UploadFile optional with multiple parameters to API

[varshanasi]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the FastAPI documentation, with the integrated search.
• I already searched in Google "How to X in FastAPI" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to FastAPI but to Pydantic.
• I already checked if it is not related to FastAPI but to Swagger UI.
• I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

• I commit to help with one of those options 👆

Example Code

@app.post("/search/")
async def search_similarity(query: str, file: UploadFile | None = None):
    try:
        file_content = ""
        if file:
            # Save the file
            file_path = await save_file(file)

            # Compute file hash
            file_hash = await compute_file_hash(file)
        return file_hash
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Error: {str(e)}")

Description

Open the browser and expected to see an UploadFile option:

Expected to see the above with the image being optional but got the following instead:

My python version was 3.0+ but also tried methods mentioned for other methods but still obtained same output with empty textbox

Operating System

Windows

Operating System Details

No response

FastAPI Version

0.111.0

Pydantic Version

2.7.3

Python Version

3.10.12

Additional Context

No response

[JavierSanchezCastro]

Check #11356 (comment) #10912 (reply in thread)