[Android] Cannot deserialize readonly or fixed size dictionary

[ArnaudC2Care]

Hi,

I’m using CreateResponseRequest with variables. In the editor, everything works fine:

var request = new CreateResponseRequest(
    input: conversation,
    model: Model.GPT4_1_Nano,
    prompt: new Prompt("pmpt_abc123", new Dictionary<string, object>
    {
        { "customer_name", "Jane Doe" },
        { "product", "40oz juice box" }
    }));
var response = await OpenAIClient.ResponsesEndpoint.CreateModelResponseAsync(request);

However, when I build the app for Android, I get the following error:

Request failed : Cannot deserialize readonly or fixed size dictionary:
System.Collections.Generic.IReadOnlyDictionary`2[System.String,System.Object].
Path 'prompt.variables.customer_name'

[ArnaudC2Care]

I followed this issue: https://github.com/RageAgainstThePixel/com.openai.unity/issues/147
and fixed it by adding a link.xml file to my project:

<linker>
  <assembly fullname="Newtonsoft.Json">
    <type fullname="Newtonsoft.Json.Serialization.DefaultContractResolver" preserve="all"/>
    <type fullname="Newtonsoft.Json.Converters.*" preserve="all"/>
  </assembly>
  <assembly fullname="System.ObjectModel">
    <type fullname="System.Collections.ObjectModel.ReadOnlyDictionary`2" preserve="all"/>
  </assembly>
</linker>