Prior to 4.7, term relationships - as set by `wp_set_object_terms()` or
`wp_remove_object_terms()` - did not affect the term query cache. The
introduction of the 'object_ids' parameter in 4.7 means that the query
cache must be aware of object-term relationships. As such, the
'last_changed' incrementor is now invalidated when term relationships
are modified.
This bug only reared its head when delaying term counting, because term
counting performs its own term query cache invalidation.
Props mboynes.
Fixes#40306.
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A couple of REST API tests had an assertion `assertNotInstanceOf( 'WP_Error', $response );` which will never be true.
Since these assertions are invalid, and also made redundant by the response status check, we can just remove them.
Props dlh.
Fixes#40270.
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In previous iterations of `WP_Site`, there was concern that not all properties would be available when storing a site's details in cache. When introduced in [37918], an `ms_loaded` check was added to address this concern. Any properties that are still `false` after `ms_loaded` really are `false` and can be cached as such.
Props flixos90.
Fixes#40247.
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In [31349], core `varchar` column key lengths were changed from 255 to 191 to support the 767 byte index size limit on standard utf8mb4 MySQL installs. This changes the DB schema tests to match.
Props caseypatrickdriscoll, clarinetlord.
Fixes#35958.
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This extends the existing behavior which only showed a message only when there were no widget areas rendered in the preview. The number of non-rendered widget areas is indicated. Also removes needles deletion of `wp.customize.Widgets.data.l10n` property which hindered plugins.
See #33567, #33052.
Fixes#39087.
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Avoid a PHP Error when attempting to embed the parent post of an attachment, when the parent post ID is invalid. Instead check if the parent post object exists before checking the read permission for the parent post.
Props GhostToast.
Fixes#39881.
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Previously `update_blog_option()` would trigger an invalidation of that site's entire cache although these changes did not affect the content of these caches. Furthermore changes to the special options `blogname`, `siteurl` and `post_count` should not invalidate the entire cache of that site, but only their respective site details cache. The option `home` now has the same behavior as it also belongs to the site details, but did not invalidate the cache at all previously.
Several new unit tests confirm these changes work as expected.
Fixes#40063.
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Exclude 'node_modules' directories from paths searched in `WP_Theme::scandir()`. Introduces the `theme_scandir_exclusions` filter to allow sites to exclude any other paths like `bower_components` or `vendor` from being searched for template files.
Props lukasbesch, dd32, swisspidy, rachelbaker.
Fixes#38292.
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This prevents an additional 301 redirect when clicking on the nav menu item, and it also prevents a scenario where the auth cookie may not be passed and cause an authentication error when navigating in the customizer.
Props dlh, swissspidy.
Fixes#40112.
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It is sometimes desirable to support shorter site names than 4 characters, therefore that restriction should be removed. It is still possible to manually enforce it by using the `wpmu_validate_blog_signup` filter.
As a result of this change, another `is_super_admin()` call gets removed which affects the ongoing efforts of working on a network-wide role system.
Props milindmore22.
Fixes#39676. See #37616.
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Prior to [38677], `get_term_by()` would always return false if
an empty string were passed as the queried 'name' or 'slug'. The
refactor to use `get_terms()` broke this behavior; inappropriately
imprecise `empty()` checks caused the 'name' or 'slug' clause to be
discarded altogether when fetching terms, resulting in an incorrect
term being returned from the function.
We fix the regression by special-casing truly empty values passed
to `get_term_by()`, and ensuring that `WP_Term_Query` is properly
able to handle `0` and `'0'` term queries.
Props sstoqnov.
Fixes#21760.
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