Ticket #15292: 16573.diff

wp-includes/meta.php

@@ -387 +387 @@
         $i = 0;
         foreach ( $meta_query as $q ) {
                 $meta_key = isset( $q['key'] ) ? trim( $q['key'] ) : '';
-                $meta_value = isset( $q['value'] ) ? $q['value'] : '';
                 $meta_compare = isset( $q['compare'] ) ? strtoupper( $q['compare'] ) : '=';
                 $meta_type = isset( $q['type'] ) ? strtoupper( $q['type'] ) : 'CHAR';
 
@@ -413 +412 @@
                 if ( !empty( $meta_key ) )
                         $where .= $wpdb->prepare( " AND $alias.meta_key = %s", $meta_key );
 
+                if ( !isset( $q['value'] ) )
+                        continue;
+                $meta_value = $q['value'];
+
                 if ( in_array( $meta_compare, array( 'IN', 'NOT IN', 'BETWEEN', 'NOT BETWEEN' ) ) ) {
                         if ( ! is_array( $meta_value ) )
-                                $meta_value = preg_split( '/[,\s]+/', $meta_value );
+                                $meta_value = array_filter( preg_split( '/[,\s]+/', $meta_value ) );
+
+                        if ( empty( $meta_value ) )
+                                continue;
                 } else {
                         $meta_value = trim( $meta_value );
                 }
 
-                if ( empty( $meta_value ) )
-                        continue;
-
                 if ( 'IN' == substr( $meta_compare, -2) ) {
                         $meta_compare_string = '(' . substr( str_repeat( ',%s', count( $meta_value ) ), 1 ) . ')';
                 } elseif ( 'BETWEEN' == substr( $meta_compare, -7) ) {
@@ -457 +460 @@
         $meta_query = array();
 
         // Simple query needs to be first for orderby=meta_value to work correctly
-        foreach ( array( 'key', 'value', 'compare', 'type' ) as $key ) {
+        foreach ( array( 'key', 'compare', 'type' ) as $key ) {
                 if ( !empty( $qv[ "meta_$key" ] ) )
                         $meta_query[0][ $key ] = $qv[ "meta_$key" ];
         }
 
+        // WP_Query sets 'meta_value' = '' by default
+        if ( isset( $qv[ 'meta_value' ] ) && '' !== $qv[ 'meta_value' ] )
+                $meta_query[0]['value'] = $qv[ 'meta_value' ];
+
         if ( !empty( $qv['meta_query'] ) && is_array( $qv['meta_query'] ) ) {
                 $meta_query = array_merge( $meta_query, $qv['meta_query'] );
         }