解决issue详情性能N+1问题

app/controllers/issues_controller.rb

@@ -132,16 +132,13 @@ class IssuesController < ApplicationController
       User.current.at_messages.unviewed('Journal', j.id).each {|x| x.viewed!}
     end
 
-    # 缺陷状态更新
-    query_journals = @issue.journals
-      query_journals.each do |query_journal|
-        query_journal.forge_messages.each do |f|
-          if User.current.id == f.user_id
-            f.update_attributes(:viewed => true)
-          end
-        end
-      end
-    # end
+    # 缺陷状态消息更新
+    query_journals_ids = @issue.journals.map{|journal| journal.id}
+    if query_journals_ids.length > 0
+      query_journals = ForgeMessage.where("user_id =? and forge_message_type =? and forge_message_id in (#{query_journals_ids.join(",")})", User.current.id, "Journal")
+      query_journals.update_all(:viewed => true)
+    end
+
     @jour_reply = Journal.new
     @journals = @issue.journals.includes(:user, :details).reorder("#{Journal.table_name}.id ASC").all
     @journals.each_with_index {|j,i| j.indice = i+1}