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src/main/java/com/server/web/common/service/Impl/CourseServiceImpl.java

@@ -46,7 +46,7 @@ public class CourseServiceImpl implements CourseService {
 
     @Override
     public void updateCourse(TKzyCourse course, String classIds) {
-        courseMapper.updateByPrimaryKeySelective(course);
+        courseMapper.updateByPrimaryKeyWithBLOBs(course);
         TKzyRelationClassExample example = new TKzyRelationClassExample();
         example.createCriteria().andRelationIdEqualTo(course.getId()).andTypeEqualTo(1);
         relationClassMapper.deleteByExample(example);