[wp-trac] [WordPress Trac] #20299: Preview changes on a published post makes all post meta "live"

[WordPress Trac]

#20299: Preview changes on a published post makes all post meta "live"
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 Reporter:  jakemgold                            |       Owner:
     Type:  defect (bug)                         |      Status:  new
 Priority:  normal                               |   Milestone:  Future
Component:  Revisions                            |  Release
 Severity:  major                                |     Version:  3.3.1
 Keywords:  editorial-flow has-patch needs-      |  Resolution:
  testing                                        |
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Comment (by sanchothefat):

 I have some code that gets around this problem for previews that doesn't
 feel too horrendous. It's a problem that's been really bothering some of
 our clients who want to preview changes to custom post types  (eg. events)
 with lots of metadata.

 Here's the gist: https://gist.github.com/sanchothefat/498ed66a48a4a56d349d

 You don't get post meta for each revision rather the preview meta data is
 stored against the original post with a prefixed meta_key as others have
 suggested. It gets overridden on each update/preview and you won't end up
 with orphaned post meta. Works fairly well so far but those sound like
 famous last words...

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Ticket URL: <http://core.trac.wordpress.org/ticket/20299#comment:39>
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