Is there a function that can be used to get and check the data every time a specified menu is loaded/opened?

I have 1 field in the appointment module (time). What I want is when I open the appointment menu, a function will try to get/check all the data in appointment, then later the time field will be filled in according to the code I have made. So every time I open the appointments menu, odoo will check the existing data, and the time field data can be updated.

@api.model
    def fields_view_get(self, view_id=None, view_type='form', toolbar=False, submenu=False):
        res = super(MyMenu, self).fields_view_get(view_id=view_id, view_type=view_type, toolbar=toolbar, submenu=submenu)
        data = self.env['appointment.appointment'].search([])
        for record in data:
            app = self.env['appointment.time'].search([('time1','<=',record.time),('time2','>=',record.time)], limit=1)
            if duration:
                record.time_final= app.name + "o'clock"
        return res

I have tried the code above, but it only runs 1 time (when I restarted the odoo server).