# -*- coding: utf-8 -*- from odoo import api, fields, models, _ class AccountMoveLine(models.Model): _inherit = 'account.move.line' followup_line_id = fields.Many2one('followup.line', 'Follow-up Level') followup_date = fields.Date('Latest Follow-up') result = fields.Float(compute='_get_result', string="Balance Amount") def _get_result(self): for aml in self: aml.result = aml.debit - aml.credit