fix detail

@@ -147,20 +147,22 @@ export default {
         }
       }
 
+      if (!get(result, 'data.total')) {
+        this.empty = true;
+      } else {
+        this.empty = false;
+      }
+
       return result;
     },
     async fetchComments(pre) {
       const result = await this.fetchCommentsAsync(pre);
-      let dirty = false;
+      let dirty = true;
 
       if (result.code === 200) {
         const comments = get(result, 'data.commentInfos', []);
 
-        if (!get(result, 'data.total')) {
-          this.empty = true;
-        } else {
         if (comments.length) {
-            this.empty = false;
           this.$emit('on-page-change', {
             page: result.data.page,
             size: result.data.total
@@ -190,8 +192,8 @@ export default {
               this.commentList = this.commentList.concat(comments);
             }
           }
-            dirty = true;
-          }
+        } else {
+          dirty = false;
         }
 
         this.firstLoading = false;