I am trying to alter the data in a webform submission before this is being saved in to the database.

In D7 i would do something like this:

function mymodule_webform_submission_presave($node, &$submission){
  if($submission->nid == 1234){ 
    $n = node_load(4321);
    $value = $n->field_value['und'][0]['value'];
    $submission->data[2][0] = $value;

However I am not able to achieve the same in Drupal 9. I have tried using some of the hook_webform_handler_invoke_alter and hook_webform_handler_invoke_METHOD_NAME_alter hooks listed in webform.api.php without success. Are these the correct hooks to use, I have not been able to identify any "submission_presave" hooks in the Drupal 9 version of webform module (currently v 6.2.2). Any help or guidance toward the best solution would be appreciated.

  • webform_submission is an entity type, so you'd use hook_ENTITY_TYPE_presave - which gives you the same function name as your Drupal 7 version. You'll need to change the function signature (first arg will be $entity, the submission), and the method body to manipulate the new entity structure, but that's where you'd do it
    – Clive
    Jan 31 at 10:56
  • Clive, thank you for your answer, I appreciate it :) -- I have tried that hook as well, but I must be doing something wrong. I have tried a function called mymodule_webform_submission_presave(Drupal\webform\Entity\WebformSubmission $webform_submission){} and a lot of variations of that - but i can't seem to get them to work, or access/dump the submission data.
    – hasse88
    Jan 31 at 11:35

1 Answer 1


You can use hook_ENTITY_TYPE_presave() to alter webform submission data before insert:

function Mymodulename_webform_submission_presave(\Drupal\webform\Entity\WebformSubmission $webform_submission){
  // Get webform type/variation
  $webform_type = $webform_submission->getWebform()->id();
  if($webform_type == 'contact'){
    // Get user submitted data 
    $data = $webform_submission->getData();
    // Alter the data of title field
    $data['title'] = 'Testing tt';
    // Pass altered data 

Note: can pass parameter that specific to hook Drupal\webform\Entity\WebformSubmission $webform_submission or in this way \Drupal\Core\Entity\EntityInterface $entity both are correct

You can follow this refrence to read more about hook_ENTITY_TYPE_presave() hook.

  • I disagree, I think it's better to use the actual type that's expected, rather than the generic one, for $entity. It's simply more accurate. It definitely isn't "incorrect" to do it that way, as your answers implies
    – Clive
    Jan 31 at 17:50
  • Thanks for flagging it out , however I did not delete the ans as it's generic code to update webform submission programatically Jan 31 at 18:38
  • Thanks very much, that seems to work. And in addition - if I want to dump the data, but not have to resubmit the form every time, would that be possible. If i dpm($webform_type), it dumps the webform id on the confirmation page, but if I then afterwards want to check what the $data array returns, I have to go back and fill out the form again and dpm($data). Would be nice if I could just refresh the page to give me the next dpm(), and throwing in an exit(); after the dpm($webform_type); just gives me a completely white screen. I tried var_dump(), print_r(), dump() as well with the same result.
    – hasse88
    Feb 1 at 6:53
  • You can use drupal logger function like this \Drupal::logger('module_name')->notice('<pre><code>' . print_r($webform_submission->getData()), TRUE) . '</code></pre>' ); or use this function dd($webform_submission->getData()) to print webform submission data Feb 1 at 9:10
  • Okay, thank you, I will have look at those options. I have upvoted your answer :)
    – hasse88
    Feb 1 at 9:39

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