old_contents: # -*- coding: utf-8 -*-
  # Author: Andrea andrea4ever Gallina
  # Author: Francesco OpenCode Apruzzese
  # Author: Ciro CiroBoxHub Urselli
  # Copyright 2016 Camptocamp SA
  # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
  
  from openerp import models, fields, api, _
  from openerp.exceptions import Warning as UserError
  from datetime import datetime
  
  
  class OpenInvoiceWizard(models.TransientModel):
  
      _name = 'open.invoice.wizard'
  
      company_id = fields.Many2one(
          'res.company', required=True,
          default=lambda s: s.env.user.company_id)
      at_date = fields.Date(
          required=True,
          default=fields.Date.to_string(datetime.today()))
      partner_ids = fields.Many2many(
          'res.partner', comodel_name='res.partner',
          string='Filter partners',)
      amount_currency = fields.Boolean(
          "With Currency", help="It adds the currency column")
      group_by_currency = fields.Boolean(
          "Group Partner by currency", help="It adds the currency column")
      result_selection = fields.Selection([
          ('customer', 'Receivable Accounts'),
          ('supplier', 'Payable Accounts'),
          ('customer_supplier', 'Receivable and Payable Accounts')],
          "Partner's", required=True, default='customer')
      target_move = fields.Selection([
          ('posted', 'All Posted Entries'),
          ('all', 'All Entries')], 'Target Moves',
          required=True, default='all')
      until_date = fields.Date(
          "Clearance date", required=True,
          help="""The clearance date is essentially a tool used for debtors
          provisionning calculation.
          By default, this date is equal to the the end date (
          ie: 31/12/2011 if you select fy 2011).
          By amending the clearance date, you will be, for instance,
          able to answer the question : 'based on my last
          year end debtors open invoices, which invoices are still
          unpaid today (today is my clearance date)?'""")
  
      @api.onchange('at_date')
      def onchange_atdate(self):
          self.until_date = self.at_date
  
      @api.onchange('until_date')
      def onchange_untildate(self):
          # ---- until_date must be always >= of at_date
          if self.until_date:
              if self.until_date < self.at_date:
                  raise UserError(
                      'Until Date must be equal or greater then At Date')
  
      @api.multi
      def print_report(self):
          pass
  
new_contents: # -*- coding: utf-8 -*-
  # Author: Andrea andrea4ever Gallina
  # Author: Francesco OpenCode Apruzzese
  # Author: Ciro CiroBoxHub Urselli
  # Copyright 2016 Camptocamp SA
  # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
  
  from openerp import models, fields, api, _
  from openerp.exceptions import Warning as UserError
  from datetime import datetime
  
  
  class OpenInvoiceWizard(models.TransientModel):
  
      _name = 'open.invoice.wizard'
  
      company_id = fields.Many2one(
          'res.company', required=True,
          default=lambda s: s.env.user.company_id)
      at_date = fields.Date(
          required=True,
          default=fields.Date.to_string(datetime.today()))
      partner_ids = fields.Many2many(
          'res.partner', string='Filter partners')
      amount_currency = fields.Boolean(
          "With Currency", help="It adds the currency column")
      group_by_currency = fields.Boolean(
          "Group Partner by currency", help="It adds the currency column")
      result_selection = fields.Selection([
          ('customer', 'Receivable Accounts'),
          ('supplier', 'Payable Accounts'),
          ('customer_supplier', 'Receivable and Payable Accounts')],
          "Partner's", required=True, default='customer')
      target_move = fields.Selection([
          ('posted', 'All Posted Entries'),
          ('all', 'All Entries')], 'Target Moves',
          required=True, default='all')
      until_date = fields.Date(
          "Clearance date", required=True,
          help="""The clearance date is essentially a tool used for debtors
          provisionning calculation.
          By default, this date is equal to the the end date (
          ie: 31/12/2011 if you select fy 2011).
          By amending the clearance date, you will be, for instance,
          able to answer the question : 'based on my last
          year end debtors open invoices, which invoices are still
          unpaid today (today is my clearance date)?'""")
  
      @api.onchange('at_date')
      def onchange_atdate(self):
          self.until_date = self.at_date
  
      @api.onchange('until_date')
      def onchange_untildate(self):
          # ---- until_date must be always >= of at_date
          if self.until_date:
              if self.until_date < self.at_date:
                  raise UserError(
                      'Until Date must be equal or greater then At Date')
  
      @api.multi
      def print_report(self):
          pass
  
subject: remove comodel name