fix detail

@@ -147,51 +147,53 @@ 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.$emit('on-page-change', {
-              page: result.data.page,
-              size: result.data.total
-            });
+        if (comments.length) {
+          this.$emit('on-page-change', {
+            page: result.data.page,
+            size: result.data.total
+          });
 
-            if (pre) {
-              this.commentPreList.unshift(comments);
-              this.$nextTick(() => {
-                this.loadPreComment();
-              });
-            } else {
-              if (this.page <= 2) {
-                this.commentList = comments;
-
-                // 将评论滚动到可视区域
-                if (this.commentId) {
-                  setTimeout(() => {
-                    let scrollHeight = this.$refs.scroll.$el.offsetHeight;
-                    let dom = this.$refs.commentList.getElementsByClassName('comment-' + this.commentId);
-
-                    if (scrollHeight && dom.length && (dom[0].offsetHeight + dom[0].offsetTop > scrollHeight)) {
-                      this.$refs.scroll.scrollTo(0, scrollHeight - this.$refs.commentList.offsetHeight);
-                    }
-                  }, 500);
-                }
-              } else {
-                this.commentList = this.commentList.concat(comments);
+          if (pre) {
+            this.commentPreList.unshift(comments);
+            this.$nextTick(() => {
+              this.loadPreComment();
+            });
+          } else {
+            if (this.page <= 2) {
+              this.commentList = comments;
+
+              // 将评论滚动到可视区域
+              if (this.commentId) {
+                setTimeout(() => {
+                  let scrollHeight = this.$refs.scroll.$el.offsetHeight;
+                  let dom = this.$refs.commentList.getElementsByClassName('comment-' + this.commentId);
+
+                  if (scrollHeight && dom.length && (dom[0].offsetHeight + dom[0].offsetTop > scrollHeight)) {
+                    this.$refs.scroll.scrollTo(0, scrollHeight - this.$refs.commentList.offsetHeight);
+                  }
+                }, 500);
               }
+            } else {
+              this.commentList = this.commentList.concat(comments);
             }
-            dirty = true;
           }
+        } else {
+          dirty = false;
         }
 
         this.firstLoading = false;