Merge branch 'dev_aliyun' into dev_cxt

app/views/shixun_lists/index.json.jbuilder

@@ -9,11 +9,11 @@ json.shixun_list do
     reg = /^[，。？：；‘’！“”—……、]/
     # 附件的替换
     atta_reg = /!\[\]\(\/api\/attachments\/\d+\)/
-    highlights[:description]&.first&.sub!(reg, '').sub!(atta_reg, '')
-    highlights[:content]&.first&.sub!(reg, '').sub!(atta_reg, '')
+    highlights[:description]&.first&.sub!(reg, '')&.sub!(atta_reg, '')
+    highlights[:content]&.first&.sub!(reg, '')&.sub!(atta_reg, '')
 
     json.title highlights.delete(:name)&.join('...') || obj.searchable_title
-    json.description highlights[:description]&.join('...') || Util.extract_content(obj.description)[0..300].sub!(atta_reg, '')
+    json.description highlights[:description]&.join('...') || Util.extract_content(obj.description)[0..300]&.sub!(atta_reg, '')
 
     json.content highlights
     json.level level_to_s(obj.trainee)