# Stack level too deep **URL:** \ **Category:** Rails\ **Created:** [April 17, 2009, 9:34am UTC](https://www.ruby-forum.com/t/stack-level-too-deep/165768 "2009-04-17T09:34:25Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![chirantan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/eb9ed0/32.png) [@chirantan](https://www.ruby-forum.com/u/chirantan)\ **Post date:** [April 17, 2009, 9:34am UTC](https://www.ruby-forum.com/t/stack-level-too-deep/165768/1 "2009-04-17T09:34:25Z")
In my application there are 2 models - Profile and Topic. Profiles can be attached to topics and hence I have a many to many relationship between them. Things were good until recently I encountered a problem that said “stack level too deep”. I’m using Rails 2.2.2 and Ruby 1.8.6 My controller method looks like this: def show @topic = Topic.find(params[:id]) @attachments = @topic.profiles end Looks pretty trivial. On the view, I am iterating through the attachments and calling a partial by sending every attachment as a local variable My view looks like this - \<% for profile in @attachments %\> \<% p profile %\> \<% p profile.id %\> \<% p session[:user] %\> \<% onclick\_expand = “expand(‘show\_chart\_button\_# {profile.id}’,‘attached\_chart#{profile.id}’)” if session[:user] %\> \<%#= current\_user ? (render :partial=\>’/profile/ chart\_partial’, :locals =\> {:profile =\> profile}) : “Please \login to view the chart.” -%\> \<% end %\> However, even before the partial is called, I get “stack level too deep error”, on lines where I try to inspect the profile object and its attributes, after waiting for a long time. Before inspecting the profile object, I was getting the same error on line no. 33 (See the log below) My log looks like this - ActionView::TemplateError (stack level too deep) on line #31 of app/ views/topic/_attachments.html.erb: 28:_ _ **Topic Attachments** _ _29: \<% for profile in @attachments %\> 30: \<% p profile %\> 31: \<% p profile.id %\> 32: \<% p session[:user] %\> 33: \<% onclick\_expand = "expand('show\_chart\_button_# {profile.id}’,‘attached\_chart#{profile.id}’)" if session[:user] %\> 34: vendor/rails/activerecord/lib/active\_record/attribute\_methods.rb: 249:in `method_missing' vendor/plugins/authorization/lib/publishare/identity.rb:106:in`method\_missing’ vendor/rails/activerecord/lib/active\_record/attribute\_methods.rb: 249:in `method_missing' vendor/plugins/authorization/lib/publishare/identity.rb:106:in`method\_missing’ vendor/rails/activerecord/lib/active\_record/attribute\_methods.rb: 249:in `method_missing' vendor/plugins/authorization/lib/publishare/identity.rb:106:in`method\_missing’ vendor/rails/activerecord/lib/active\_record/attribute\_methods.rb: 249:in `method_missing' vendor/plugins/authorization/lib/publishare/identity.rb:106:in`method\_missing’ vendor/rails/activerecord/lib/active\_record/attribute\_methods.rb: 249:in `method_missing' vendor/plugins/authorization/lib/publishare/identity.rb:106:in`method\_missing’ vendor/rails/activerecord/lib/active\_record/attribute\_methods.rb: 249:in `method_missing' vendor/plugins/authorization/lib/publishare/identity.rb:106:in`method\_missing’ _**(These entries appear in the log hundreds of times followed by the ones below)**_ ``` app/views/topic/_attachments.html.erb:31 vendor/rails/activerecord/lib/active_record/associations/ ``` association\_collection.rb:359:in `method_missing_without_paginate' vendor/rails/activerecord/lib/active_record/associations/ association_proxy.rb:212:in`method\_missing’ vendor/rails/activerecord/lib/active\_record/associations/ association\_proxy.rb:212:in `each' vendor/rails/activerecord/lib/active_record/associations/ association_proxy.rb:212:in`send’ vendor/rails/activerecord/lib/active\_record/associations/ association\_proxy.rb:212:in `method_missing' vendor/rails/activerecord/lib/active_record/associations/ association_collection.rb:359:in`method\_missing\_without\_paginate’ vendor/plugins/will\_paginate/lib/will\_paginate/finder.rb:167:in `method_missing' app/views/topic/_attachments.html.erb:29 vendor/rails/actionpack/lib/action_view/renderable.rb:39:in`send’ vendor/rails/actionpack/lib/action\_view/renderable.rb:39:in `render' vendor/rails/actionpack/lib/action_view/renderable_partial.rb: 20:in`render’ vendor/rails/actionpack/lib/action\_controller/benchmarking.rb: 26:in `benchmark' config/environment.rb:145:in`realtime’ vendor/rails/actionpack/lib/action\_controller/benchmarking.rb: 26:in `benchmark' vendor/rails/actionpack/lib/action_view/renderable_partial.rb: 19:in`render’ vendor/rails/actionpack/lib/action\_view/template.rb:73:in `render_template' vendor/rails/actionpack/lib/action_view/renderable_partial.rb: 45:in`render\_partial’ vendor/rails/actionpack/lib/action\_view/partials.rb:152:in `render_partial' vendor/rails/actionpack/lib/action_view/base.rb:258:in`render’ app/views/topic/show.html.erb:30 vendor/rails/actionpack/lib/action\_view/renderable.rb:39:in `send' vendor/rails/actionpack/lib/action_view/renderable.rb:39:in`render’ vendor/rails/actionpack/lib/action\_view/template.rb:73:in `render_template' vendor/rails/actionpack/lib/action_view/base.rb:256:in`render’ vendor/rails/actionpack/lib/action\_view/base.rb:367:in `_render_with_layout' vendor/rails/actionpack/lib/action_view/base.rb:254:in`render’ vendor/rails/actionpack/lib/action\_controller/base.rb:1174:in `render_for_file' vendor/rails/actionpack/lib/action_controller/base.rb:905:in`render\_without\_benchmark’ vendor/rails/actionpack/lib/action\_controller/benchmarking.rb: 51:in `render' config/environment.rb:145:in`realtime’ vendor/rails/actionpack/lib/action\_controller/benchmarking.rb: 51:in `render' vendor/rails/actionpack/lib/action_controller/mime_responds.rb: 135:in`send’ vendor/rails/actionpack/lib/action\_controller/mime\_responds.rb: 135:in `custom' vendor/rails/actionpack/lib/action_controller/mime_responds.rb: 160:in`call’ vendor/rails/actionpack/lib/action\_controller/mime\_responds.rb: 160:in `respond' vendor/rails/actionpack/lib/action_controller/mime_responds.rb: 158:in`each’ vendor/rails/actionpack/lib/action\_controller/mime\_responds.rb: 158:in `respond' vendor/rails/actionpack/lib/action_controller/mime_responds.rb: 107:in`respond\_to’ vendor/plugins/forums/lib/topic\_controller.rb:55:in `show' vendor/rails/actionpack/lib/action_controller/base.rb:1253:in`send’ vendor/rails/actionpack/lib/action\_controller/base.rb:1253:in `perform_action_without_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:617:in`call\_filters’ vendor/rails/actionpack/lib/action\_controller/filters.rb:610:in `perform_action_without_benchmark' vendor/rails/actionpack/lib/action_controller/benchmarking.rb: 68:in`perform\_action\_without\_rescue’ F:/ruby/lib/ruby/1.8/benchmark.rb:293:in `measure' vendor/rails/actionpack/lib/action_controller/benchmarking.rb: 68:in`perform\_action\_without\_rescue’ vendor/rails/actionpack/lib/action\_controller/rescue.rb:136:in `perform_action_without_caching' vendor/rails/actionpack/lib/action_controller/caching/sql_cache.rb: 13:in`perform\_action’ vendor/rails/activerecord/lib/active\_record/connection\_adapters/ abstract/query\_cache.rb:34:in `cache' vendor/rails/activerecord/lib/active_record/query_cache.rb:8:in`cache’ vendor/rails/actionpack/lib/action\_controller/caching/sql\_cache.rb: 12:in `perform_action' vendor/rails/actionpack/lib/action_controller/base.rb:524:in`send’ vendor/rails/actionpack/lib/action\_controller/base.rb:524:in `process_without_filters' vendor/rails/actionpack/lib/action_controller/filters.rb:606:in`process\_without\_session\_management\_support’ vendor/rails/actionpack/lib/action\_controller/ session\_management.rb:134:in `process' vendor/rails/actionpack/lib/action_controller/base.rb:392:in`process’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:183:in `handle_request' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:110:in`dispatch\_unlocked’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:123:in `dispatch' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:122:in`synchronize’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:122:in `dispatch' vendor/rails/actionpack/lib/action_controller/dispatcher.rb:132:in`dispatch\_cgi’ vendor/rails/actionpack/lib/action\_controller/dispatcher.rb:39:in `dispatch' vendor/rails/railties/lib/webrick_server.rb:103:in`handle\_dispatch’ vendor/rails/railties/lib/webrick\_server.rb:74:in `service' F:/ruby/lib/ruby/1.8/webrick/httpserver.rb:104:in`service’ F:/ruby/lib/ruby/1.8/webrick/httpserver.rb:65:in `run' F:/ruby/lib/ruby/1.8/webrick/server.rb:173:in`start\_thread’ F:/ruby/lib/ruby/1.8/webrick/server.rb:162:in `start' F:/ruby/lib/ruby/1.8/webrick/server.rb:162:in`start\_thread’ F:/ruby/lib/ruby/1.8/webrick/server.rb:95:in `start' F:/ruby/lib/ruby/1.8/webrick/server.rb:92:in`each’ F:/ruby/lib/ruby/1.8/webrick/server.rb:92:in `start' F:/ruby/lib/ruby/1.8/webrick/server.rb:23:in`start’ F:/ruby/lib/ruby/1.8/webrick/server.rb:82:in `start' vendor/rails/railties/lib/webrick_server.rb:60:in`dispatch’ vendor/rails/railties/lib/commands/servers/webrick.rb:66 F:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `gem_original_require' F:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in`require’ vendor/rails/activesupport/lib/active\_support/dependencies.rb: 153:in `require' vendor/rails/activesupport/lib/active_support/dependencies.rb: 521:in`new\_constants\_in’ vendor/rails/activesupport/lib/active\_support/dependencies.rb: 153:in `require' vendor/rails/railties/lib/commands/server.rb:49 F:/ruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:31:in`gem\_original\_require’ F:/ruby/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:31:in `require’ script/server:3 I have no clue about why this is happening. This is something not complex at all and I have done it hundreds of times. Can someone please help me out here? Chirantan ---
**Author:** ![chirantan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/eb9ed0/32.png) [@chirantan](https://www.ruby-forum.com/u/chirantan)\ **Post date:** [April 17, 2009, 9:43am UTC](https://www.ruby-forum.com/t/stack-level-too-deep/165768/2 "2009-04-17T09:43:14Z")
Forgot to mention, Once I restart the server, for the first attempt, things work. But if try to reload the page without restarting the server. The error is seen again. ---
**Author:** ![chirantan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/eb9ed0/32.png) [@chirantan](https://www.ruby-forum.com/u/chirantan)\ **Post date:** [April 17, 2009, 10:02am UTC](https://www.ruby-forum.com/t/stack-level-too-deep/165768/3 "2009-04-17T10:02:34Z")
On Apr 17, 8:42 am, Chirantan [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > Forgot to mention, > > Once I restart the server, for the first attempt, things work. But if > try to reload the page without restarting the server. The error is > seen again. Does the problem only occur when config.cache\_classes = false ? If so then it’s likely a class reloading problem, by the looks of it the Profile class has been reloaded but you’re still holding onto an old copy of it. Possible causes of this include one of the classes being defined in a plugin or explicitly loading a class with require when you don’t need to (in this case i’d guess you have require ‘topic’ somewhere. Fred ---
**Author:** ![chirantan](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/eb9ed0/32.png) [@chirantan](https://www.ruby-forum.com/u/chirantan)\ **Post date:** [April 17, 2009, 12:23pm UTC](https://www.ruby-forum.com/t/stack-level-too-deep/165768/4 "2009-04-17T12:23:20Z")
You were right, Fred. When I changed config.cache\_classes to true, the problem disappeared. Need to dig in to determine the exact cause. But for now, since there is shortage of time and this has worked, I’m going to stop working on this issue. But will definitely try to fix this before the next release and post my findings here. Thanks a lot! C On Apr 17, 1:00 pm, Frederick C. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid)