Implementing a custom management command

Using Django Mystery Errors
1

As I was required to implement a custom management command in my project, I tried to create a dummy command as part of learning. When I executed the custom management command I created, I got the result twice…

My folder structure looks like this

training/
    __init__.py
    management/
        __init__.py
        commands/
            __init__.py
            custom_management.py

Here’s the custom management command I’ve created


from django.core.management.base import BaseCommand


class Command(BaseCommand):
    """
    Creates a custom command for updating the previous assessment records
    """

    help = "Updates the assessments recordes in a SubBatch"

    def add_arguments(self, parser):
        """
        This function is responsible for adding arguments to the command
        """
        parser.add_argument("--list_a", nargs="*", type=int)
        parser.add_argument("--int_x", type=int, default=0)

    def handle(self, *args, **kwargs):
        """
        Create records based on the given scenario
        """
        x = sum(kwargs["list_a"])
        y = kwargs["int_x"]
        add = x + y
        return self.stdout.write(
                self.style.SUCCESS('Sum of the values "%i"' % add)
            )

When I tried to execute the command, this is the result I got

Screenshot 2023-09-27 at 5.29.49 PM
Screenshot 2023-09-27 at 5.29.49 PM2032×200 16 KB

Can someone explain to me why the result is returned twice?
Also when I try to run my testcases, it gets executed twice…
Thanks in advance

2

I’ve copy pasted your code and run in my project and it works fine in my existing project as you can see in below screenshot.

image
image959×100 14.4 KB

In this below folder structure base refers to my app name.

base
├── __init__.py
├── management
│   ├── commands
│   │   ├── custom_management.py
│   │   ├── __init__.py
│   ├── __init__.py

Also I removed return from here

        return self.stdout.write(
            self.style.SUCCESS('Sum of the values "%i"' % add)
        )

and used this and still works

        self.stdout.write(
            self.style.SUCCESS('Sum of the values "%i"' % add)
        )
3

Yeah, this will not raise any issue in normal circumstances. But somehow I’m facing this issue in my project am I missing something in my project?
This is not the only issue, when I execute my test cases, it gets executed twice
Similarly for makemigrations and migrate commands also

Screenshot 2023-09-27 at 7.02.48 PM
Screenshot 2023-09-27 at 7.02.48 PM1960×380 45.2 KB

4

That looks to me like you’ve either got a badly-modified manage.py command or a user-written python script that is running things twice.

I also see where you’re apparently not using a virtual environment - is this work being done in a docker container?

5

Thanks for the help, I found the issue. Yes, I’ve previously modified the manage.py file and changed it back to normal.

Yes, this has been executed in the docker container…
I use conda for creating an environment.