In the DAM media content overview view, only DAM - Image media types have "Check for update" as an option under Operations links.
When documents/pdfs use Entity Reference Revisions, there's currently no link for the user to see the previous version. The link uses the external_id, which always points to the finalized version of the asset. Also, when the asset is updated, but the url is not, the previous asset may be cached in the browser.
In the DAM, all the asset types can use versioning, but the Check for Update operation in Drupal is restricted to images.
See repos/acquia_dam/acquia_dam.module
if ($asset->getDerivativeId() === 'image') {
$updateUrl = Url::fromRoute('acquia_dam.version_update', ['media' => $entity->id()]);
$operations['version_update'] = [
'title' => t('Check for update'),
'weight' => -1,
'url' => $updateUrl,
];
}Only DAM - Image types have an option for Check for update.
For linked text PDFs/documents, there's no distinction in the url for new vs previous versions and there's no thumbnail preview on the update modal.
Documentation can include an example such as:
Using content moderation for nodes and either an Entity Reference Revision field or an embedded media item that uses the Update Manually configuration in Ckeditor, on an existing, published node using version 1 (v1) of a media asset.
In the DAM media content overview, all assets will have Check for Update in the operations dropdown.
For PDFs and Documents, under Manage Display, there will be new Embed Style options and some help text:
Active
1.0
Code