Adding a Footer Row to the CSV

Oct 13, 2025 by talynt.org 116 views

Introduction

When working with CSV exports in Drupal 10, especially when using Views, it's often necessary to add additional information to the exported file. One common requirement is to include a footer row at the end of the CSV, which can display various statistics or totals. In this article, we'll explore how to add a footer row programmatically using the hook_views_data_export_row_alter() hook in Drupal 10.

Understanding the `hook_views_data_export_row_alter()` Hook

The hook_views_data_export_row_alter() hook is a powerful tool in Drupal 10 that allows developers to modify the data exported by Views. This hook is called after the data has been retrieved from the database but before it's exported to the file. By using this hook, you can add, remove, or modify data as needed.

Adding a Footer Row to the CSV

To add a footer row to the CSV, you'll need to use the hook_views_data_export_row_alter() hook and modify the data array that's being exported. Here's an example of how you can do this:

Example Code

use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\display\DisplayPluginInterface;
use Drupal\views\Plugin\views\display\DisplayPluginBase;
use Drupal\views\Plugin\views\display\DisplayPluginCollection;
/**

Implements hook_views_data_export_row_alter().
*/
function YOUR_MODULE_views_data_export_row_alter(array &$data, ViewExecutable $view, DisplayPluginInterface  $display, array &amp;$ options) {
// Get the total number of records.
$total_records = $view->result->total_count;

// Add a footer row to the data array.
$footer_row = [
'footer_row' => [
'total_records' => $total_records,
],
];
// Append the footer row to the data array.
$data[] = $footer_row;
}

In this example, we're using the hook_views_data_export_row_alter() hook to add a footer row to the data array. We're getting the total number of records using the $view->result->total_count property and then adding a new row to the data array with the key 'footer_row'. The value of this row is an array with a single key-value pair, where the key is 'total_records' and the value is the total number of records.

Displaying the Footer Row in the CSV

To display the footer row in the CSV, you'll need to modify the CSV export settings in your Views display. Here's how you can do this:

Step 1: Go to the Views Display Settings

Go to the Views display settings page by clicking on the "Views" link in the Drupal admin menu.
Click on the "Display settings" tab.
Scroll down to the "CSV export" section.

Step 2: Modify the CSV Export Settings

In the "CSV export" section, click on the "Edit" button next to the "CSV export" field.
In the "CSV export" field, select the "Footer row" option.
In the "Footer row" field, select the "footer_row" option.
Click "Save" to save the changes.

Conclusion

Adding a footer row to a CSV programmatically in Drupal 10 is a straightforward process that can be achieved using the hook_views_data_export_row_alter() hook. By following the steps outlined in this article, you can add a footer row to your CSV exports and display various statistics or totals. Remember to modify the CSV export settings in your Views display to display the footer row in the CSV.

Additional Tips and Variations

To add multiple footer rows, you can modify the $footer_row array to include multiple key-value pairs.
To display different statistics or totals, you can modify the $total_records variable to include different data.
To customize the appearance of the footer row, you can modify the CSV export settings in your Views display.

Common Issues and Solutions

Issue: The footer row is not displaying in the CSV.
Solution: Check that the hook_views_data_export_row_alter() hook is being called correctly and that the footer row is being added to the data array.
Issue: The footer row is displaying in the wrong location.
Solution: Check that the CSV export settings in your Views display are set correctly to display the footer row in the correct location.

Best Practices

Always use the hook_views_data_export_row_alter() hook to modify the data array that's being exported.
Always check that the footer row is being added to the data array correctly.
Always modify the CSV export settings in your Views display to display the footer row in the correct location.
Q&A: Adding a Footer Row to a CSV Programmatically in Drupal 10 ================================================================

Introduction

In our previous article, we explored how to add a footer row to a CSV programmatically in Drupal 10 using the hook_views_data_export_row_alter() hook. In this article, we'll answer some frequently asked questions about adding a footer row to a CSV programmatically in Drupal 10.

Q: What is the `hook_views_data_export_row_alter()` hook?

A: The hook_views_data_export_row_alter() hook is a powerful tool in Drupal 10 that allows developers to modify the data exported by Views. This hook is called after the data has been retrieved from the database but before it's exported to the file.

Q: How do I use the `hook_views_data_export_row_alter()` hook to add a footer row to a CSV?

A: To use the hook_views_data_export_row_alter() hook to add a footer row to a CSV, you'll need to modify the data array that's being exported. Here's an example of how you can do this:

use Drupal\Core\Entity\EntityManagerInterface;
use Drupal\views\ViewExecutable;
use Drupal\views\Plugin\views\display\DisplayPluginInterface;
use Drupal\views\Plugin\views\display\DisplayPluginBase;
use Drupal\views\Plugin\views\display\DisplayPluginCollection;
/**

Implements hook_views_data_export_row_alter().
*/
function YOUR_MODULE_views_data_export_row_alter(array &$data, ViewExecutable $view, DisplayPluginInterface  $display, array &amp;$ options) {
// Get the total number of records.
$total_records = $view->result->total_count;

// Add a footer row to the data array.
$footer_row = [
'footer_row' => [
'total_records' => $total_records,
],
];
// Append the footer row to the data array.
$data[] = $footer_row;
}

Q: How do I display the footer row in the CSV?

A: To display the footer row in the CSV, you'll need to modify the CSV export settings in your Views display. Here's how you can do this:

Step 1: Go to the Views Display Settings

Go to the Views display settings page by clicking on the "Views" link in the Drupal admin menu.
Click on the "Display settings" tab.
Scroll down to the "CSV export" section.

Step 2: Modify the CSV Export Settings

In the "CSV export" section, click on the "Edit" button next to the "CSV export" field.
In the "CSV export" field, select the "Footer row" option.
In the "Footer row" field, select the "footer_row" option.
Click "Save" to save the changes.

Q: Can I add multiple footer rows to a CSV?

A: Yes, you can add multiple footer rows to a CSV. To do this, you'll need to modify the $footer_row array to include multiple key-value pairs.

$footer_row = [
  'footer_row_1' => [
    'total_records' => $total_records,
  ],
  'footer_row_2' => [
    'average_rating' => $average_rating,
  ],
];

Q: Can I customize the appearance of the footer row?

A: Yes, you can customize the appearance of the footer row. To do this, you'll need to modify the CSV export settings in your Views display.

Step 1: Go to the Views Display Settings

Go to the Views display settings page by clicking on the "Views" link in the Drupal admin menu.
Click on the "Display settings" tab.
Scroll down to the "CSV export" section.

Step 2: Modify the CSV Export Settings

In the "CSV export" section, click on the "Edit" button next to the "CSV export" field.
In the "CSV export" field, select the "Footer row" option.
In the "Footer row" field, select the "footer_row" option.
Click "Save" to save the changes.

Q: What are some common issues that can occur when adding a footer row to a CSV?

A: Some common issues that can occur when adding a footer row to a CSV include:

The footer row is not displaying in the CSV.
The footer row is displaying in the wrong location.
The footer row is not being added to the data array correctly.

Q: How can I troubleshoot these issues?

A: To troubleshoot these issues, you can try the following:

Check that the hook_views_data_export_row_alter() hook is being called correctly.
Check that the footer row is being added to the data array correctly.
Check that the CSV export settings in your Views display are set correctly.

Conclusion

Adding a footer row to a CSV programmatically in Drupal 10 is a powerful tool that can be used to display various statistics or totals. By following the steps outlined in this article, you can add a footer row to your CSV exports and customize the appearance of the footer row. Remember to troubleshoot any issues that may occur and to modify the CSV export settings in your Views display to display the footer row in the correct location.