update

mec-biz/src/main/resources/config/mybatis/CourseScheduleMapper.xml

@@ -442,7 +442,7 @@
         WHERE
           cs.class_date_ = DATE_FORMAT(#{classDate},'%Y%m%d')
         AND cssp.user_id_ = #{studentId}
-        <if test="quitClassGroupIds.size()>0">
+        <if test="quitClassGroupIds != null and quitClassGroupIds.size()>0">
             AND cssp.class_group_id_ NOT IN
             <foreach collection="quitClassGroupIds" item="quitClassGroupId" open="(" close=")" separator=",">
                 #{quitClassGroupId}