[wp-trac] [WordPress Trac] #37923: Introduce shared wp_blogmeta database table for multisite installation

[WordPress Trac]

#37923: Introduce shared wp_blogmeta database table for multisite installation
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 Reporter:  johnjamesjacoby                      |       Owner:  flixos90
     Type:  feature request                      |      Status:  reviewing
 Priority:  normal                               |   Milestone:  5.0
Component:  Networks and Sites                   |     Version:
 Severity:  normal                               |  Resolution:
 Keywords:  has-patch has-unit-tests needs-      |     Focuses:  multisite
  testing ms-roadmap                             |
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Comment (by spacedmonkey):

 In [https://core.trac.wordpress.org/attachment/ticket/37923/37923.16.diff
 37923.16.diff] these are the key changes.

 - Removed checks to see if site meta exists. When a new test suite is run,
 then site meta will be installed and always will be there.
 - Added `test_is_site_meta_supported_filtered` test.
 - Added a doing it wrong message is you call *_site_meta and the table
 isn't installed.
 - Added `$update_meta_cache` param to `update_site_cache`

 @jeremyfelt I have reviewed the tested and compared them to existing unit
 tests for other object types. I think these tests hold up pretty well. We
 are not testing meta queries as not supporting this right now. Otherwise
 most of these are very simple wrappers for the meta functions. Any testing
 on caching for meta, should be done upsteam in the meta functions tests.

 As for `@todo use clean_blog_cache here` this is related to when site meta
 query (#40229) + granular caching for site query (#42252) go into core.

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Ticket URL: <https://core.trac.wordpress.org/ticket/37923#comment:78>
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