An Example of Celery in a Flask App With Multiple Files

Get Celery working in a Flask app that uses the application factory pattern to avoid any issues with importing the Celery tasks into your app.
WORK WITH ME👇🏼
✅ Implement features and fix bugs in your app: Live, one-on-one screenshare
prettyprinted....
💻 Code written in video
prettyprinted....

[@ТимурКотов-о4е]

thank you so much bro Its pretty hard to get how flask works with it's contexts and flask app extensions. You've helped me a lot Also need to say that celery_init_app function in flask docs changed and now you don't need write app.set_default() in __init__.py. It's already in celery_init_app function

[@КонстантинСавин-к2я]

Great video! I think if we move adding user to database after for loop, we can actually cancel adding user to the database.

[@prettyprinted]

Yup that's definitely a possibility. Thanks for watching!

[@iTaLiAnRoCkErA7X]

I am attempting to run your example on my local machine. I keep getting an error when I enter "docker compose up" in the terminal. The flask & celery parts exit with code 1 & code 2 both stating "AttributeError: 'cached property' object has no attribute 'lock' ". Im not sure where to look to fix this as it doesn't seem to show up anywhere on google.

[@abraham_o]

🌹 I love your approach. But please can you like provide a little bit of reference to a standalone queue with celery, without having to bind it to flask.

[@jesterlw]

New subscriber here. I've been watching a lot of your videos on flask from 5+ years ago. I really appreciate it. Keep up the good work!

[@AlexanderFraser-dk6sc]

Do you need to pass self?

[@jijojoseph2041]

there were couple of things you have mentioned while working with flask. if we were to use fastapi , are these things still applies, like the context and all?

[@ElieTAILLARD]

Is it possible to start the project without docker ?

[@TomiHakkarainen]

Totally possible you could deploy flask, celery and sqlite running without Docker, in the old school way, no prob. Just run the apps directly on your server where you have the code 😊

[@karldeskolas]

Hey Man, you seem like you know your stuff! I sure dont! Which is why im wondering, has anyone here or you directly ever tried emitting signals with flask-socketio from a external celery worker process? I cannot figure out how this should work, quite the noob ngl...

[@alexdin1565]

please can you add videos about django celery and ajax

[@prettyprinted]

This video might be useful: kzbin.info/www/bejne/eJOzpKp_ptNljKs

[@marko90000]

that thing sleep 45 seconds learn mathematics anthony.

[@arturkabitcher]

Awesome content!

[@prettyprinted]

Thanks for watching!

[@kedychang]

Really help to understand celery with flask, thanks for your video.

[@terrencemoore8739]

This was the video i needed! Thank you! All celery videos are super simple since kost people watching them are noobs but a lot of us are working on real projects and the documentation does not explain whats going wrong.

[@buxA57]

hello, i cant see print statement that is inside of shared task when i call it edit: it seems to be problem with delay() task is recieved but not executed, if i change delay to run it works. Still dont know how to make delay work edit2: adding ' -P solo' to 'celery -A run worker --loglevel INFO -P solo' fixed the issue

[@agb2557]

Ahhh I could've done with this video sooner lol, I ended up hacking together my own background task implementation with redis and rabbit (Really struggled to make celery work with the factory pattern) I think I'll revert to using celery with your implementation as its way more robust, thanks!

[@_letsBug]

Thankyou soo much

[@eddwinnas]

90% of example are too simple ty for this

[@yomajo]

Half year ago tried celery to work with app factory, gave up eventually, went with rq... Need simple compute in the background, uses separate app instance, but at least have no weirdness like celery does, e.g. returning app, celery from main factory function...

[@SomethingRandomChannel]

Awesome man thank you

[@eduardmart1237]

Can you explain flasks contexts especially with celery?

[@DanielObregon201087]

HI! How I can load .env file in celery?

[@bernardhuxley5984]

Great Content!

[@langoonasse771]

I currently have a bug we’re whenever two users login to my flask app and refresh a few time s the other users information gets displayed. When I comment out all clergy code everything works fine. Any idea what’s going on?

[@prettyprinted]

You may have to down Flask-Login to 0.6.1. There's an issue with the newest version.

[@squabble3332]

no git link code not work link to example not working too GL for any who search flask example

[@prettyprinted]

The code is here: github.com/PrettyPrinted/youtube_video_code/tree/master/2023/01/27/An%20Example%20of%20Celery%20in%20a%20Flask%20App%20With%20Multiple%20Files

[@squabble3332]

@@prettyprinted thx man, i have a great an important note for those who find a celery working example with WINDOWS if u starting celery and all of ur tasks are PENDING, that u must change in confinguration _________________ task_ignore_result=False, track_started=True ________________ AND add the flag into celery start script ________________ celery -A worker -P solo >>>>[ WARN HERE -P solo] ________________ and now ur tasks succesfully performs