fixed bug

src/main/java/com/qkdata/biz/management/service/CourseService.java

@@ -451,7 +451,11 @@ public class CourseService extends ServiceImpl<CourseMapper, CoursePO> {
             if (CollUtil.isEmpty(model.getUserTagIds())){
                 throw new BusinessException("请选择用户标签");
             }
-            po.setUserTagIds(ArrayUtil.join(model.getTagIds(),","));
+            List<String> ids = Lists.newArrayList();
+            for (Long userTagId : model.getUserTagIds()){
+                ids.add(String.valueOf(userTagId));
+            }
+            po.setUserTagIds(String.join(",",ids));
         }else {
             po.setUserTagIds("");
         }

src/main/java/com/qkdata/biz/management/vo/CourseDetailModel.java

@@ -97,4 +97,5 @@ public class CourseDetailModel {
      * 课程附件列表
      */
     private List<CourseAttachmentModel> attachmentList;
+    private String userTagIds;
 }