old_contents: # -*- coding: utf-8 -*-
  ##############################################################################
  # For copyright and license notices, see __openerp__.py file in module root
  # directory
  ##############################################################################
  from openerp import models, fields
  import logging
  _logger = logging.getLogger(__name__)
  
  
  class account_journal(models.Model):
      _inherit = "account.journal"
  
      voucher_amount_restriction = fields.Selection([
          ('cant_be_cero', "Can't be 0"),
          ('must_be_cero', 'Must Be 0')],
          'Voucher Amount Restriction',
          default='cant_be_cero',
          )
  
new_contents: # -*- coding: utf-8 -*-
  ##############################################################################
  # For copyright and license notices, see __openerp__.py file in module root
  # directory
  ##############################################################################
  from openerp import models, fields
  import logging
  _logger = logging.getLogger(__name__)
  
  
  class account_journal(models.Model):
      _inherit = "account.journal"
  
      voucher_amount_restriction = fields.Selection([
          ('cant_be_cero', "Can't be 0"),
          ('must_be_cero', 'Must Be 0')],
          'Voucher Amount Restriction',
          # default='cant_be_cero',
          )
  
subject: FIX no default restriction