Create a media_library form element

+1 for this idea!

We've had a the same need for our custom compound fields that need to leverage the media library. The attached patch is a working example of a Medial Library form element.

This implementation limits the selection to only a single element, which is appropriate for our use cases, but for inclusion in Drupal core, this would need to support a parameter for allowed number of media items.

So, still needs:
- Support a parameter for allowed number of media items
- Tests

We also need this, thnx for the starting patch.

This implementation limits the selection to only a single element, which is appropriate for our use cases, but for inclusion in Drupal core, this would need to support a parameter for allowed number of media items.

I don't think this should be done as an arbitrary parameter. The media library always depends on a value object, called MediaLibraryState, which contains a lot of useful information relevant to each media library instance, including the number of allowed items and the number of remaining slots. IMHO, the form element should require one of these objects in order to work. Something like:

use \Drupal\media_library\MediaLibraryState;

// @see \Drupal\media_library\MediaLibraryState::create() for parameter info
$state = MediaLibraryState::create(...);
$element = [
  '#type' => 'media_library',
  '#state' => $state,
  '#default_value' => $selected_media_item_ids,
];

Thnx phenaproxima for reviewing. Does this mean this is on the roadmap?

This is already in the Media Library roadmap, as a "could-have" (i.e., low priority) issue. :)

We also need this. I tried out the patch, but it doesn't work for me in its current form, giving me an error when trying to insert the media item. @mark_fullmer, did you create a service to handle access checks/responses for the form fields you created?

Symfony\Component\DependencyInjection\Exception\ServiceNotFoundException: You have requested a non-existent service "field:media-media". in Drupal\Component\DependencyInjection\Container->get() (line 153 of core/lib/Drupal/Component/DependencyInjection/Container.php). Drupal\media_library\OpenerResolver->get(Object) (Line: 214)

It looks like #3085466: Media Library Form Element is a duplicate of this.

We also need this. I tried out the patch, but it doesn't work for me in its current form, giving me an error when trying to insert the media item. @mark_fullmer, did you create a service to handle access checks/responses for the form fields you created?

bgreco, yes, it looks the patch in #6 is now out of date with changes to the Media Library widget introduced subsequent to Drupal 8.7.0, starting with e080ab8 (see https://github.com/drupal/drupal/commits/8.8.x/core/modules/media_librar...).

I'm working on updating the form element now, but will first review #3085466, in case that approach is more up-to-date & robust.

FYI: @nightlife2008 turned this in a contrib module: https://www.drupal.org/project/media_library_form_element — that's an attempt to isolate the required changes in a contrib module rather than a core patch.

I prefer to have the Form field API in Drupal core + the Media Library Edit modal

For now using Media Library Form API Element and Media Library Edit
Still they have got issues with Drupal core standard.

any update on this?