Why async matters in Django - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to define an asynchronous view in Django.

Django

async def my_view(request):
    return [1]('Hello, async!')

Drag options to blanks, or click blank then click option'

AAsyncResponse

BHttpResponseAsync

CResponse

DHttpResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent async response class.

In Django, asynchronous views still return HttpResponse objects. The view function is marked with async, but the response class remains HttpResponse.

2fill in blank

medium

Complete the code to await an asynchronous database call in a Django async view.

Django

async def get_user(request):
    user = await User.objects.[1](id=1)
    return HttpResponse(user.username)

Drag options to blanks, or click blank then click option'

Afetch

Baget

Cget

Dget_async

Attempts:

3 left

💡 Hint

Common Mistakes

Using synchronous ORM methods inside async views.

Django's asynchronous ORM uses aget to fetch objects asynchronously. The normal get is synchronous and cannot be awaited.

3fill in blank

hard

Fix the error in the async view by choosing the correct way to call a synchronous function.

Django

async def sync_call_view(request):
    result = [1](sync_function)()
    return HttpResponse(result)

Drag options to blanks, or click blank then click option'

Aawait

Basync_to_sync

Csync_to_async

Drun_sync

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'async_to_sync' which is for the opposite direction.

To call a synchronous function inside an async view, Django provides sync_to_async to wrap the sync function so it can be awaited.

4fill in blank

hard

Fill both blanks to create an async view that fetches data and returns JSON response.

Django

from django.http import JsonResponse

async def data_view(request):
    data = await Model.objects.[1]().values().afetchall()
    return [2](data, safe=False)

Drag options to blanks, or click blank then click option'

Aall

BJsonResponse

Cfilter

DHttpResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Using synchronous ORM methods or wrong response classes.

To fetch all records asynchronously (Django 4.2+), chain all() with values() and await afetchall() to get a list of dictionaries. Use JsonResponse with safe=False to return JSON data for lists.

5fill in blank

hard

Fill all three blanks to write an async Django view that calls a sync function safely and returns its result.

Django

from asgiref.sync import [1]

async def combined_view(request):
    result = await [2](sync_func)()
    return [3](str(result))

Drag options to blanks, or click blank then click option'

Async_to_async

CHttpResponse

DJsonResponse

Attempts:

3 left

💡 Hint

Common Mistakes

Confusing sync_to_async with async_to_sync.

Using JsonResponse when returning plain text.

Import sync_to_async to wrap the synchronous function. Await the wrapped function call. Return the result using HttpResponse.