fix 班级人数

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

@@ -1794,6 +1794,8 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
         String classGroupIds = classGroups.stream().map(classGroup -> classGroup.getId().toString()).collect(Collectors.joining(","));
 
         List<ClassGroupTeacherMapper> classGroupTeachers = classGroupTeacherMapperDao.findClassGroupTeachers(classGroupIds);
+        Map<Integer, Integer> studyNums = JSONObject.parseObject(JSONObject.toJSONString(MapUtil.convertIntegerMap(classGroupDao.countStudyNum(classGroupIds))), HashMap.class);
+
         for (ClassGroupTeachersDto classGroup : classGroups) {
             List<ClassGroupTeacherMapper> classGroupTeacherMappers = new ArrayList<>();
             for (ClassGroupTeacherMapper classGroupTeacher : classGroupTeachers) {
@@ -1801,6 +1803,7 @@ public class ClassGroupServiceImpl extends BaseServiceImpl<Integer, ClassGroup>
                 classGroupTeacherMappers.add(classGroupTeacher);
             }
             classGroup.setClassGroupTeacherMapperList(classGroupTeacherMappers);
+            classGroup.setStudentNum(studyNums.get(classGroup.getId()));
         }
         return classGroups;
     }