old_contents: # -*- coding: utf-8 -*-
  ##############################################################################
  #
  #    Author: Joel Grand-Guillaume
  #    Copyright 2011-2012 Camptocamp SA
  #
  #    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.osv.orm import Model, fields
  
  
  class AccountVoucher(Model):
      
      _inherit = 'account.voucher'
  
      def _get_period(self, cr, uid, context=None):
          """If perdiod not in context, take it from the move lines"""
          if context is None: context = {}
          if not context.get('period_id') and context.get('move_line_ids'):
              res = self.pool.get('account.move.line').browse(cr, uid , context.get('move_line_ids'))[0].period_id.id
              context['period_id'] = res
          return super(AccountVoucher, self)._get_period(cr, uid, context)
  
      def create(self, cr, uid, values, context=None):
          """If no period defined in values, ask it from moves."""
          if values.get('period_id') == False and context.get('move_line_ids'):
              values['period_id'] = self._get_period(cr, uid, context)
          return super(AccountVoucher, self).create(cr, uid, values, context)
  
  
new_contents: # -*- coding: utf-8 -*-
  ##############################################################################
  #
  #    Author: Joel Grand-Guillaume
  #    Copyright 2011-2012 Camptocamp SA
  #
  #    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.osv.orm import Model, fields
  
  
  class AccountVoucher(Model):
  
      _inherit = 'account.voucher'
  
      def _get_period(self, cr, uid, context=None):
          """If period not in context, take it from the move lines"""
          if context is None:
              context = {}
          if not context.get('period_id') and context.get('move_line_ids'):
              res = self.pool.get('account.move.line').browse(cr, uid , context.get('move_line_ids'))[0].period_id.id
              context['period_id'] = res
          elif context.get('date'):
              periods = self.pool.get('account.period').find(
                      cr, uid, dt=context['date'], context=context)
              if periods:
                  context['period_id'] = periods[0]
          return super(AccountVoucher, self)._get_period(cr, uid, context)
  
      def create(self, cr, uid, values, context=None):
          """If no period defined in values, ask it from moves."""
          if context is None:
              context = {}
          if not values.get('period_id'):
              ctx = dict(context, date=values.get('date'))
              values['period_id'] = self._get_period(cr, uid, ctx)
          return super(AccountVoucher, self).create(cr, uid, values, context)
  
  
subject: use period of voucher date when no period is found (lp:c2c-financial-addons/6.1 rev 24.1.45)