[wp-trac] [WordPress Trac] #40229: Add meta_query to wp_site_query

[WordPress Trac]

#40229: Add meta_query to wp_site_query
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 Reporter:  spacedmonkey                         |       Owner:  flixos90
     Type:  enhancement                          |      Status:  assigned
 Priority:  normal                               |   Milestone:  5.0
Component:  Networks and Sites                   |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  ms-roadmap has-patch has-unit-tests  |     Focuses:  multisite
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Changes (by flixos90):

 * keywords:  needs-patch needs-unit-tests ms-roadmap => ms-roadmap has-
     patch has-unit-tests
 * owner:  spacedmonkey => flixos90


Comment:

 [attachment:40229.diff] implements meta query functionality in
 `WP_Site_Query`:

 * The implementation itself is trivial and straightforward. It follows
 mostly how other query classes do it. The orderby-meta functionality
 deserves an extra look because it's the most complicated part, but the
 provided tests confirm it works as expected.
 * `class-wp-meta-query.php` is loaded earlier in `wp-settings.php` to
 allow this functionality early during the multisite bootstrap process.
 This will fix #40948.
 * Comprehensive tests have been added for the meta query functionality,
 i.e. one parameterized test with 10 datasets, each testing different
 behavior.
 * Three additional tests have been added to verify that
 adding/updating/deleting site meta busts the site query cache.

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Ticket URL: <https://core.trac.wordpress.org/ticket/40229#comment:10>
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