Merge branch 'dev_aliyun' of https://bdgit.educoder.net/Hjqreturn/educoder into dev_aliyun

app/services/private_messages/create_service.rb

@@ -30,6 +30,6 @@ class PrivateMessages::CreateService < ApplicationService
 
   def validate!
     raise Error, '内容不能为空' if content.blank?
-    raise Error, '内容太长' if content.size > 255
+    raise Error, '内容太长' if content.size > 500
   end
 end