bug fixed

src/main/java/cn/chnmuseum/party/web/controller/ChinaMobileRestApiController.java

@@ -608,9 +608,11 @@ public class ChinaMobileRestApiController extends BaseController {
                     .eq(LearningContent::getPublished, true).orderByDesc(LearningContent::getSortorder);
             lambdaQueryWrapper.select(LearningContent::getName, LearningContent::getCover);
             List<LearningContent> learningContentList = this.learningContentService.list(lambdaQueryWrapper);
-            String learningContentNames = learningContentList.stream().map(LearningContent::getName).collect(Collectors.joining("、"));
-            learningProject.setThumbnail(learningContentList.get(0).getCover());
-            learningProject.setLearningContentNames(learningContentNames);
+            if (!learningContentList.isEmpty()) {
+                String learningContentNames = learningContentList.stream().map(LearningContent::getName).collect(Collectors.joining("、"));
+                learningProject.setThumbnail(learningContentList.get(0).getCover());
+                learningProject.setLearningContentNames(learningContentNames);
+            }
         }
         return getResult(page);
     }