[wp-trac] [WordPress Trac] #38323: Reconsider $object_subtype handling in `register_meta()`

[WordPress Trac]

#38323: Reconsider $object_subtype handling in `register_meta()`
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 Reporter:  flixos90                             |       Owner:  kadamwhite
     Type:  enhancement                          |      Status:  reviewing
 Priority:  normal                               |   Milestone:  5.0
Component:  Options, Meta APIs                   |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch needs-dev-note has-unit-   |     Focuses:  rest-api
  tests                                          |
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Comment (by kadamwhite):

 After @spacedmonkey raised performance concerns at WCEU contributor day
 about the way we retrieve and throw away an entire post object in
 get_object_subtype, `38323.12.diff` streamlines the way we are looking up
 post type information to avoid this.

 `38323.12.diff` also reinstates support for returning `comment_type`, when
 available, after further conversation with @flixos90 @rmccue and others.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38323#comment:74>
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