old_contents: # -*- coding: utf-8 -*-
  ##############################################################################
  #
  #    OpenERP, Open Source Management Solution
  #    This module copyright (C) 2015 Therp BV <http://therp.nl>.
  #
  #    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/>.
  #
  ##############################################################################
  
  
  def migrate(cr, version):
      # if we end up here, we migrate from 7.0's account_banking
      # set transaction ids, taking care to enforce uniqueness
      cr.execute(
          """update account_bank_statement_line l set unique_import_id=l1.trans
          from (
              select distinct
              first_value(id) over (partition by trans) id, trans
              from account_bank_statement_line
          ) l1
          where l.id=l1.id""")
  
new_contents: # -*- coding: utf-8 -*-
  ##############################################################################
  #
  #    OpenERP, Open Source Management Solution
  #    This module copyright (C) 2015 Therp BV <http://therp.nl>.
  #
  #    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/>.
  #
  ##############################################################################
  
  
  def migrate(cr, version):
      if not version:
          return
      # if we end up here, we migrate from 7.0's account_banking
      # set transaction ids, taking care to enforce uniqueness
      cr.execute(
          """update account_bank_statement_line l set unique_import_id=l1.trans
          from (
              select distinct
              first_value(id) over (partition by trans) id, trans
              from account_bank_statement_line
          ) l1
          where l.id=l1.id""")
  
subject: migrate being called when version is None