The problem is not with django, but with your mysql setup https://dev.mysql.com/doc/refman/8.0/en/gone-away.html One of the ways to solve it is to increase connection timeout in mysql configs

Thanks, but wouldn't increasing connection timeout just pospose the problem? The Django command is meant to be running forever. Plus, if as per the documentation, connection is closed after each statement, why does it reach timeout there?

> but wouldn't increasing connection timeout just pospose the problem tbh, I canno't say certenly. If you are using tcp or unix socket connection, those protocols are intended to create long living socket connections, as far as I know. > Plus, if as per the documentation, connection is closed after each statement Are you sure you are not missing connections with transactions?Django uses autocommit mode by default, yes. > default value is 0, preserving the historical behavior of closing the database connection at the end of each request Yes, but you said that the problem occurs during background task. As far as I understand, there are no http client-server request to those process, right? > I've also tried setting it to None and the result is the same. None means don't close from your side. But mysql server still can close the connection by its side.

Thanks, but wouldn't increasing connection timeout just pospose the problem? The Django command is meant to be running forever. Plus, if as per the documentation, connection is closed after each statement, why does it reach timeout there?

Or... you could manually close the connection in the task by your side https://stackoverflow.com/q/20058589/2516502 In [2]: Model.objects.count() Out[2]: 428674 In [3]: from django.db import connection In [4]: connection.close() In [5]: MOdel.objects.count() Out[5]: 428674

I've tried a similar thing: from django.db import close_old_connections close_old_connections(), but I guess it's not the same. I'll give it a try. Thanks!

Or you could create and emit your own signals for that. I don't have an instance of mysql to check that out. So it's just a hypothesis.

even if you don't have an instance of mysql thanks for the help, it's clear I'll need to twinkle the MySQL server settings to check if it's coherent with what's happening. I'll also check for a proper value for CONN_MAX_AGE. It's been hard to debug since the exception occurs each time after cca. 24 hours, so it's a change each time, but I hope I'll figure it out

<link rel="stylesheet" href="{% static 'style.css' %}" type="text/css">

Style.css file inside of static folder or inside of static/css/.... Like this

Hi! Somebody can explain why we need serializers? Kind of tough to understand in documentation.

Hi! Somebody can explain why we need serializers? Kind of tough to understand in documentation.

Now I got it, I appreciate your responses!

STATIC_URL = '/static/' hi, does this line of code mean we can open any static file(image) in new tab ? or i'm wrong

It should be STATIC_URL I guess

It specifies the base Url for all your static files

It specifies the base Url for all your static files

so, is STATIC_ROOT = os.path.join(BASE_DIR, 'static') is different ?

so, is STATIC_ROOT = os.path.join(BASE_DIR, 'static') is different ?

static Url just appends this url to the base url

you will you “static_root” in any kind of server

Please can anyone tell me differencies between library and framework? I am just confusing

https://stackoverflow.com/questions/148747/what-is-the-difference-between-a-framework-and-a-library#:~:text=A%20library%20performs%20specific%2C%20well,is%20done%20by%20the%20application.

Hey,can i use django to make a website where i can upload wallpaper and other can download it

yes bro. for fast deployment Django is the best.

ISSUE There is a Profile model which is connected to User model with OneToOneFIeld. When I delete a User instance I want to delete the Profile of the User too.

https://docs.djangoproject.com/en/3.2/ref/models/fields/#arguments Your probably need CASCADE

def when_user_deleted(sender, instance, **kwargs): instance.profile.delete() post_delete.connect(when_user_deleted, sender=User) I am using this simple signal to do this. But this is giving me the Annoying error: "User has no profile"

I only can advice to do as the documentation says. You are probably facing some data race because of db transactions.

Hello guys if I include cronjobs in my django application will it affect the working of my application when the scheduled job runs? (Assuming the application is hosted on heroku) or the Job gets executed on a different thread?

It will not

It will not

I was a bit hesitant because the job takes a few seconds to complete

You were hesitating for good. You actually DO can mess with your app by background tasks.

So is there any way to avoid issues?

Here we step in the field of knowledge called "concurrent programming". The biggest problem here is whether you have, so called, shared resources - anything you share with other process. Like memory or DB. Or maybe cache or smth else

Yes, the job is supposed to dump data in the database which the application uses

It's really hard to recommend you a single article for you could just read it and then just go. Concurrent programming is a difficult theme. In your case, if it's only DB, you could manage concurrent conditions, if there are any, with DB transactions. Here is one of my favorite articles https://hakibenita.com/how-to-manage-concurrency-in-django-models

I have a django project which using opencv-python Library When i tried to publish it to cpanel shared hosting, i had a problem on the opencv-python library, it couldn't build in the cpanel os So what i tried to do is build it manually in my local pc as 'whl' library, then install it in the cpanel It installed successfully but didn't work because of the 'Gun libc' version My local pc Gun libc version is 2.30, and the cpanel is 2.20 And because i build it in my pc it's built by the 2.3 gunlibc version Anybody know how to solve this problem, or anyway to install opencv-python on the cpanel os?!

Hi i want to upload huge file to server using django , the single file size can be max 1gb please anyone can help me on this ?

Hi i want to upload huge file to server using django , the single file size can be max 1gb please anyone can help me on this ?

Have you tried? Are you facing any problem with that?

Ofc he’ll face problems with that. The API will hangup or show timeout