[34999] modified the cache strategy for terms in the context of
`wp_get_object_terms()`. As part of these changes, the `object_id` property of
term objects had to be unset before being cached. To avoid modifying passed-by-
reference terms, `update_term_cache()` attempted to make a copy of the terms
passed to the function; however, it failed to use the `clone` keyword, and thus
only created a reference instead of a copy.
Merges [36323] to the 4.4 branch.
Props berengerzyla.
Fixes#35462.
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[35333] implemented `public=false` for taxonomies. The implementation prevented
non-public taxonomies from having their archives accessed via query_var during
a normal request. But it didn't prevent non-public taxonomies from registering
their query vars in the `$wp_taxonomies` global. The latter implementation
details causes problems specifically when a taxonomy is registered with
`query_var=true`; for public taxonomies, `register_taxonomy()` translates this
into a query_var equivalent to the taxonomy name, but in the case of non-public
taxonomies, the query_var was set to the boolean itself. The boolean then
causes problems when using non-strict comparison to filter taxonomy objects by
query_var, as when using `get_taxonomies()`.
This changeset addresses the issue by forcing the query_var property of
non-public taxonomies to `false`.
Merges [36108] to the 4.4 branch.
Fixes#35089.
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[34217] removed the `ORDER BY` clause from `update_object_term_cache()`, for
improved performance. But this proved to cause problems in cases where users
were expecting the results of `get_the_terms()` to be ordered by 'name'. Let's
revert the change for the time being, and look into more disciplined ordering
in a future release.
Merges [36056] to the 4.4 branch.
Props afercia.
See #28922. Fixes#35180.
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The introduction of 'meta_query' to `get_terms()` in 4.4 made it possible for
`get_terms()` to erroneously return duplicate results. To address the issue,
we add the `DISTINCT` keyword to the SQL query when a 'meta_query' parameter
has been provided.
Merges [36003] to the 4.4 branch.
Props @jadpm.
Fixes#35137.
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`get_term()` now returns a `WP_Term` object, instead of a `stdClass` object.
Cache support and sanitization filters for individual terms are now more
centralized. For example, `get_term_by()` is able to cast results of its query
to a `WP_Term` object by passing it through `get_term()`.
The `$taxonomy` parameter for `get_term()` is now optional, as terms ought to
be unique to a taxonomy (ie, shared terms no longer exist). In cases where
`get_term()` detects that the term matching the specified term_id is from the
wrong taxonomy, it checks to see if you've requested a shared term, and if so,
it splits the term. This is used only for fallback purposes.
The elimination of shared terms allows the caching strategy for terms to be
simplified. Individual terms are now cached in a single 'terms' bucket.
Props flixos90, boonebgorges, scribu, dipesh.kakadiya.
See #14162.
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`wp_suspend_cache_invalidation()` was originally added to increase performance,
but the switch to batch processing in [33615] mitigates serious performance
concerns.
As a precaution against timeouts, the batch size has been reduced from 20 to 10.
Props Chouby.
See #30261.
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[32814] introduced a routine to split shared terms, which was run during the
regular WP database upgrade. This turned out to be problematic because plugins
are not loaded during the db upgrade (due to `WP_INSTALLING`), with the result
that plugins were not able to hook into the 'split_shared_term' action during
the bulk split. We work around this limitation by moving the term splitting
routine to a separate process, triggered by a wp-cron hook.
Props boonebgorges, Chouby, peterwilsoncc, pento, dd32.
Fixes#30261.
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This changeset adds two new filters:
* 'wp_unique_term_slug_is_bad_slug' lets developers control whether a test slug needs to be made unique, before the queries required to build a suffix are performed.
* 'wp_unique_term_slug' filters the output of the function.
These changes introduce parity with the filters in `wp_unique_post_slug()`.
Props coffee2code, bolo1988, boonebgorges.
Fixes#20783.
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* Introduce a `$record` parameter, which defaults to true. When set to false, `_split_shared_term()` will not keep a record of split term data in wp_options. The judicious use of this flag can greatly improve performance when processing shared terms in batches.
* Allow term/tt objects to be passed to the `$term_id` and `$term_taxonomy_id` parameters. This has the potential to save database queries when the objects are already available.
See #30261.
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Correct some `@return` values.
Some functions can `return new WP_Error` without setting it to a variable.
Some functions can return their `apply_filters(...)` call without first setting it to a variable.
`is_object_in_taxonomy()` can return its conditional instead of if/else true/false.
See #32444.
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This new argument allows developers to specify which term field should be
matched by the value of the `$term` parameter (in particular, 'name' and
'term_taxonomy_id' are now supported).
Props sudar, mordauk.
Fixes#14156.
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Using an array keyed by term_id allows us to use `isset()` rather than the
slower `in_array()`. In addition, it lets us avoid the use of `wp_list_pluck()`
on large arrays, and helps us to avoid arrays that are unnecessarily large due
to duplicate entries.
Fixes#32144 for trunk.
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`wp_insert_term()` protects against the creation of terms with duplicate names
at the same level of a taxonomy hierarchy. However, it's historically been
possible to override this protection by explicitly providing a value of `$slug`
that is unique at the hierarchy tier. This ability was broken in [31734], and
the current changeset restores the original behavior.
A number of unit tests are added and refactored in support of these changes.
See #17689 for discussion of a fix that was superceded by [31734]. This commit
retains the fix for the underlying bug described in that ticket.
See #31328.
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Previously, it was noted that -1 would return all possible results. However, as the value of `$number` is passed through `absint()`, -1 would actually be converted to 1, thereby producing unexpected results.
Props iandunn.
Fixes#31526.
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The existing 'wp_get_object_terms' filter accepts a parameter `$taxonomies`,
which is a list of taxonomy names formatted for direct use in a MySQL IN clause.
This formatting makes it difficult to make use of the taxonomy list in filter
callbacks. However, changing the parameters passed to the existing filter
raises backward compatibility concerns, so we introduce a new filter that
receives a structured `$taxonomy_array` parameter.
We also take this opportunity to correct and clean up some of the documentation
on the 'wp_get_object_terms' filter.
Props postpostmodern, doublesharp, wonderboymusic, nacin.
Fixes#18828.
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