Error: Call to undefined method Drupal\Core\Field\BaseFieldDefinition::createDuplicate()

Ranjit1032002 → closed merge request !1

It appears that this happens with content_moderation module enabled, on the moderation_state field.

For now I circumvented this issue like this:

    // Clone the field.
    $original_field = $data['field'];
    if (method_exists($original_field, 'createDuplicate')) {
      // Do stuff.
    }

I had the same issue with module "Content Moderation" enabled and this fix works for me.
Needs to contrib the patch files.

I applied this MR and it worked fine for me. I didn't dig into any side effects this may have on Content Moderation. It does report that a field could not be cloned because the createDuplicate method does not exist. I suspect it isn't really an issue though.

Same issue for us at USDOJ:

Call to undefined method Drupal\Core\Field\BaseFieldDefinition::createDuplicate() in Drupal\content_type_clone\Form\CloneContentType::cloneContentTypeField() (line 67 of modules/contrib/content_type_clone/src/Form/CloneContentType.php).

This MR fixed the issue, though there was a drupal message stating:

"The field moderation_state cannot be cloned because the createDuplicate method does not exist."

Perhaps expected, and everything worked for the most part so.. good to go?

Marking as reviewed and tested by the community. Enough folks have weighed in on this one, it's good to go and improves the module.