So i ve created a `ApiResponseSerializer` class with help of But now i don t understand how to use that serializer since none of doesn t seem to suit to me That is the place where i need a help My ApiResponse lt T gt is defined like ```data class ApiResponse lt T gt val data T = null val error ApiError = null ``` And the regular usage in KTOR is ```respond HttpStatusCode Created ApiResponse data = response data ``` I don t know where i can attach my serializer to `data` field of my `ApiResponse` class Thank you in advance

jorge.rego · Answer

What I would do here is to use Gson and annotate fields with this <https www javadoc io doc com google code gson gson 2 6 2 com google gson annotations SerializedName html> This should work without writing any serializer unless you need to serialize complex data And when installing content negotiation you can configure it in case you need it ```install ContentNegotiation gson HERE YOU ARE CONFIGURING YOUR SERIALIZER setPrettyPrinting ```

savrov · Answer

but gson is not multiplatform so i can not use it in my mpp module

savrov · Answer

so i need to use a kotlinx serialization

jorge.rego · Answer

ah ok then I said nothing

savrov · Answer

but still u were helpfull like a batman