Re: How to make Django Rest Apis Async

Hi Mrinal,

My DRF views usually send asynchronous tasks to celery or channel workers.

On Tue, Apr 21, 2020 at 4:38 AM Mrinal Kamboj <mrinal.technology@gmail.com> wrote:

Hello Everyone,

Following is my Django application configuration:

django = 2.2.11
djangorestframework = 3.9.2

Python = 3.8.2

I am exposing a set of rest apis for react js frontend, which connects to Postgres using a layered architecture views (controller) - services - data_layer. In data layer I fetch the data using Connection.Cursor, then transform the data fetched using cursor.fetchall.

By default the rest apis are synchronous apis, I am trying to find a way to make them Async, so that system scalability can be increased, otherwise every call will block the main thread.

I have tried the following options:

1. Using asyncio library, but I am unable to make the complete call chain Async. I generally get an error that expected return was Response / HttpResponse, but the method is returning Co-routine. I can find examples which contains running simple methods as async, but there's isn't an example of Django Rest API

2. Tried the following link, https://hackernoon.com/how-to-run-asynchronous-web-requests-in-parallel-with-python-3-5-without-aiohttp-264dc0f8546, which use the Threadpool executor to segregate every call on a thread in the controller itself, though the challenge is where to make the Asyncio call in the Main method as shown in the link, since these APIs are externally invoked.

3. Can aiohttp help, not sure, but if anyone has an example otherwise I have to resort to service broker design using an intermediary like Redis which in my view is unrequired complexity.

Any help / link on the topic would be appreciated.

Thanks,

Mrinal

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Regards,

Aldian Fazrihady
http://aldianfazrihady.com

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