purchase_discount/models/stock_move.py

# -*- encoding: utf-8 -*-
##############################################################################
#
#    This program is free software: you can redistribute it and/or modify
#    it under the terms of the GNU Affero General Public License as
#    published by the Free Software Foundation, either version 3 of the
#    License, or (at your option) any later version.
#
#    This program is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU Affero General Public License for more details.
#
#    You should have received a copy of the GNU Affero General Public License
#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
##############################################################################

from openerp import models, api


class StockMove(models.Model):
    _inherit = "stock.move"

    @api.model
    def _get_invoice_line_vals(self, move, partner, inv_type):
        res = super(StockMove, self)._get_invoice_line_vals(move, partner,
                                                            inv_type)
        if move.purchase_line_id:
            res['discount'] = move.purchase_line_id.discount
        elif move.origin_returned_move_id.purchase_line_id:
            res['discount'] = \
                move.origin_returned_move_id.purchase_line_id.discount
        return res