add 网管课统计

mec-biz/src/main/java/com/ym/mec/biz/service/impl/ClassGroupServiceImpl.java

@@ -1004,7 +1004,10 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
             //剩余课程为显示陪练报告入口rul
             if(teacherClassGroupDto.getType() == ClassGroupTypeEnum.PRACTICE){
                 List<CourseScheduleEvaluate> courseScheduleEvaluates = courseScheduleEvaluateDao.findByClassGroupIds(classGroupIds);
-                Map<Integer, Long> reportMap = courseScheduleEvaluates.stream().collect(Collectors.toMap(CourseScheduleEvaluate::getClassGroupId, CourseScheduleEvaluate::getId));
+                Map<Integer, Long> reportMap = new HashMap<>();
+                if(courseScheduleEvaluates.size() >0 ) {
+                    reportMap = courseScheduleEvaluates.stream().collect(Collectors.toMap(CourseScheduleEvaluate::getClassGroupId, CourseScheduleEvaluate::getId));
+                }
                 if(reportMap.containsKey(teacherClassGroupDto.getClassGroupId().intValue())){
                     teacherClassGroupDto.setHasReport(true);
                     String studyReportUrl = sysConfigDao.findConfigValue(SysConfigService.STUDENT_STUDY_REPORT_URL);