old_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    OpenERP, Open Source Management Solution
  #    Copyright (C) 2004-2010 Tiny SPRL (<http://tiny.be>).
  #
  #    ThinkOpen Solutions Brasil
  #    Copyright (C) Thinkopen Solutions <http://www.tkobr.com>.
  #
  #    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 odoo import models, fields, api, _
  
  
  class PurchaseOrder(models.Model):
      _inherit = 'purchase.order'
  
      @api.multi
      def _prepare_invoice(self):
          result = super(PurchaseOrder, self)._prepare_invoice()
          result.update({'reference_coexiste': self.partner_ref})
          return result
  
      @api.multi
      def action_view_invoice(self):
          result = super(PurchaseOrder, self).action_view_invoice()
          if not self.invoice_ids:
              result['context'].update({'default_fiscal_position_id': self.fiscal_position_id.id,
                                        'default_reference_coexiste': self.partner_ref,
                                        'default_payment_term_id': self.payment_term_id.id,
                                        })
          return result
  
new_contents: # -*- encoding: utf-8 -*-
  ##############################################################################
  #
  #    OpenERP, Open Source Management Solution
  #    Copyright (C) 2004-2010 Tiny SPRL (<http://tiny.be>).
  #
  #    ThinkOpen Solutions Brasil
  #    Copyright (C) Thinkopen Solutions <http://www.tkobr.com>.
  #
  #    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 odoo import models, fields, api, _
  
  
  class PurchaseOrder(models.Model):
      _inherit = 'purchase.order'
  
      @api.multi
      def _prepare_invoice(self):
          result = super(PurchaseOrder, self)._prepare_invoice()
          result.update({'reference_coexiste': self.partner_ref,
                         'issuer': '0'})
          return result
  
      @api.multi
      def action_view_invoice(self):
          result = super(PurchaseOrder, self).action_view_invoice()
          if not self.invoice_ids:
              result['context'].update({'default_fiscal_position_id': self.fiscal_position_id.id,
                                        'default_reference_coexiste': self.partner_ref,
                                        'default_payment_term_id': self.payment_term_id.id,
                                        })
          return result
  
subject: update issuer in supplier invoice