[wp-trac] [WordPress Trac] #47194: Posts endpoint: Enable collection parameters for querying by custom field

[WordPress Trac]

#47194: Posts endpoint: Enable collection parameters for querying by custom field
--------------------------+-----------------------------
 Reporter:  coreymckrill  |      Owner:  (none)
     Type:  enhancement   |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  REST API      |    Version:
 Severity:  normal        |   Keywords:
  Focuses:  rest-api      |
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 Before the REST API was merged into Core, meta queries were possible via a
 filter parameter:

 {{{
 posts?filter[meta_key]=foo&filter[meta_value]=bar
 }}}

 This was [ticket:38378 removed] when the API was merged. In a
 [https://wordpress.slack.com/archives/C02RQC26G/p1557261445107000 recent
 Slack discussion] @kadamwhite mentioned this was due to the potential for
 very expensive DB queries, but that improvements to meta registration in
 subsequent versions of WP may have made this more possible.

 There are abundant use cases for being able to query posts via the API
 based on postmeta values, but I haven't been able to find any other Trac
 tickets about this. So I'm asking the question: would this be feasible
 now?

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Ticket URL: <https://core.trac.wordpress.org/ticket/47194>
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