[wp-trac] [WordPress Trac] #24696: Support for custom $meta_types with update_metadata()

[WordPress Trac]

#24696: Support for custom $meta_types with update_metadata()
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 Reporter:  GaryJ        |      Owner:
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  Awaiting Review
Component:  General      |    Version:
 Severity:  normal       |   Keywords:
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 `update_post_meta()` is a simple wrapper for `update_metadata()` with a
 first param of `post` as the `$meta_type`. `update_metadata()` has some
 dynamically named filters which use this `$meta_type`, so if you've
 registered a CPT of dog, then it would nicer to allow a function to run
 against `update_dog_metafilter`, than the more heavily hit
 `update_post_metafilter`. This would be done by calling
 `update_metadata('dog' ...)` instead of `update_post_meta()`, and would
 save the function interfering in *all* postmeta table saves.

 The constraint here, is that the `_get_meta_table()` returns false if a
 `*meta` table doesn't exist. If it could fallback to using `postmeta`
 table instead, then you could separate the name of the filters away from
 the table it's being saved to (logic layer tied in to the storage layer),
 and have it associate with the object type instead.

 There may well be other consequences I've not discovered yet, and the
 suggestion would apply to `delete_metadata()` and other friends as well.
 The end result would be that:

  * **Object Type** - **Filter Name** - **Table**
  * post - update_post_metdata - postmeta
  * user - update_user_metdata - usermeta
  * comment - update_comment_metdata - commentmeta
  * dog - **update_dog_metdata** - postmeta
 * listing - **update_listing_metdata** - postmeta

 Rather than:

  * **Object Type** - **Filter Name** - **Table**
  * ...
  * dog - update_post_metdata - postmeta
  * listing - update_post_metdata - postmeta

 which is what's currently required.

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Ticket URL: <http://core.trac.wordpress.org/ticket/24696>
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