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Allow `get_terms()` results to ordered by metadata. 

The `$orderby` parameter of `get_terms()` now accepts the following values,
related to term meta:

* 'meta_value'
* 'meta_value_num'
* the value of the `$meta_key` parameter
* any key from the `$meta_query` array

This brings order-by-meta support for terms in line with post, comment, and
user queries.

As a byproduct of these improvements, `$meta_key` and `$meta_value` parameters
have been introduced to `get_terms()`. They interact with `$meta_query` in the
same way as in `WP_Query` and other query classes.

Props jadpm, eherman24.
Fixes #34996.
Built from https://develop.svn.wordpress.org/trunk@36485


git-svn-id: http://core.svn.wordpress.org/trunk@36452 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
Boone Gorges 2016-02-06 04:42:26 +00:00
parent f1c0ed714a
commit fe1dd15126
2 changed files with 52 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

55
wp-includes/taxonomy.php
View File

@ -1060,6 +1060,7 @@ function get_term_to_edit( $id, $taxonomy ) {
* @since 4.4.0 Introduced the ability to pass 'term_id' as an alias of 'id' for the `orderby` parameter.
* Introduced the 'meta_query' and 'update_term_meta_cache' parameters. Converted to return
* a list of WP_Term objects.
* @since 4.5.0 Introduced 'meta_key' and 'meta_value' parameters. Introduced the ability to order results by metadata.
*
* @global wpdb $wpdb WordPress database abstraction object.
* @global array $wp_filter
@ -1071,7 +1072,9 @@ function get_term_to_edit( $id, $taxonomy ) {
* @type string $orderby Field(s) to order terms by. Accepts term fields ('name', 'slug',
* 'term_group', 'term_id', 'id', 'description'), 'count' for term
* taxonomy count, 'include' to match the 'order' of the $include param,
* or 'none' to skip ORDER BY. Defaults to 'name'.
* 'meta_value', 'meta_value_num', the value of `$meta_key`, the array
* keys of `$meta_query`, or 'none' to omit the ORDER BY clause.
* Defaults to 'name'.
* @type string $order Whether to order terms in ascending or descending order.
* Accepts 'ASC' (ascending) or 'DESC' (descending).
* Default 'ASC'.
@ -1119,6 +1122,10 @@ function get_term_to_edit( $id, $taxonomy ) {
* @type bool $update_term_meta_cache Whether to prime meta caches for matched terms. Default true.
* @type array $meta_query Meta query clauses to limit retrieved terms by.
* See `WP_Meta_Query`. Default empty.
* @type string $meta_key Limit terms to those matching a specific metadata key. Can be used in
* conjunction with `$meta_value`.
* @type string $meta_value Limit terms to those matching a specific metadata value. Usually used
* in conjunction with `$meta_key`.
* }
* @return array|int|WP_Error List of WP_Term instances and their children. Will return WP_Error, if any of $taxonomies
* do not exist.
@ -1414,13 +1421,53 @@ function get_terms( $taxonomies, $args = '' ) {
// Meta query support.
$join = '';
$distinct = '';
if ( ! empty( $args['meta_query'] ) ) {
$mquery = new WP_Meta_Query( $args['meta_query'] );
$mq_sql = $mquery->get_sql( 'term', 't', 'term_id' );
$mquery = new WP_Meta_Query();
$mquery->parse_query_vars( $args );
$mq_sql = $mquery->get_sql( 'term', 't', 'term_id' );
$meta_clauses = $mquery->get_clauses();
if ( ! empty( $meta_clauses ) ) {
$join .= $mq_sql['join'];
$where .= $mq_sql['where'];
$distinct .= "DISTINCT";
// 'orderby' support.
$allowed_keys = array();
$primary_meta_key = null;
$primary_meta_query = reset( $meta_clauses );
if ( ! empty( $primary_meta_query['key'] ) ) {
$primary_meta_key = $primary_meta_query['key'];
$allowed_keys[] = $primary_meta_key;
}
$allowed_keys[] = 'meta_value';
$allowed_keys[] = 'meta_value_num';
$allowed_keys = array_merge( $allowed_keys, array_keys( $meta_clauses ) );
if ( ! empty( $args['orderby'] ) && in_array( $args['orderby'], $allowed_keys ) ) {
switch( $args['orderby'] ) {
case $primary_meta_key:
case 'meta_value':
if ( ! empty( $primary_meta_query['type'] ) ) {
$orderby = "ORDER BY CAST({$primary_meta_query['alias']}.meta_value AS {$primary_meta_query['cast']})";
} else {
$orderby = "ORDER BY {$primary_meta_query['alias']}.meta_value";
}
break;
case 'meta_value_num':
$orderby = "ORDER BY {$primary_meta_query['alias']}.meta_value+0";
break;
default:
if ( array_key_exists( $args['orderby'], $meta_clauses ) ) {
// $orderby corresponds to a meta_query clause.
$meta_clause = $meta_clauses[ $args['orderby'] ];
$orderby = "ORDER BY CAST({$meta_clause['alias']}.meta_value AS {$meta_clause['cast']})";
}
break;
}
}
}
$selects = array();

2
wp-includes/version.php
View File

@ -4,7 +4,7 @@
*
* @global string $wp_version
*/
$wp_version = '4.5-alpha-36484';
$wp_version = '4.5-alpha-36485';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.