Written by James McDonald

August 18, 2019

# app/Controller/ShipmentsController.php
    public function toggleShipped($id = null)
        if (!$this->Shipment->exists($id)) {
            throw new NotFoundException(__('Invalid shipment'));

        if ($this->request->is(['post', 'put'])) {
            $shipment = $this->Shipment->find(
                'first', [
                    'conditions' => [
                        'Shipment.id' => $id

            $data = [
                'shipped' => !(bool) $shipment['Shipment']['shipped'],
                'id' => $id

            if ($this->Shipment->save($data)) {
                $this->Flash->success("Successfully toggled shipped state");

            } else {
                $errorText = '';
                // get Validation errors and append them into a string
                $ve = $this->Shipment->validationErrors;
                foreach (array_keys($ve) as $ak) {
                    $errorText .= join(' ', $ve[$ak]);
                $this->Flash->error('Failed to toggle shipped state. ' . $errorText);
            $this->redirect(['action' => 'index']);


This is just how I handle and display potentially multiple CakePHP 2 Validation Errors by looping through them and concatenating them together before displaying them with the Flash element


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