Drupal pass argument to page

Question

I have a custom Drupal module displaying some data in a table. Each row has a link which if clicked will delete the relevant row. Specifically, when the link is clicked it will take the user to a confirmation page. This page is really just a drupal form which says 'are you sure' with two buttons: 'Yes', 'No'. I figure I will need to pass the rowID to the confirmation page.

My question: What is the typically way to pass data to a new page in Drupal 7? I guess I could just add the rowID to the URL and use the $_GET[] from the confirmation page... I don't think this is very safe and was wondering if there was a better 'Drupal' way.

Thanks!

Answer 1

You'd use something like the following

<?php
function yourmod_menu() {
  // for examlple
  $items['yourmod/foo/%/delete'] = array(
    'title' => 'Delete a foo',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('youmode_foo_delete_confirm', 2), // 2 is the position of foo_id
    'access arguments' => array('delete foo rows'),
    'type' => MENU_CALLBACK,
  );

  return $items;
}

function yourmod_foo_delete_confirm($form, &$form_state, $foo_id) {
  // load the row
  $foo = yourmod_get_foo($foo_id);

  // build your form, if you need to add anything to the confirm form
  // ....
  // Then use drupal's confirm form
  return confirm_form($form,
                  t('Are you sure you want to delete the foo %title?',
                  array('%title' => $foo->title)),
                  'path/to/redirect',
                  t('Some description.'),
                  t('Delete'),
                  t('Cancel'));

}

?>

You can look here for examples of how core modules do it (have look at node_delete_confirm)

Answer 2

The simplest solution would be to use an existing module created for this purpose:

• http://drupal.org/project/entityreference_prepopulate (for entity references)
• http://drupal.org/project/nodereference_url (for node references)
• http://drupal.org/project/prepopulate (for other form values)

You can configure which form values can be set from the URL, then rewrite the fields displayed in your table to generate the necessary links.