FastAPI 重定向到另一个带有数据的 url

如何解决FastAPI 重定向到另一个带有数据的 url

如何重定向到另一个包含数据的页面？从 FastAPI 文档中，我已阅读重定向到另一个 URL 必须使用 RedirectResponse()

@app.post('/update/{book_id}')
async def update_post(
    title = Form(...),author = Form(...),published_date = Form(...),isbn = Form(...),page_count = Form(...),preview_url = Form(...),publication_language = Form(...),book_id: int = 0,):  

try:
    book: Book = await Book.objects.get(id=book_id)
except ormar.exceptions.NoMatch:
    return status.HTTP_404_NOT_FOUND

await book.update(
    title=title,author=author,published_date=published_date,isbn=isbn,page_count=page_count,preview_url=preview_url,publication_language=publication_language
)

return RedirectResponse(url='/',status_code=status.HTTP_303_SEE_OTHER,headers={'message': 'Book has been successfully updated!'})

return RedirectResponse(url='/',headers={'message': 'Book has been successfully updated!'})

这没有用。我无法在我的 / 端点中读取此数据

 print(dict(request.__dict__['scope']['headers'])['message'])

给我 KeyError: 'message'