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Fix for "No CallAdvisors available to execute" Error

Problem

The error "No CallAdvisors available to execute" was occurring when calling OpenAI API endpoints because the ChatClient.Builder was being used without configuring the underlying chat model.

Root Cause

When creating a ChatClient from ChatClient.Builder, the builder needs to have access to the actual chat model (like OpenAiChatModel) to execute the API calls. The advisor chain requires a model at the end of the chain to make the actual call to OpenAI.

Solution Applied

Changed all controllers to use ChatClient.builder(openAiChatModel) instead of injecting ChatClient.Builder without a model.

Files Modified

  1. ChatController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  2. AdvisorsChatController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  3. PromptController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Added import for OpenAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  4. StreamController.java

    • Changed constructor from ChatClient.Builder builder to OpenAiChatModel openAiChatModel
    • Added import for OpenAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  5. TravelAssistantController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Added import for OpenAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  6. PromptTypesController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Added import for OpenAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  7. PromptInjectionController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Added import for OpenAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  8. StructuredOutputsController.java

    • Changed constructor from ChatClient.Builder chatClientBuilder to OpenAiChatModel openAiChatModel
    • Added import for OpenAiChatModel
    • Updated to use ChatClient.builder(openAiChatModel).build()

  9. ToolCallingController.java

    • Changed constructor to remove ChatClient.Builder builder parameter
    • Updated to use ChatClient.builder(openAiChatModel).build()

How to Test

  1. Restart your Spring Boot application
  2. Call any of the OpenAI endpoints (e.g., /springai/v1/chats, /springai/v1/advisors)
  3. The "No CallAdvisors available to execute" error should no longer appear
  4. You should receive proper responses from the OpenAI API

Pattern to Follow for Future Controllers

When creating new controllers that use ChatClient, always inject the model directly:

@RestController
public class MyController {
    private final ChatClient chatClient;

    public MyController(OpenAiChatModel openAiChatModel) {
        this.chatClient = ChatClient.create(openAiChatModel);
    }
}

Do NOT use:

// ❌ INCORRECT - Will cause "No CallAdvisors available to execute" error
public MyController(ChatClient.Builder chatClientBuilder) {
    this.chatClient = chatClientBuilder.build();
}