# Stack level too deep **URL:** \ **Category:** Rails\ **Created:** [July 4, 2007, 10:45am UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515 "2007-07-04T10:45:33Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![mpalluat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ac8455/32.png) [@mpalluat](https://www.ruby-forum.com/u/mpalluat)\ **Post date:** [July 4, 2007, 10:45am UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515/1 "2007-07-04T10:45:33Z")
Hi, I have a SystemStackError. Here is the stack (sorry if it’s a little long) : app/models/line\_item.rb:14:in `product’ app/models/line\_item.rb:14:in `product’ app/controllers/store\_controller.rb:188:in `redirect\_to\_paypal’ /opt/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active\_record/associations/association\_proxy .rb:123:in `each’ /opt/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active\_record/associations/association\_proxy .rb:123:in `send’ /opt/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active\_record/associations/association\_proxy .rb:123:in `method\_missing’ /opt/local/lib/ruby/gems/1.8/gems/activerecord-1.15.3/lib/ active\_record/associations/has\_many\_association .rb:98:in `method\_missing’ app/controllers/store\_controller.rb:187:in `redirect\_to\_paypal’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/base.rb:1095:in `send’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/base.rb:1095:in `perform\_a ction\_without\_filters’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:632:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:638:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:438:in `call’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:637:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:638:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:438:in `call’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:637:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:638:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:438:in `call’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:637:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:638:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:438:in `call’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:637:in `call\_fi lter’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:619:in `perform \_action\_without\_benchmark’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/benchmarking.rb:66:in `per form\_action\_without\_rescue’ /opt/local/lib/ruby/1.8/benchmark.rb:293:in `measure’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/benchmarking.rb:66:in `per form\_action\_without\_rescue’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/rescue.rb:83:in `perform\_a ction’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/base.rb:430:in `send’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/base.rb:430:in `process\_wi thout\_filters’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/filters.rb:624:in `process \_without\_session\_management\_support’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/session\_management.rb:114:in `process’ /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/ action\_controller/base.rb:330:in `process’ /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/dispatcher.rb:41:in `dispatch’ /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb: 113:in `handle\_dispatch’ /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb: 79:in `service’ /opt/local/lib/ruby/1.8/webrick/httpserver.rb:104:in `service’ /opt/local/lib/ruby/1.8/webrick/httpserver.rb:65:in `run’ /opt/local/lib/ruby/1.8/webrick/server.rb:173:in `start\_thread’ /opt/local/lib/ruby/1.8/webrick/server.rb:162:in `start’ /opt/local/lib/ruby/1.8/webrick/server.rb:162:in `start\_thread’ /opt/local/lib/ruby/1.8/webrick/server.rb:95:in `start’ /opt/local/lib/ruby/1.8/webrick/server.rb:92:in `each’ /opt/local/lib/ruby/1.8/webrick/server.rb:92:in `start’ /opt/local/lib/ruby/1.8/webrick/server.rb:23:in `start’ /opt/local/lib/ruby/1.8/webrick/server.rb:82:in `start’ /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/webrick\_server.rb: 63:in `dispatch’ /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/servers/ webrick.rb:59 /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `gem\_original\_require’ /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require’ /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/ active\_support/dependencies.rb:495:in `req uire’ /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/ active\_support/dependencies.rb:342:in `new \_constants\_in’ /opt/local/lib/ruby/gems/1.8/gems/activesupport-1.4.2/lib/ active\_support/dependencies.rb:495:in `req uire’ /opt/local/lib/ruby/gems/1.8/gems/rails-1.2.3/lib/commands/server.rb: 39 /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `gem\_original\_require’ /opt/local/lib/ruby/site\_ruby/1.8/rubygems/custom\_require.rb:27:in `require’ script/server:3 This is the method that is being called : def redirect\_to\_paypal create\_order more\_options = Hash.new ``` x = 1 @order.line_items.each do |item| more_options["item_name_#{x}"] = item.product.title # this is ``` the line that is causing the error more\_options[“amount\_#{x}”] = item.product.price more\_options[“quantity\_#{x}”] = item.quantity x += 1 end ``` @html = render_to_string( :partial => "switch_to_paypal", :object ``` =\> @order, :locals =\> { :more\_options =\> more\_options } ) end Can someone figure out what is causing this error ? Thanks, Marc ---
**Author:** ![mpalluat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ac8455/32.png) [@mpalluat](https://www.ruby-forum.com/u/mpalluat)\ **Post date:** [July 4, 2007, 12:27pm UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515/2 "2007-07-04T12:27:39Z")
> ``` > @html = render_to_string( :partial => "switch_to_paypal", :object > > ``` > > =\> @order, :locals =\> { :more\_options =\> more\_options } ) > end i think it has to do with scope issues: when you call :more\_options to pass as a parameter, you’re creating a local variable, and passing it the local variable that already exists (but since it is the same variable-name, you are passing it the one you are creating, which is the one that already exists, which is … a stack way too deep.) i think. if you change the variable name you’ve created in the loop to something else, does it work? i.e ``` @order.line_items.each do |item| more_options_hsh["item_name_#{x}"] = item.product.title # this is ``` the line that is causing the error more\_options\_hsh[“amount\_#{x}”] = item.product.price more\_options\_hsh[“quantity\_#{x}”] = item.quantity and then … …=\> @order, :locals =\> { :more\_options =\> more\_options\_hsh } ) ? ---
**Author:** ![mpalluat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ac8455/32.png) [@mpalluat](https://www.ruby-forum.com/u/mpalluat)\ **Post date:** [July 4, 2007, 2:18pm UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515/3 "2007-07-04T14:18:00Z")
Hi Shai, Thanks for your advice. Unfortunately, I get the same error after having renamed my variable. I’ve googled the net and haven’t yet found a solution. anyone ? ---
**Author:** ![mpalluat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ac8455/32.png) [@mpalluat](https://www.ruby-forum.com/u/mpalluat)\ **Post date:** [July 4, 2007, 5:21pm UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515/4 "2007-07-04T17:21:26Z")
CPerry, thank you a thousand times ! I had in a LineItem model file a function : def product self.product end this was causing the recursion ( I don’t know why I had written this function in the first place). Marc ---
**Author:** ![mpalluat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ac8455/32.png) [@mpalluat](https://www.ruby-forum.com/u/mpalluat)\ **Post date:** [July 4, 2007, 2:48pm UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515/5 "2007-07-04T14:48:02Z")
I had this same problem yesterday, and it was because I was calling a variable twice and it was simply looping itself over and over. Renaming the variable worked for me. It was posting to a column in my DB, then trying to post a value to the same column, so it just continuously looped itself. Sorry I can’t be more help! Just check to be sure that you are not calling a variable and then calling it again somewhere else with different values. –Cory ---
**Author:** ![mpalluat](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/m/ac8455/32.png) [@mpalluat](https://www.ruby-forum.com/u/mpalluat)\ **Post date:** [July 4, 2007, 7:27pm UTC](https://www.ruby-forum.com/t/stack-level-too-deep/108515/6 "2007-07-04T19:27:38Z")
Awesome, glad you found the error. –Cory