[wp-trac] [WordPress Trac] #42094: REST API: extend _fields parameter to selectively include nested fields in response JSON

[WordPress Trac]

#42094: REST API: extend _fields parameter to selectively include nested fields in
response JSON
-------------------------+-----------------------------
 Reporter:  kadamwhite   |       Owner:  (none)
     Type:  enhancement  |      Status:  new
 Priority:  normal       |   Milestone:  Future Release
Component:  REST API     |     Version:  4.9
 Severity:  normal       |  Resolution:
 Keywords:               |     Focuses:
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Comment (by kadamwhite):

 Updates from REST API chat discussion: This has renewed relevance given
 [https://github.com/WordPress/gutenberg/issues/11782#issuecomment-456133867
 discussions within the Gutenberg repo] around how to signal that we can
 skip the expensive generation of `content.rendered` when the filtered
 value is not used. Implementing that in Gutenberg is non-trivial, but this
 `_fields` improvement is a good first step and would yield immediate
 performance gains for client-side consumers even without any special
 handling within our controllers.

 In Slack @danielbachhuber proposes `?_fields=content[raw]` as an
 alternative to either of the syntaxes discussed above.

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Ticket URL: <https://core.trac.wordpress.org/ticket/42094#comment:3>
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