根据id查询知识库数据，不返回contents字段

src/main/java/com/zzsn/knowbase/controller/KnowledgeController.java

@@ -90,6 +90,7 @@ public class KnowledgeController {
         if(knowledgeVO==null){
             return  Result.OK("nothing");
         }
+        knowledgeVO.setContents(null);
         if (null != knowledgeVO.getPublishDate() && (!knowledgeVO.getPublishDate().isEmpty())) {
             knowledgeVO.setPublishDate(EsDateUtil.esFieldDateMapping(knowledgeVO.getPublishDate()));
         }