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introduce _wp_meta_sql(). Preparation for adding blog_id to WP_User_Query. See #14572

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git-svn-id: https://develop.svn.wordpress.org/trunk@15565 602fd350-edb4-49c9-b593-d223f7449a82
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scribu
2010-09-05 13:31:33 +00:00
parent af29b5d5cf
commit 529a40e2b8
2 changed files with 71 additions and 16 deletions
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50
wp-includes/functions.php
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@@ -4218,6 +4218,56 @@ function _wp_search_sql($string, $cols) {
return ' AND (' . implode(' OR ', $searches) . ')';
}
/*
* Used internally to generate an SQL string for searching across multiple meta key = value pairs
*
* @access private
* @since 3.1.0
*
* @param array $queries An array of queries
* @return string
*/
function _wp_meta_sql( $queries, $meta_id_column, $table ) {
global $wpdb;
$clauses = array();
foreach ( $queries as $query ) {
$meta_key = trim( @$query['meta_key'] );
$meta_value = trim( @$query['meta_value'] );
$meta_compare = @$query['meta_compare'];
if ( empty( $meta_compare ) || !in_array( $meta_compare, array( '=', '!=', '>', '>=', '<', '<=', 'like' ) ) )
$meta_compare = '=';
if ( empty( $meta_key ) )
continue;
$clause = $wpdb->prepare( "WHEN %s THEN meta_value ", $meta_key );
if ( empty( $meta_value ) ) {
$clauses[] = $clause . "IS NOT NULL";
} elseif ( 'like' == $meta_compare ) {
$clauses[] = $clause . $wpdb->prepare( "LIKE %s", '%' . like_escape( $meta_value ) . '%' );
} else {
$clauses[] = $clause . $wpdb->prepare( "$meta_compare %s", $meta_value );
}
}
if ( empty( $clauses ) )
return '';
return "
SELECT $meta_id_column
FROM $table
WHERE CASE meta_key
" . implode( "\n", $clauses ) . "
END
GROUP BY $meta_id_column
HAVING COUNT(*) = " . count( $clauses );
}
/*
* Used internally to tidy up the search terms
*