diff --git a/app/models/platform_communicate.rb b/app/models/platform_communicate.rb
index a8673756..8ce7512a 100644
--- a/app/models/platform_communicate.rb
+++ b/app/models/platform_communicate.rb
@@ -21,11 +21,11 @@ class PlatformCommunicate < ApplicationRecord
   has_many :watchers, as: :watchable, dependent: :destroy
 
   def watched_ext_info(user_id)
-    ext_info = self.watchers.find_by(user_id: user_id)
-    return [] if ext_info.blank?
+    watcher = self.watchers.find_by(user_id: user_id)
+    return [] if watcher.blank?
     str = []
     self.enroll_field.to_s.split(",").each_with_index do |m, index|
-      str.push("#{ext_info["ext#{index + 1}"]}")
+      str.push("#{watcher.ext_info["ext#{index + 1}"]}")
     end
     str
   end