Hi Badr, thank you for answering.

I cannot use different version of base addon. I have to solve it without that.

I just wondering how can I trigger _pivot_practical_amount_compute() method when I open pivot view or open budget page?

By the way, your linked account_budget giving error when installing it. Key error: group_id 

EDIT:

solution is;

I applied override approach here. Didn't work anything except override.

@api.multi

    def _compute_practical_amount(self):

        for line in self:

            result = 0.0

            acc_ids = line.general_budget_id.account_ids.ids

            date_to = self.env.context.get('wizard_date_to') or line.date_to

            date_from = self.env.context.get('wizard_date_from') or line.date_from

            if line.analytic_account_id.id:

                self.env.cr.execute("""

                        SELECT SUM(amount)

                        FROM account_analytic_line

                        WHERE account_id=%s

                            AND (date between to_date(%s,'yyyy-mm-dd') AND to_date(%s,'yyyy-mm-dd'))

                            AND general_account_id=ANY(%s)""",

                                    (line.analytic_account_id.id, date_from, date_to, acc_ids,))

                result = self.env.cr.fetchone()[0] or 0.0

                line.practical_amount = result

            self.env.cr.execute("""

                    UPDATE crossovered_budget_lines 

                    SET pivot_practical_amount=%s

                    WHERE id=%s

                """, (result, self._ids[0]))