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
  from openerp.osv import fields
  
  
  class account_move(Model):
      _inherit = 'account.move'
  
      def unlink(self, cr, uid, ids, context=None):
          """
          Delete the reconciliation when we delete the moves. This
          allow an easier way of cancelling the bank statement.
          """
          for move in self.browse(cr, uid, ids, context=context):
              for move_line in move.line_id:
                  if move_line.reconcile_id:
                      move_line.reconcile_id.unlink(context=context)
          return super(account_move, self).unlink(cr, uid, ids, context=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
  from openerp.osv import fields
  
  
  class account_move(Model):
      _inherit = 'account.move'
  
      def unlink(self, cr, uid, ids, context=None):
          """
          Delete the reconciliation when we delete the moves. This
          allow an easier way of cancelling the bank statement.
          """
          reconcile_to_delete = []
          reconcile_obj = self.pool.get('account.move.reconcile')
          for move in self.browse(cr, uid, ids, context=context):
              for move_line in move.line_id:
                  if move_line.reconcile_id:
                      reconcile_to_delete.append(move_line.reconcile_id.id)
          reconcile_obj.unlink(cr, uid, reconcile_to_delete, context=context)
          return super(account_move, self).unlink(cr, uid, ids, context=context)
  
subject: remove account.reconcile before deleting a account.move