hello try this

   @api.onchange('dob')

   @api.depends('dob')

     def onchange_age_calculate(self):

      if not self.dob:

       self.age = 0

     else:

      today_date = datetime.datetime.now().year

      date_split = self.dob.split('-',1)

      birth_year = date_split[0]

      self.age = today_date -int(birth_year)

      name=  fields.Char(string="Name"), 

      dob' = fields.Date('Date of Birth'),

      age= fields.Float( string='Age')

then replace your class like this

class your_class_name(models.Model):

Thanks and I hoped i help you.

Anand,

As axel said you cant store readonly values in DB, i got some workout around it to do that..

To store readonly values also in future, u can have a little modification at your js part:

at wed/static/src/js/views/view_form.js        under FormView class, at method '_process_save()'

approx at line# 873, under "else if (f.name !== 'id' && (!self.datarecord.id || f._dirty_flag))"

replace the code with below one....

else if (f.name !== 'id' && (!self.datarecord.id || f._dirty_flag)){

//commenting below lines to allow sotring readonly values also

// if (!f.get("readonly")) {

               // values[f.name] = f.get_value(true);

    // } else {

            // readonly_values[f.name] = f.get_value(true);

    // }

    values[f.name] = f.get_value();

     if (f.get("readonly"))

            readonly_values[f.name]= f.get_value();

}

Hope this will help you

# Specify below header file in your code:

from datetime import datetime

from dateutil import relativedelta as rdelta

from datetime import date

#create a two field in your py file

staff_dob = fields.Date(string="Date of Birth")

staff_age = fields.Integer(string="Age")

# We can use onchange method in my staff_dob field .

@api.onchange('staff_dob')

def age_cal_fun(self):

if self.staff_dob:

today = date.today()

bdate = datetime.strptime(self.staff_dob, '%Y-%m-%d')

rd = rdelta.relativedelta(today, bdate)

self.staff_age = rd.years

#Above this code is help for you