NoMethodError (undefined method `to_sym' for {"6"=>"1"}:Hash

I’ve got a search form that was working on rails 1.2.6, but since
upgrading to 2.0.2, I’m getting this error when I post my form. Here’s
the full error:

Processing SearchController#results (for 24.173.26.226 at 2008-01-24
14:51:23) [GET]
Session ID:
BAh7CDoTc2hvd1RodW1ibmFpbHMiBjE6CXVzZXJvOglVc2VyBzoWQGF0dHJp%0AYnV0ZXNfY2FjaGV7ADoQQGF0dHJpYnV0ZXN7DCIJbmFtZSITRG91ZyBKb2hu%0Ac3RvbmUiDWNhdGVnb3J5Ig5zdXBlcnVzZXIiB2lkIgYyIg1wYXNzd29yZCIN%0AcEBzc3dvcmQiCmVtYWlsIiNkam9obnN0b25lQHByb3ZpbmNldG93bi1tYS5n%0Ab3YiC2FjdGl2ZSIGMSIPY3JlYXRlZF9hdCIYMjAwOC0wMS0yMyAxMzozNToz%0AOCIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNoSGFz%0AaHsABjoKQHVzZWR7AA%3D%3D–ec73422aae883d2a819f7c304ecc59ed347e3337
Parameters: {“format”=>{“6”=>“1”}, “collection”=>{“5”=>“1”},
“search”=>{“form”=>“advancedsearch”, “keyword”=>“oil”}, “x”=>“17”,
“y”=>“13”, “action”=>“results”, “controller”=>“search”}

NoMethodError (undefined method to_sym' for {"6"=>"1"}:HashWithIndifferentAccess): /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:420:intemplate_format’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_view/base.rb:396:in
pick_template_extension' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1259:intemplate_exempt_from_layout?’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/layout.rb:278:in
apply_layout?' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/layout.rb:256:inrender_without_benchmark’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:51:in
render' /usr/lib/ruby/1.8/benchmark.rb:293:inmeasure’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:51:in
render' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1153:indefault_render’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:1159:in
perform_action_without_filters' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:697:incall_filters’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:689:in
perform_action_without_benchmark' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:inperform_action_without_rescue’
/usr/lib/ruby/1.8/benchmark.rb:293:in measure' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/benchmarking.rb:68:inperform_action_without_rescue’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/rescue.rb:199:in
perform_action_without_caching' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:678:inperform_action’
/usr/lib64/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/connection_adapters/abstract/query_cache.rb:33:in
cache' /usr/lib64/ruby/gems/1.8/gems/activerecord-2.0.2/lib/active_record/query_cache.rb:8:incache’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/caching.rb:677:in
perform_action' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:insend’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:524:in
process_without_filters' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/filters.rb:685:inprocess_without_session_management_support’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/session_management.rb:123:in
process' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/base.rb:388:inprocess’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:171:in
handle_request' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:115:indispatch’
/usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:126:in
dispatch_cgi' /usr/lib64/ruby/gems/1.8/gems/actionpack-2.0.2/lib/action_controller/dispatcher.rb:9:indispatch’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel/rails.rb:76:in
process' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel/rails.rb:74:insynchronize’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel/rails.rb:74:in
process' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel.rb:159:inprocess_client’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel.rb:158:in
each' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel.rb:158:inprocess_client’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel.rb:285:in
run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel.rb:285:ininitialize’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel.rb:285:in
new' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel.rb:285:inrun’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel.rb:268:in
initialize' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel.rb:268:innew’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel.rb:268:in
run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel/configurator.rb:282:inrun’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/…/lib/mongrel/configurator.rb:281:in
each' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel/configurator.rb:281:inrun’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/mongrel_rails:128:in
run' /usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/../lib/mongrel/command.rb:212:inrun’
/usr/lib64/ruby/gems/1.8/gems/mongrel-1.1.3/bin/mongrel_rails:281
/usr/bin/mongrel_rails:19:in `load’
/usr/bin/mongrel_rails:19

Michael Coker wrote:

Parameters: {“format”=>{“6”=>“1”}, “collection”=>{“5”=>“1”},
“search”=>{“form”=>“advancedsearch”, “keyword”=>“oil”}, “x”=>“17”,
“y”=>“13”, “action”=>“results”, “controller”=>“search”}

Change the name of that parameter and it will work.