# Active Record forgets methods! bug? **URL:** \ **Category:** Rails\ **Created:** [January 23, 2008, 1:16am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877 "2008-01-23T01:16:03Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 1:16am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/1 "2008-01-23T01:16:03Z")
I have created a rails app. When in development mode, I hit a problem the second time I try to display a page from a particular controller: it raises a method\_missing exception because suddenly the model I am trying to use has forgotten about all the methods I added to it, and all its association methods (from has\_one and has\_many). Inspecting the model shows that it still has it’s @attributes array. In production mode, it works fine. Same result on Rails 1.x and 2.0.2. Below is an example exception. In my DB, System has\_many test\_results. Any ideas? Thanks, -Sam. undefined method `test\_results’ for #System:0x2521eb0 RAILS\_ROOT: /Users/sam/Development/ideas/trunk/spierson/pbits/server/pbits2 Application Trace | Framework Trace | Full Trace /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active\_record/attribute\_methods.rb:205:in `method_missing' app/controllers/results_controller.rb:34:in`report’ /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active\_record/associations/association\_proxy.rb:125:in `each' /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/associations/association_proxy.rb:125:in`send’ /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active\_record/associations/association\_proxy.rb:125:in `method_missing' /Library/Ruby/Gems/1.8/gems/activerecord-2.0.2/lib/active_record/associations/has_many_through_association.rb:133:in`method\_missing\_without\_paginate’ vendor/plugins/will\_paginate/lib/will\_paginate/finder.rb:93:in `method_missing' app/controllers/results_controller.rb:32:in`report’ /Library/Ruby/Gems/1.8/gems/actionpack-2.0.2/lib/action\_controller/base.rb:1158:in `send’ \ ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 7:00am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/2 "2008-01-23T07:00:15Z")
This is because of the file loading problem in development mode. So for this, add the following statement on top of the ‘system.rb’ file. requrie ‘test\_result.rb’ Use the file names that you are using. I have given the file names in assumption. I hope it will work. Because I have experienced the same problem. - Karthik. ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 8:15am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/3 "2008-01-23T08:15:28Z")
Sorry Karthink -\> Karthik ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 8:14am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/4 "2008-01-23T08:14:20Z")
Many thanks for your suggestion Karthink. That was a good idea: require ‘test\_result’ was indeed missing from system.rb Unfortunately this did not solve the problem. Something more sinister is going on. -Sam. ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 8:21am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/5 "2008-01-23T08:21:50Z")
I dont know what else the problem is. Did you restart the server after adding the statement? If not, please try that also. ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 8:35am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/6 "2008-01-23T08:35:40Z")
Karthi kn wrote: > Did you restart the server after adding the statement? If not, please > try that also. Yes. Twice 🙂 ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 8:37am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/7 "2008-01-23T08:37:29Z")
Can you show that controller code here? ---
**Author:** ![sdpurtill](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/s/77aa72/32.png) [@sdpurtill](https://www.ruby-forum.com/u/sdpurtill)\ **Post date:** [January 23, 2008, 8:52am UTC](https://www.ruby-forum.com/t/active-record-forgets-methods-bug/126877/8 "2008-01-23T08:52:41Z")
Karthi kn wrote: > Can you show that controller code here? No need - you cracked it! I went further and put in appropriate require statements for EVERY association in EVERY model. That fixed it. I have some 2-step joins (using :through) and I think one of those maybe was causing the problem. Many thanks for your help! -Sam.