numberfisico_unique/numberfisico_unique.py

# -*- coding: utf-8 -*-
##############################################################################
#
#    OpenERP, Open Source Management Solution
#    Copyright (C) 2004-2010 Tiny SPRL (<http://tiny.be>).
#
#    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
from openerp.exceptions import ValidationError

class sale_order(models.Model):
    _name = 'sale.order'
    _inherit = 'sale.order'

    @api.one
    @api.constrains('invoice_number')
    def _controla_ruc(self):

        if (self.invoice_number):
        # if not (self.invoice_number is None):
            part_obj = self.env['sale.order'].search([('invoice_number','=',self.invoice_number)])
            if len(part_obj) > 1:
                raise ValidationError('El campo número de factura física ya existe y debe ser único')