fix bug

apps/exams/Lib/Action/AdminPaperAction.class.php

@@ -172,6 +172,13 @@ class AdminPaperAction extends AdministratorAction
             // }else{
                 $data['level']         = intval($_POST['level']);
             // }
+
+            $attache_id = '';
+            $attache_ids = explode('|', $_POST['attachment_ids']);
+            if (!empty($attache_ids)) {
+                $attache_id = array_pop(array_filter($attache_ids));
+            }
+            $data['attachment']        = $attache_id;
             $data['reply_time']        = intval($_POST['reply_time']);
             $data['exams_module_id']   = intval($_POST['exams_module_id']);
             $data['exams_paper_title'] = t($_POST['exams_paper_title']);
@@ -196,7 +203,7 @@ class AdminPaperAction extends AdministratorAction
             }
             exit;
         }
-        $this->pageKeyList = ['exams_subject_id', 'exams_module_id', 'level', 'exams_paper_title', 'reply_time', 'exams_limit','best', 'is_rand', 'start_time', 'end_time', 'assembly_type', 'is_screen','price', 'show_user_group', 'sort', 'description'];
+        $this->pageKeyList = ['exams_subject_id', 'exams_module_id', 'level', 'exams_paper_title', 'reply_time', 'exams_limit','best', 'is_rand', 'start_time', 'end_time', 'assembly_type', 'is_screen','attachment', 'price', 'show_user_group', 'sort', 'description'];
         $this->notEmpty    = ['exams_paper_id', 'exams_subject_id', 'exams_module_id', 'level', 'exams_paper_title', 'reply_time'];
         ob_start();
         echo W('CategoryLevel', array('table' => 'exams_subject', 'id' => 'exams_subject_id'));