MDL-15904 fixed assignment reset

mod/assignment/lib.php

@@ -1905,9 +1905,7 @@ class assignment_base {
                                 WHERE a.course=? AND a.assignmenttype=?";
             $params = array($data->courseid, $this->type);
 
-            $DB->delete_records_select('assignment_submissions', "assignment IN ($assignmentssql)", $params);
-
-            // now get rid of all attachments
+            // now get rid of all submissions and responses
             $fs = get_file_storage();
             if ($assignments = $DB->get_records_sql($assignmentssql, $params)) {
                 foreach ($assignments as $assignmentid=>$unused) {
@@ -1920,6 +1918,8 @@ class assignment_base {
                 }
             }
 
+            $DB->delete_records_select('assignment_submissions', "assignment IN ($assignmentssql)", $params);
+
             $status[] = array('component'=>$componentstr, 'item'=>get_string('deleteallsubmissions','assignment').': '.$typestr, 'error'=>false);
 
             if (empty($data->reset_gradebook_grades)) {