ARGOMENTO: website.support.ticket Valore Many2one Fantasma!!!

class wizard_registro_iva(osv.osv_memory):

    def _get_period(self, cr, uid, context=None):
        ctx = dict(context or {}, account_period_prefer_normal=True)
        period_ids = self.pool.get('account.period').find(cr, uid, context=ctx)
        return period_ids

    _name = "wizard.registro.iva"
    _columns = {
        'period_ids': fields.many2many(
            'account.period', 'registro_iva_periods_rel', 'period_id',
            'registro_id', 'Periods',
            help='Select periods you want retrieve documents from',
            required=True),
        'type': fields.selection([
            ('customer', 'Customer Invoices'),
            ('supplier', 'Supplier Invoices'),
            ('corrispettivi', 'Corrispettivi'),
        ], 'Layout', required=True),