atk4\data\tests\smbo\Transfer::init PHP Method

    public function init()
    {
        parent::init();
        $this->j_payment->hasOne('transfer_document_id', new self());
        // only used to create / destroy trasfer legs
        if (!$this->detached) {
            $this->addCondition('transfer_document_id', 'not', null);
        }
        $this->addField('destination_account_id', ['never_persist' => true]);
        $this->addHook('beforeSave', function ($m) {
            // only for new records and when destination_account_id is set
            if ($m['destination_account_id'] && !$m->id) {
                /**/
                // In this section we test if "clone" works ok
                $this->other_leg_creation = $m2 = clone $m;
                $m2['account_id'] = $m2['destination_account_id'];
                $m2['amount'] = -$m2['amount'];
                unset($m2['destination_account_id']);
                /*/
                
                                // If clone is not working, then this is a current work-around
                
                                $this->other_leg_creation = $m2 = new Transfer($this->persistence);
                                $m2->set($m->get());
                                $m2->unset('destination_account_id');
                                $m2['account_id'] = $m['destination_account_id'];
                                $m2['amount'] = -$m2['amount']; // neagtive amount
                
                                // **/
                $m2->reload_after_save = false;
                // avoid check
                $m['transfer_document_id'] = $m2->save()->id;
            }
        });
        $this->addHook('afterSave', function ($m) {
            if ($m->other_leg_creation) {
                $m->other_leg_creation->set('transfer_document_id', $m->id)->save();
            }
            $m->other_leg_creation = null;
        });
    }