eiru_sale_machine/models/mrp_production.py

# -*- encoding: utf-8 -*-

from openerp import models, api, fields

class MrpProduction(models.Model):
    _inherit = 'mrp.production'

    sale_id = fields.Many2one(
        comodel_name='sale.order', string='Sale order',
        readonly=True, store=True,
        related='move_prod_id.procurement_id.sale_line_id.order_id')
    sale_line_id = fields.Many2one(
        comodel_name='sale.order.line', string='Sale Line',
        related='move_prod_id.procurement_id.sale_line_id')
    mrp_machine_id = fields.Many2one(related='sale_line_id.mrp_machine_id',
        string='Maquina', store=True)
    partner_id = fields.Many2one(related='sale_id.partner_id',
        string='Customer', store=True)