'properties' field is missing, empty or not an object.

[yidasanqian]

version:2.5.0

ref: https://github.com/openai/openai-java/blob/main/openai-java-example/src/main/java/com/openai/example/FunctionCallingExample.java

code:

 OpenAIClient client = OpenAIOkHttpClient.builder()
                .apiKey(environment.getProperty("OPENAI_API_KEY"))
                .baseUrl(environment.getProperty("OPENAI_BASE_URL"))
                .build();
        ChatCompletionCreateParams.Builder createParamsBuilder = ChatCompletionCreateParams.builder()
                .model(model)
                .maxCompletionTokens(4096)
                .addTool(BingWebSearchTool.class)
                .addUserMessage(query);

        client.chat().completions().create(createParamsBuilder.build()).choices().stream()
                .map(ChatCompletion.Choice::message)
                // Add each assistant message onto the builder so that we keep track of the
                // conversation for asking a follow-up question later.
                .peek(createParamsBuilder::addMessage)
                .flatMap(message -> {
                    message.content().ifPresent(System.out::println);
                    return message.toolCalls().stream().flatMap(Collection::stream);
                })
                .forEach(toolCall -> {
                    Object result = callFunction(toolCall.function());
                    // Add the tool call result to the conversation.
                    createParamsBuilder.addMessage(ChatCompletionToolMessageParam.builder()
                            .toolCallId(toolCall.id())
                            .contentAsJson(result)
                            .build());
                });

        // Ask a follow-up question about the function call result.
        createParamsBuilder.addUserMessage(query);
        client.chat().completions().create(createParamsBuilder.build()).choices().stream()
                .flatMap(choice -> choice.message().content().stream())
                .forEach(System.out::println);

exception:

java.lang.IllegalArgumentException: Local validation failed for JSON schema derived from class com.toowe.report.FunctionCallTest$BingWebSearchTool:
 - #: 'properties' field is missing, empty or not an object.

	at com.openai.core.StructuredOutputsKt.validateSchema(StructuredOutputs.kt:76)
	at com.openai.core.StructuredOutputsKt.extractFunctionInfo(StructuredOutputs.kt:124)
	at com.openai.core.StructuredOutputsKt.functionToolFromClass(StructuredOutputs.kt:149)
	at com.openai.models.chat.completions.ChatCompletionCreateParams$Builder.addTool(ChatCompletionCreateParams.kt:1553)
	at com.openai.models.chat.completions.ChatCompletionCreateParams$Builder.addTool$default(ChatCompletionCreateParams.kt:1550)
	at com.openai.models.chat.completions.ChatCompletionCreateParams$Builder.addTool(ChatCompletionCreateParams.kt)
	at com.toowe.report.FunctionCallTest.testBingWebSearch(FunctionCallTest.java:55)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)

How to fix?