How to To automatically save the admin user by default who updates a record in Django

To automatically save the ID of the admin user who updates a record in Django, you can override the save_model method of the admin class. Here's an example:

1. Open the file containing the admin class for your model, typically admin.py in your app directory.

2. Import the necessary modules:

from django.contrib import admin
from .models import YourModel

3. Create a new class that inherits from the default model admin:

class YourModelAdmin(admin.ModelAdmin)
: pass

4. Override the save_model method of the model admin class:

class YourModelAdmin(admin.ModelAdmin):
    def save_model(self, request, obj, form, change):
        if not obj.id:
            # New object is being created, set the admin user ID as the 
            default value
            obj.admin_user = request.user
        else:
            # Existing object is being updated, retain the existing admin user ID
            obj.admin_user_id = obj.admin_user_id
        obj.save()

In the above code, admin_user is the field in your model where you want to store the admin user ID. Adjust the field name accordingly.

5. Register the model with the modified admin class in the admin.py file:

admin.site.register(YourModel, YourModelAdmin)

That's it! Now, whenever an admin user creates a new record, the admin_user field will be automatically set to the ID of the admin user. When updating an existing record, the admin_user field will retain its existing value.

Make sure to restart your Django development server for the changes to take effect