How to send email notification to the followers when the changement of state?
i'm using odoo 11 and i have develop a custom module which allow to employee to send an attendance modification request for their manager to approve their requests. In fact my request has 4 states draft, waiting for appouval ,approved or cancel. My problem is that i want that the followers recive email notification in every state modification. How can i do it ?Any idea for help ?