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Multisite: improve sites_pre_query and networks_pre_query filters, avoiding db queries.

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Improve the `pre_query` filters in multisite classes introduced in r44983. Return (non null) values immediately,
avoiding the database queries entirely, similar to other `pre_query` filters.

Props spacedmonkey, SergeyBiryukov, felipeelia.
Fixes #47599.



git-svn-id: https://develop.svn.wordpress.org/trunk@46100 602fd350-edb4-49c9-b593-d223f7449a82
This commit is contained in:
Adam Silverstein
2019-09-12 22:16:08 +00:00
parent b979a99355
commit 2b4cecf316
4 changed files with 79 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
src/wp-includes/class-wp-site-query.php
View File

@@ -288,50 +288,57 @@ class WP_Site_Query {
$this->meta_query_clauses = $this->meta_query->get_sql( 'blog', $wpdb->blogs, 'blog_id', $this );
}
$site_ids = null;
$site_data = null;
/**
* Filter the sites array before the query takes place.
* Filter the site data before the get_sites query takes place.
*
* Return a non-null value to bypass WordPress's default site queries.
*
* The expected return type from this filter depends on the value passed in the request query_vars:
* When `$this->query_vars['count']` is set, the filter should return the site count as an int.
* When `'ids' == $this->query_vars['fields']`, the filter should return an array of site ids.
* Otherwise the filter should return an array of WP_Site objects.
*
* @since 5.2.0
*
* @param array|null $site_ids Return an array of site data to short-circuit WP's site query,
* or null to allow WP to run its normal queries.
* @param WP_Site_Query $this The WP_Site_Query instance, passed by reference.
* @param array|int|null $site_data Return an array of site data to short-circuit WP's site query,
* the site count as an integer if `$this->query_vars['count']` is set,
* or null to run the normal queries.
* @param WP_Site_Query $this The WP_Site_Query instance, passed by reference.
*/
$site_ids = apply_filters_ref_array( 'sites_pre_query', array( $site_ids, &$this ) );
$site_data = apply_filters_ref_array( 'sites_pre_query', array( $site_data, &$this ) );
if ( null === $site_ids ) {
if ( null !== $site_data ) {
return $site_data;
}
// $args can include anything. Only use the args defined in the query_var_defaults to compute the key.
$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );
// $args can include anything. Only use the args defined in the query_var_defaults to compute the key.
$_args = wp_array_slice_assoc( $this->query_vars, array_keys( $this->query_var_defaults ) );
// Ignore the $fields argument as the queried result will be the same regardless.
unset( $_args['fields'] );
// Ignore the $fields argument as the queried result will be the same regardless.
unset( $_args['fields'] );
$key = md5( serialize( $_args ) );
$last_changed = wp_cache_get_last_changed( 'sites' );
$key = md5( serialize( $_args ) );
$last_changed = wp_cache_get_last_changed( 'sites' );
$cache_key = "get_sites:$key:$last_changed";
$cache_value = wp_cache_get( $cache_key, 'sites' );
$cache_key = "get_sites:$key:$last_changed";
$cache_value = wp_cache_get( $cache_key, 'sites' );
if ( false === $cache_value ) {
$site_ids = $this->get_site_ids();
if ( $site_ids ) {
$this->set_found_sites();
}
$cache_value = array(
'site_ids' => $site_ids,
'found_sites' => $this->found_sites,
);
wp_cache_add( $cache_key, $cache_value, 'sites' );
} else {
$site_ids = $cache_value['site_ids'];
$this->found_sites = $cache_value['found_sites'];
if ( false === $cache_value ) {
$site_ids = $this->get_site_ids();
if ( $site_ids ) {
$this->set_found_sites();
}
$cache_value = array(
'site_ids' => $site_ids,
'found_sites' => $this->found_sites,
);
wp_cache_add( $cache_key, $cache_value, 'sites' );
} else {
$site_ids = $cache_value['site_ids'];
$this->found_sites = $cache_value['found_sites'];
}
if ( $this->found_sites && $this->query_vars['number'] ) {