I have a wizard and In need a temporary list of other transientmodel. My code is the following: 

class proves_wizard_raws(models.TransientModel):
        _name = 'game.proves_wizard_raws'
        wizard = fields.Many2one('game.proves_wizard')
        raw = fields.Many2one('game.raw')
        quantity = fields.Integer()


class proves_wizard(models.TransientModel):
    _name = 'game.proves_wizard'

    def _default_player(self):
        return self.env['res.partner'].browse(self._context.get('active_id'))

    player = fields.Many2one('res.partner', default=_default_player)
    raw = fields.Many2one('game.raw', store=False)
    quantity = fields.Integer(store=False)
    raws = fields.Many2many('games.proves_wizard_raws', compute='_get_raws')

    def _get_raws(self):
        for p in self:
            list= self.env['game.proves_wizard_raws'].search(['wizard','=',p.id])
            p.raws = list


    def create_raws(self):
        raw = self.env['game.proves_wizard_raws'].create({'wizard': self.id, 'raw': self.raw.id, 'quantity': self.quantity})
        return {
            'name': 'proves wizards',
            'view_type': 'form',
            'view_mode': 'form',  
            'res_model': 'game.proves_wizard',  
            'res_id': self.id,             
            'context': self._context,  
            'type': 'ir.actions.act_window',
            'target': 'new',  
        }

But the Many2many doesn't works. I tried it with a One2many, but I have similar error.

Is there a way to have a temporary many2many?

EDIT: 

I just solve the problem. It is the name of the transientmodel, It fails with two underscore lines _ I changed it to proves_wizardraws and it works. I finalty used One2many instead of the Many2many computed. 

Thanks.