消息列表中的at消息报500

app/controllers/issues_controller.rb

@@ -521,10 +521,10 @@ class IssuesController < ApplicationController
   def delete_journal
      @issue = Issue.find(params[:id])
      begin
-       forge_acts = ForgeMessage.where(:forge_message_type => "Journal", :forge_message_id => params[:journal_id]).first
+       forge_acts = ForgeMessage.where(:forge_message_type => "Journal", :forge_message_id => params[:journal_id])
-       forge_acts.destroy unless forge_acts.nil?
+       forge_acts.destroy_all unless forge_acts.empty?
-       at_message = AtMessage.where(:at_message_type => "Journal", :at_message_id => params[:journal_id]).first
+       at_message = AtMessage.where(:at_message_type => "Journal", :at_message_id => params[:journal_id])
-       at_message.destroy unless at_message.nil?
+       at_message.destroy_all unless at_message.empty?
        Journal.delete(params[:journal_id])
      rescue Exception => e
        puts e

db/migrate/20160830090214_delete_null_at_messages.rb

@@ -0,0 +1,17 @@
+class DeleteNullAtMessages < ActiveRecord::Migration
+  def up
+    count = AtMessage.all.count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+      AtMessage.page(i).per(30).each do |am|
+        if am.at_message.nil?
+          am.destroy
+        end
+      end
+      end
+    end
+  end
+
+  def down
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20160824073554) do
+ActiveRecord::Schema.define(:version => 20160830090214) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false