[BUG] Django Ninja's AsyncOperation blocks the response when using asyncio.create_task() or asyncio.ensure_future()

[c0dezli]

Describe the bug
Django Ninja's AsyncOperation blocks the response when using asyncio.create_task() or asyncio.ensure_future() in an async view. Even though these tasks are meant to run in the background, the operation waits for them to complete before sending the response.

Example code:

@router.post("/generate")
async def generate_daily_summary(request):
  logger.info("Starting tasks")
  asyncio.create_task(background_task_1())
  asyncio.create_task(background_task_2())
  logger.info("Tasks created") # This logs immediately
  return 200, None # Response is delayed until tasks complete

The issue appears to be in AsyncOperation.run() where it awaits the entire view function, including any background tasks created within it.

Versions

• Python version: 3.12
• Django version: 5.1
• Django-Ninja version: 1.3.0
• Pydantic version: 2.5.2

Proposed Solution
Add support for non-blocking background tasks, or consider adding a decorator or parameter to mark certain tasks as background operations that shouldn't block the response:

@router.post("/generate")
@background_tasks
async def generate_daily_summary(request):
    asyncio.create_task(background_task_1())
    asyncio.create_task(background_task_2())
    return 200, None

[c0dezli]

I’m kinda disappointed by this behavior and would appreciate some clarity. Could you help me understand if I’ve misunderstood something? It seems that this behavior simply defeat the purpose of using an async view.