account_move_line.py

# -*- coding: utf-8 -*-
# (c) 2015 Pedro M. Baeza
# License AGPL-3 - See http://www.gnu.org/licenses/agpl-3.0.html
from odoo import api, models


class AccountMoveLine(models.Model):
    _inherit = 'account.move.line'

    @api.multi
    def _prepare_analytic_line(self):
        res = super(AccountMoveLine, self)._prepare_analytic_line()
        res[0]['other_partner_id'] = \
            self.invoice_id.partner_id.commercial_partner_id.id
        return res