[wp-trac] [WordPress Trac] #20564: Framework for storing revisions of Post Meta

[WordPress Trac]

#20564: Framework for storing revisions of Post Meta
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 Reporter:  alexkingorg  |       Owner:
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  3.6
Component:  Revisions    |     Version:
 Severity:  normal       |  Resolution:
 Keywords:               |
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Comment (by WraithKenny):

 I think we just need a few new wrapper functions (like
 `add_versioned_meta()`, `update_versioned_meta()`, and
 `delete_versioned_meta()` ) that don't check against
 `wp_is_post_revision()`. Using these would "opt in" to metadata on
 revisions. (of course you could currently just use `*_metadata('post'...)`
 functions, no?)

 then on 'wp_restore_post_revision' (with 2 args)
 {{{
 $meta = get_post_meta( $revision_id, $key );
 if ( empty( $meta ) )
     delete_post_meta( $post_id, $key );
 else
     update_post_meta( $post_id, $key, $meta );
 // or whatnot.
 }}}
 which is pretty straight forward (and also "opt in").
 Optionally, core can hook onto 'wp_restore_post_revision' and loop thru a
 filterable array of "versioned" meta so that the following could work:
 {{{
 add_filter( 'versioned_meta', 'my_versioned_meta' );
 function my_versioned_meta( $meta_keys ) {
     $meta_keys[] = 'my_key';
     return $meta_keys;
 }
 }}}

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Ticket URL: <http://core.trac.wordpress.org/ticket/20564#comment:32>
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