Filter for unattached attachments count

[khromov]

There is a filter available for modifying attachment counts (wp_count_attachments) but no filter for modifying unattached attachments count. Therefore I am suggesting this be added via a new filter, wp_count_unattached_attachments, see attached patch.

The attached patch is against trunk.

[ericlewis]

Hey @khromov, thanks for the bug report and patch!

Can you provide a use case for this?

[khromov]

Hey Eric,

I'm making a plugin that will allow non-admins to see their own Media items only.

Here is a working copy of the plugin, (assuming the hook is added as per my patch):

​https://gist.github.com/khromov/29411bb7ca3fdd2c3890

The "problem" is the inconsistency that you can filter media attachment counts, but not the unattached media attachment count.

Here's a photo for clarification. The count in the red box cannot be filtered.
​https://dl.dropboxusercontent.com/u/2758854/this-one-.png

[wonderboymusic]

I would suggest that the filter occur before the database query and pass null. That way, if you get a non-null value, you can return immediately without hitting the database.