When i send a PATCH request to my site to /webform_rest/{webform_id}/submission/{sid}?_format=json with the body




from postman, I receive a 500 error.

The site log displays the next error:

RuntimeException: Callable "Drupal\webform_rest\Plugin\rest\resource\WebformSubmissionResource::patch" requires a value for the "$webform_data" argument. en Drupal\Component\Utility\ArgumentsResolver->handleUnresolvedArgument() (line 142 of /usr/home/example.com/web/core/lib/Drupal/Component/Utility/ArgumentsResolver.php).

Am I making a bad request? What is the $webform_data argument? My webform has a field "sincronizado", of type value.

I'm using Drupal 9. REST UI 8.x-1.18. RESTful Web Services 9.0.2 Webform 6.0.0-alpha12 Webform Rest 4.0.0-beta1

Same problem sending sid parameter with Webform rest version 8.x-2.0-beta3.

My request from postman, in curl code is

curl --location --request PATCH 'http://example.com/webform_rest/webform-id-example/submission/36?_format=json' \ --header 'Content-Type: application/json' \ --header 'Authorization: Basic (admin user and password in base 64)' \ --data-raw '{ "sincronizado":"1" }'

1 Answer 1


Ok mate if you open up webform_rest\Plugin\rest\resource\WebformSubmissionResource.php

and find the patch method you will see

public function patch($webform_id, $uuid, array $webform_data) { ...

looks like Webform Rest 4.0.0-beta1 is now using the submission uuid so


"sid" should now be Webform Submission UUID

for the body field or the $webform_data

the module is looking for

  foreach ($webform_data as $field => $value) {
      $webform_submission->setElementData($field, $value);

so your json should look like:

    "filed_name": "value"

because json_decode($json_string, true) will return an array.

if that does not work then file a bug ticket

  • Thanks. I had seen the uuid parameter in the patch function. I've tested with uuid and with { "sincronizado":1} and { "sincronizado":"1"}, but ever with same result. The problem is that the patch function is not receiving the $webform_data parameter. If i set a default value [] for $webform_data parameter in patch function on WebformSubmissionResource.php i get the response 200 with message >{ > "error": { > "message": "No data has been submitted." > } >} I've sent and issue on the module project page: drupal.org/project/webform_rest/issues/3166084
    – mcventur
    Commented Aug 21, 2020 at 7:53

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