eiru_car_services/model/proyect_car.py

# -*- coding: utf-8 -*-

from openerp import models, fields, api
from openerp.exceptions import except_orm, Warning, RedirectWarning

class CarCarModify(models.Model):
    _inherit = 'car.car'

    name = fields.Many2one('car.service', string='Nombre del vehiculo', required=True)
    agent_id = fields.Many2one('res.partner', string='Agente de Seguro')
    policy = fields.Boolean()

    @api.one
    @api.onchange('name')
    def onchange_name(self):
        self.partner_id = self.name.partner_id.id
        self.agent_id = self.name.agent_id.id
        self.policy = self.name.policy

    date_in = fields.Date('Fecha de entrada', default=fields.Date.today())
    date_out = fields.Date('Fecha de Salida')

    image_medium = fields.Binary('Binary File', related="name.logo")

    @api.multi
    def unlink(self):
        for project in self:
            if project.state in ('close'):
                raise Warning('No puedes borrar un proyecto en estado cerrado')
        return super(car_car, self).unlink()

    def on_change_vehicle(self):
        if not self.name:
            return {}
        model = self.pool.get('car.service').browse(self.name)
        return {
            'value': {
                'image_medium': model.logo,
            }
        }

class CarWorkshopModify(models.Model):
    _inherit = 'car.workshop'

    @api.multi
    def unlink(self):
        for task in self:
            if task.state in ('workshop_create_invoices'):
                raise Warning('No puedes borrar una tarea ya facturada')
        return super(car_workshop, self).unlink()