DocumentAttribute example

if (!empty($this->_config['attributes'])) {
                // Get the updated document                 $updatedDocument = Shopware()->Models()->getRepository(Document::class)->findOneBy([
                    'type' => $typID,
                    'customerId' => $this->_order->userID,
                    'orderId' => $this->_order->id,
                ]);
                // Check its attributes                 if ($updatedDocument->getAttribute() === null) {
                    // Create a new attribute entity for the document                     $updatedDocument->setAttribute(new DocumentAttribute());
                    // Persist the document                     Shopware()->Models()->flush($updatedDocument);
                }
                // Save all given attributes                 $documentAttributes = $updatedDocument->getAttribute();
                if (!$documentAttributes instanceof DocumentAttribute) {
                    throw new RuntimeException('Document attributes are not set correctly');
                }
                $documentAttributes->fromArray($this->_config['attributes']);
                // Persist the attributes                 Shopware()->Models()->flush($documentAttributes);
            }