[wp-trac] [WordPress Trac] #38701: Remove rest_get_post filter

[WordPress Trac]

#38701: Remove rest_get_post filter
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 Reporter:  rmccue        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  4.7
Component:  REST API      |    Version:  trunk
 Severity:  normal        |   Keywords:  has-patch
  Focuses:                |
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 This filter was originally introduced in [https://github.com/WP-API/WP-
 API/pull/2535 GH#2535] to support Customizer Changesets (née
 Transactions). This is a super broad filter and doesn't really fit with
 the design of the API, nor is it (arguably) the right level to do this.

 #12955 covers the addition of a new `get_post` filter, which would enable
 this at the lower level more nicely. I
 [https://wordpress.slack.com/archives/core-restapi/p1478568033001007 spoke
 to @westonruter in #core-restapi], and we agreed that the lower level
 filter is a better place for it.

 The existing filters almost entirely cover the use-case, with `the_post`
 called in `setup_postdata`, which is called in the preparation method. The
 exception is the post status and post parent checks in the permission
 checks.

 We can instead update these to use the wrapper functions in core:
 `get_post_status` and `wp_get_post_parent_id()`. The former is filterable,
 the latter currently isn't, but can be changed.

 This needs to be in 4.7, as the filter is new in trunk.

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Ticket URL: <https://core.trac.wordpress.org/ticket/38701>
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