update

pbl.js

@@ -2401,6 +2401,10 @@ router.route('/getCourseGroup').all((req, res, next) => {
 router.route('/joinCourseGroup').all((req, res, next) => {
     postmysql(req, res, "joinCourseGroup");
 });
+//退出分组
+router.route('/exitCourseGroup').all((req, res, next) => {
+    postmysql(req, res, "exitCourseGroup");
+});
 
 //加入分组
 router.route('/joinGroup').all((req, res, next) => {