Updating values of recordset records

Business logic often requires us to update records by changing the values of some of their fields. This recipe shows you how to modify the date field of the partner as we go.

Getting ready

This recipe will use the same simplified library.book definition of the Creating new records recipe. You may refer to this simplified definition to find out about the fields.

We have the date_release field in the library.book model. For illustration purposes, we will write in this field with the click of a button.

How to do it...

1. To update a book's date_updated field, you can write a new method called change_update_date(), which is defined as follows:

   def change_release_date(self):
       self.ensure_one()
       self.date_release = fields.Date.today()

2. Then, you can add a button to the book's <form> view in xml, as follows:

   <button name="change_release_date" string="Update...