How do we pass file ids in message creation on asssistants now?

[raysuelzer]

Library name and version

Azure.AI.OpenAI 2.0.0-beta.5

Query/Question

In the Azure.AI.OpenAI.Assistants we were able to do this to attach the file to the message. I can find no documentation on the new process as I see no way to reference file IDs in a user message:

        private async Task<ThreadMessage> CreateMessage(string userMessage, string[] fileIds, AssistantThread thread)
        {
            var messageResponse = await _client.CreateMessageAsync(thread, MessageRole.User, userMessage, fileIds);
            var message = messageResponse.Value;
            return message;
        }

Environment

.NET Core 8
Visual Studio 2022 Preview
Windows

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @jpalvarezl @ralph-msft @trrwilson.

[trrwilson]

Thank you for getting in touch, @raysuelzer!

You're absolutely right that this use of attachments with Assistants v2 and the new library is missing sample coverage at the moment; I'll ensure we get a work item filed to have the changes better documented.

As a direct answer, you can extend the pattern shown in this test code by using the Attachments property of MessageCreationOptions.

Here's a rough adaptation of the test to demonstrate:

[Test]
public void MessageWithAttachmentWorks()
{
    AssistantClient client = GetTestClient();

    FileClient fileClient = GetTestClient<FileClient>(TestScenario.Files);
    OpenAIFileInfo numbersFile = fileClient.UploadFile(
        BinaryData.FromString("""
        15
        20
        22
        12
        20
        """).ToStream(),
        "text/plain",
        FileUploadPurpose.Assistants);
    Validate(numbersFile);

    Assistant assistant = client.CreateAssistant(
        "gpt-4o",
        new AssistantCreationOptions()
        {
            Tools = { new CodeInterpreterToolDefinition() },
            ToolResources = new()
            {
                CodeInterpreter = new()
                {
                        FileIds = [numbersFile.Id],
                }
            }
        });

    AssistantThread thread = client.CreateThread();
    Validate(thread);

    ThreadMessage message = client.CreateMessage(
        thread.Id,
        MessageRole.User,
        content:
        [
            MessageContent.FromText("What's the standard deviation of the numbers in the attached file?"),
        ],
        new MessageCreationOptions()
        {
            Attachments =
            {
                new MessageCreationAttachment(
                    numbersFile.Id,
                    tools: [ new CodeInterpreterToolDefinition() ]),
            }
        });
    Validate(message);

    foreach (StreamingUpdate chunk in client.CreateRunStreaming(thread.Id, assistant.Id))
    {
        if (chunk is MessageContentUpdate contentUpdate)
        {
            Console.Write(contentUpdate.Text);
        }
    }
}

Which yields:

    It appears that the file contains a single column of numbers. To calculate the standard deviation of these numbers, we can proceed with the computation.The standard deviation of the numbers in the file is approximately \(4.43\).