Hello,

Suppose I have two Float fields and a date field:

num = fields.Float('Number')
sum_num = fields.Float('Sum all values of the num field')

time_num = fields.Date('Time')

I created the first record and put value: 1.0 in the num field;
num = 1.0
and selected time_num field is :01/01/21 for Ex

and want the result in the sum_num field is 1.0
sum_num = 1.0

Then I created the second record and put value: 2.0 in the num field ;
num = 2.0

and selected time_num field is :01/02/21

and want the result in the sum_num field is 3.0 ;
sum_num = 3.0

And when I create the third record and put value: 3.0 in the num field:
num = 3.0

But I selected for time_num field is : 02/01/21

Then I want the result is : 3.0
sum_num : 3

and so on...

I'd tried to used compute field like this:

sum_num = fields.Float(compute='_sum_num', string='Sum all values of all records of sum field')

@api.depends('num')
def _sum_num(self):
     rec_sum = sum(self.search([]).mapped('num')
     for rec in self:
          rec.sum_num = rec_sum

The compute method working fine but I don't know how to execute it based on the selected month!

Please help!
Thank you!