/learningProject/delete 项目删除加上提示

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

@@ -148,6 +148,10 @@ public class LearningProjectController extends BaseController {
     public Map<String, Object> deleteLearningProject(@PathVariable("id") String id) {
         //按照王亭亭的要求 删除学习项目，不删除学习内容 所以注释掉下面一行代码
 //        this.learningContentService.remove(Wrappers.<LearningContent>lambdaUpdate().eq(LearningContent::getLearningProjectId, id));
+        int count = this.learningContentService.count(Wrappers.<LearningContent>lambdaUpdate().eq(LearningContent::getLearningProjectId, id).last("LIMIT 1"));
+        if (count >= 1) {
+            return getFailResult("该项目已有关联学习内容，不能删除");
+        }
         this.learningProjectService.removeById(id);
         return getSuccessResult();
     }