BondsController.php

            $followUp = $this->Bonds->FollowUps->find()->where(['bond_id' => $bondId])->first();
            if ($elemId == 'enableFollowUp') {
                if ($followUp) {
                    $followUp->enabled = !$followUp->enabled;
                } else {
                    $followupData = [
                        'last_run' => date('Y-m-d H:i:s'),
                        'email_daily_sent_count' => 0,
                        'email_monthly_sent_count' => 0,
                        'enabled' => 1,
                        'bond_id' => $bondId,
                    ];
                    $followUp = $this->FollowUps->newEntity($followupData);
                }
            } else {
                if (!$followUp || $followUp->enabled == 0) {
                    $error = true;
                } else {
                    $followUp->last_run = date('Y-m-d H:i:s');
                    $followUp->email_daily_sent_count = 0;
                    $followUp->email_monthly_sent_count = 0;
                    $followUp->enabled = 1;
                }
            }

            if ($error || !$this->FollowUps->save($followUp)) {
                $jsonResponse['success'] = 'false';
            } else {
                $jsonResponse['followUp'] = $followUp;
            }