Hey Leo,

You need to add two fields using studio.
1. x_studio_date_field : date field which will be compute
2. x_studio_no_of_days : integer field which will add the number of days to date field

Here, default x_studio_date_field - Today's date
x_studio_no_of_days - 0

You need to write the below compute method in x_studio_date_field field. You can access Properties and scroll down and click More. Further, you need to write the dependent field x_studio_no_of_days. So every time whenever you change the x_studio_no_of_days it will add to x_studio_date_field date.

for record in self:
record ['x_studio_date_field'] = datetime.datetime.now () + datetime.timedelta(days=record.x_studio_no_of_days)

Thanks & Regards,

Email: odoo@aktivsoftware.com

Skype: kalpeshmaheshwari