eiru_service/models/product_service.py

# -*- encoding: utf-8 -*-
from openerp import models, fields, api, tools
from openerp.exceptions import ValidationError

class ProductService(models.Model):
    _name = 'product.service'

    name=fields.Char(string='Nombre', compute='_get_product_name', store=True)
    model=fields.Char(string='Modelo')
    year=fields.Integer(string='Año')
    number=fields.Char(string='Número')
    logo = fields.Binary(string='Logo File')
    partner_id = fields.Many2one(
        'res.partner',
        string='Cliente',
        ondelete='restrict'
    )
    description = fields.Text(string='Description')
    valuation = fields.Float(string='Valor')
    product_service_brand_id = fields.Many2one(
        'product.service.brand',
        string='Marca'
    )

    @api.one
    @api.constrains('number')
    def _controla_numero(self):
        part_obj = self.env['product.service'].search([('number','=',self.number)])
        if len(part_obj) > 1:
            raise ValidationError('La numero debe ser unico')

    @api.one
    @api.depends('product_service_brand_id','model','number')
    def _get_product_name(self):
        self.name = self.product_service_brand_id.name + ' / ' +  self.model + ' / ' + self.number