Describe the difference between synchronous and asynchronous views in Django. When would you use async def in a view?

 

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Difference Between Synchronous and Asynchronous Views in Django

In Django, views are responsible for handling requests and returning responses. Django supports both synchronous (def) and asynchronous (async def) views, especially since version 3.1+.

Synchronous Views (def)

Traditional and default way of writing views in Django.

Code executes sequentially, one line at a time.

Suitable for applications with simple logic and I/O-bound operations that don't require concurrency.

Example:

python

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def my_view(request):

    data = fetch_data_from_db()

    return HTTP Response(data)

Asynchronous Views (async def)

Introduced to support asynchronous programming using Python’s syn cio.

Enables non-blocking I/O operations, allowing the server to handle multiple requests efficiently.

Especially beneficial when working with:

External APIs

Long-running database queries

High  concurrency apps (e.g., chat apps, live feeds)

Example:

python

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async def my_view(request):

    data = await fetch_data_from_api()

    return HttpResponse(data)

When Would You Use async def in a View?

Use async def in Django views when:

You're calling external APIs or services that support asynchronous I/O.

You want to handle thousands of concurrent users efficiently.

Your application needs to be responsive and scalable, such as in chat apps, notification systems, or real-time dashboards.

You're working with Web Sockets or integrating Django with asynchronous frameworks.

However, it’s important to note that not all Django components are async-ready. Ensure any ORM or middleware you use supports async before adopting async def in views.

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