REST API: Attachments are not uploaded to the post's year/month folder

[swissspidy]

If you upload an image to an existing post through the old media library modal, the image will be stored in the wp-content/uploads/<year>/<month> based on the post's publish date. For example, now is May, but if I upload it to a post from January, the image will be in wp-content/uploads/2024/01.

However, when uploading an image via the REST API (for example via drag & drop in the block editor), this is not the case, even though this comment on #40343 says otherwise.

So for consistency reasons, WP_REST_Attachments_Controller should be updated to match the media modal behavior (which can be found in media_handle_upload().

Props @patricia70 for helping me discover this.

Trac ticket: https://core.trac.wordpress.org/ticket/61189

[adamsilverstein]

Good catch. PR looks good, thanks for including the tests.

nice fix!

[swissspidy]

In 58130:

REST API: Ensure attachments are uploaded to the post's year/month folder.

If organizing uploads into month- and year-based folders, uploading an attachment to an existing post should store the file in wp-content/uploads/<year>/<month> based on the post's publish date. This is in line with the behavior in classic editor / the media modal.

Props swissspidy, adamsilverstein, timothyblynjacobs, skithund, sergeybiryukov, patricia70.
Fixes #61189.

Committed in https://core.trac.wordpress.org/changeset/58130