[34529] introduced lazyloading for the metadata belonging to terms matching
posts in the main `WP_Query`. The current changeset improves this technique
in the following ways:
* Term meta lazyloading is now performed on the results of all `WP_Query` queries, not just the main query.
* Fewer global variable touches and greater encapsulation.
* The logic for looping through posts to identify terms is now only performed once per `WP_Query`.
Props dlh, boonebgorges.
See #34047.
git-svn-id: https://develop.svn.wordpress.org/trunk@34704 602fd350-edb4-49c9-b593-d223f7449a82
The 'last_changed' incrementor is used to invalidate the `get_terms()` query
cache. Since `get_terms()` queries may reference 'meta_query', changing term
metadata could change the results of the queries. So we invalidate the cache
on add, delete, and update.
See #10142.
git-svn-id: https://develop.svn.wordpress.org/trunk@34538 602fd350-edb4-49c9-b593-d223f7449a82
Adds a new table to the database schema (`wp_termmeta`), and a set of
`*_term_meta()` API functions. `get_terms()` and `wp_get_object_terms()`
now also support 'meta_query' parameters, with syntax identical to other
uses of `WP_Meta_Query`.
When fetching terms via `get_terms()` or `wp_get_object_terms()`, metadata for
matched terms is preloaded into the cache by default. Disable this behavior
by setting the new `$update_term_meta_cache` paramater to `false`.
To maximize performance, within `WP_Query` loops, the termmeta cache is *not*
primed by default. Instead, we use a lazy-loading technique: metadata for all
terms belonging to posts in the loop is loaded into the cache the first time
that `get_term_meta()` is called within the loop.
Props boonebgorges, sirzooro.
See #10142.
git-svn-id: https://develop.svn.wordpress.org/trunk@34529 602fd350-edb4-49c9-b593-d223f7449a82
If your plugin or site does rely on this behaviour, the arguments that are passed to `register_taxonomy()` should be altered so that `show_ui` is `true`, and arguments such as `show_in_menu` and `show_in_nav_menus` are false.
Fixes#33938
git-svn-id: https://develop.svn.wordpress.org/trunk@34359 602fd350-edb4-49c9-b593-d223f7449a82
[13216] introduced the 'public' argument for `register_taxonomy()`. This param
was used to set defaults for 'show_ui' and a number of other params, but it
never did anything itself.
With this changeset, taxonomies registered with `public=false` will no longer
be queryable on the front end, ie via taxonomy archive queries.
Props wpsmith, ocean90, nacin, ericlewis, boonebgorges.
Fixes#21949.
git-svn-id: https://develop.svn.wordpress.org/trunk@34247 602fd350-edb4-49c9-b593-d223f7449a82
The `ORDER BY` clause was forcing filesorts on large tables, and is
unnecessary, since term order doesn't matter when updating the cache.
Props mbrandys, wonderboymusic.
Fixes#28922.
git-svn-id: https://develop.svn.wordpress.org/trunk@34217 602fd350-edb4-49c9-b593-d223f7449a82
[29128] introduced updated documentation for the `'orderby'` parameter of
`get_terms()`. The new documentation mistakenly said that 'term_id' was a valid
orderby value. The current changeset makes that fantasy...A REALITY.
Props ixkaito.
Fixes#33726.
git-svn-id: https://develop.svn.wordpress.org/trunk@33903 602fd350-edb4-49c9-b593-d223f7449a82
Creates:
`class-wp-tax-query.php`
`taxonomy-functions.php`
`taxonomy.php` contains only top-level code. Class file only contains the class. Functions file only contains functions.
See #33413.
git-svn-id: https://develop.svn.wordpress.org/trunk@33760 602fd350-edb4-49c9-b593-d223f7449a82
