.Net: OpenAIPromptExecutionSettings.ResponseFormat breaks serialization #13107
Description
The property is documented to let you store a System.Type into it:
But System.Type is not JSON serializable. As such, anyone using that capability then breaks any scenario that depends on being able to serialize the PromptExecutionSettings, including AsChatCompletionService.
Repro:
using Microsoft.SemanticKernel.Connectors.OpenAI;
using System.Text.Json;
OpenAIPromptExecutionSettings s = new()
{
ResponseFormat = typeof(MyClass),
};
Console.WriteLine(JsonSerializer.Serialize(s));
class MyClass
{
public int MyProperty { get; set; }
}Output:
Unhandled exception. System.NotSupportedException: Serialization and deserialization of 'System.RuntimeType' instances is not supported. The unsupported member type is located on type 'System.Object'. Path: $.ResponseFormat.
---> System.NotSupportedException: Serialization and deserialization of 'System.RuntimeType' instances is not supported.
at System.Text.Json.Serialization.Converters.UnsupportedTypeConverter`1.Write(Utf8JsonWriter writer, T value, JsonSerializerOptions options)
at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter`1.TryWriteAsObject(Utf8JsonWriter writer, Object value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.Metadata.JsonPropertyInfo`1.GetMemberAndWriteJson(Object obj, WriteStack& state, Utf8JsonWriter writer)
at System.Text.Json.Serialization.Converters.ObjectDefaultConverter`1.OnTryWrite(Utf8JsonWriter writer, T value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter`1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
--- End of inner exception stack trace ---
at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& state, Exception innerException)
at System.Text.Json.Serialization.JsonConverter`1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.Metadata.JsonTypeInfo`1.Serialize(Utf8JsonWriter writer, T& rootValue, Object rootValueBoxed)
at System.Text.Json.JsonSerializer.WriteString[TValue](TValue& value, JsonTypeInfo`1 jsonTypeInfo)
at System.Text.Json.JsonSerializer.Serialize[TValue](TValue value, JsonSerializerOptions options)
at Program.<Main>$(String[] args)
Metadata
Metadata
Assignees
Type
Projects
Status