fix pagination for users index jsonapi route, fixes #4844

Closes #4844

Merge request studip/studip!3630

lib/classes/JsonApi/Routes/Users/UsersIndex.php

@@ -35,8 +35,8 @@ class UsersIndex extends JsonApiController
         $this->validateFilters();
         $filters = $this->getFilters();
 
-        list($offset, $limit) = $this->getOffsetAndLimit();
-        $partSQL = \GlobalSearchUsers::getSQL($filters['search'], [], $limit + $offset);
+        [$offset, $limit] = $this->getOffsetAndLimit();
+        $partSQL = \GlobalSearchUsers::getSQL($filters['search'], [], "{$offset}, {$limit}");
         $search_result = \DBManager::get()->fetchAll($partSQL);
         $total = (int) \DBManager::get()->fetchColumn('SELECT FOUND_ROWS() as found_rows');
 

lib/classes/globalsearch/GlobalSearchUsers.php

@@ -29,6 +29,11 @@ class GlobalSearchUsers extends GlobalSearchModule implements GlobalSearchFullte
      * @param string $search the input query string
      * @param array $filter an array with search limiting filter information (e.g. 'category', 'semester', etc.)
      * @return string SQL Query to discover elements for the search
+     *
+     * @todo If the signature of this method changes, the UsersIndex jsonapi
+     *       route must also be taken into account. The route adds another
+     *       parameter so that offset and limit can be used.
+     * @see \JsonApi\Routes\Users\UsersIndex::__invoke
      */
     public static function getSQL($search, $filter, $limit)
     {