Subtract Two Fields From Django Admin

How do i subtract the two field values from django admin. here i gave my views and templtaes views.py for attendancesheet_info in attendance_sheet: attendancesheet_info.present_da

Solution 1:

You can calculate it in a class method in the model and reference that method in the admin as a read-only field in an edit view or list view in admin.py.

# this method goes into your model.@propertydefpresent_days(self):
    returnself.working_days - self.leave_days

Your example template will also work. You don't need to do anything in the view to access present_days. The code in your question from views.py is not needed.

<td>{{ attendancesheet_info.present_days}}</td>

Solution 2:

Assuming you have a model like AttendanceSheet defined in your models.py, you can create a ModelAdmin for this model in admin.py and specify the fields you want to appear on the admin page.

See the official documentation related to this topic, especially the exclude option.