ruby on rails - Give a 404 instead of a 500 error for missing templates -

i have rails 3.0 app (working on 3.2 upgrade) , whenever requests template doesn't exist gives 500 error in production. instance mysite.com/blog_posts/532 sends post id 532 html no problem, if reason mysite.com/blog_posts/532.txt requested, app raises 500 actionview::missingtemplate error.

this shouldn't happen, because template shouldn't there in first place. should more 404 error, or perhaps show html template.

how can make app either show 404 error missing-template errors, or show default html template instead of giving 500?

log:

started "/blog_posts/73.txt" 127.0.0.1 @ 2013-05-20 21:22:51 -0400   processing blogpostscontroller#show text   parameters: {"id"=>"73"}   pk , serial sequence (2.0ms)   select attr.attname, seq.relname  pg_class seq,  pg_attribute attr,  pg_depend dep,  pg_namespace name,  pg_constraint cons  seq.oid = dep.objid  , seq.relkind = 's'  , attr.attrelid = dep.refobjid  , attr.attnum = dep.refobjsubid  , attr.attrelid = cons.conrelid  , attr.attnum = cons.conkey[1]  , cons.contype = 'p'  , dep.refobjid = '"blog_posts_blog_tags"'::regclass   pk , custom sequence (1.0ms)   select attr.attname,  case  when split_part(def.adsrc, '''', 2) ~ '.'  substr(split_part(def.adsrc, '''', 2),  strpos(split_part(def.adsrc, '''', 2), '.')+1)  else split_part(def.adsrc, '''', 2)  end  pg_class t  join pg_attribute attr on (t.oid = attrelid)  join pg_attrdef def on (adrelid = attrelid , adnum = attnum)  join pg_constraint cons on (conrelid = adrelid , adnum = conkey[1])  t.oid = '"blog_posts_blog_tags"'::regclass  , cons.contype = 'p'  , def.adsrc ~* 'nextval'   blogpost load (0.0ms)  select "blog_posts".* "blog_posts" "blog_posts"."id" = '73' limit 1   sql (0.0ms)   select a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull  pg_attribute left join pg_attrdef d  on a.attrelid = d.adrelid , a.attnum = d.adnum  a.attrelid = '"blog_posts"'::regclass  , a.attnum > 0 , not a.attisdropped  order a.attnum completed 500 internal server error in 59ms   user load (1.0ms)  select "users".* "users" "users"."id" = 1 limit 1   sql (1.0ms)   select a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull  pg_attribute left join pg_attrdef d  on a.attrelid = d.adrelid , a.attnum = d.adnum  a.attrelid = '"users"'::regclass  , a.attnum > 0 , not a.attisdropped  order a.attnum  actionview::missingtemplate (missing template blog_posts/show {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml], :formats=>[:text], :lo cale=>[:en, :en]} in view paths "c:/rails/myapp/app/views", "c:/ruby/lib/ruby/gems/1.9.1/gems/devise-1.5.4/app/views"):   rendered c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/templates/rescues/missing_template.erb within res cues/layout (1.0ms) 

updated log, trace:

started "/blog_posts/73.txt" 127.0.0.1 @ 2013-05-20 22:14:28 -0400   processing blogpostscontroller#show text   parameters: {"id"=>"73"}   pk , serial sequence (2.0ms)   select attr.attname, seq.relname  pg_class seq,  pg_attribute attr,  pg_depend dep,  pg_namespace name,  pg_constraint cons  seq.oid = dep.objid  , seq.relkind = 's'  , attr.attrelid = dep.refobjid  , attr.attnum = dep.refobjsubid  , attr.attrelid = cons.conrelid  , attr.attnum = cons.conkey[1]  , cons.contype = 'p'  , dep.refobjid = '"blog_posts_blog_tags"'::regclass   pk , custom sequence (1.0ms)   select attr.attname,  case  when split_part(def.adsrc, '''', 2) ~ '.'  substr(split_part(def.adsrc, '''', 2),  strpos(split_part(def.adsrc, '''', 2), '.')+1)  else split_part(def.adsrc, '''', 2)  end  pg_class t  join pg_attribute attr on (t.oid = attrelid)  join pg_attrdef def on (adrelid = attrelid , adnum = attnum)  join pg_constraint cons on (conrelid = adrelid , adnum = conkey[1])  t.oid = '"blog_posts_blog_tags"'::regclass  , cons.contype = 'p'  , def.adsrc ~* 'nextval'   blogpost load (0.0ms)  select "blog_posts".* "blog_posts" "blog_posts"."id" = '73' limit 1   sql (0.0ms)   select a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull  pg_attribute left join pg_attrdef d  on a.attrelid = d.adrelid , a.attnum = d.adnum  a.attrelid = '"blog_posts"'::regclass  , a.attnum > 0 , not a.attisdropped  order a.attnum -------------------------------------------------------------------------------- exception: missing template blog_posts/show {:handlers=>[:erb, :rjs, :builder, :rhtml, :rxml], :formats=>[:text], :locale=>[:en, :en]} in view paths "c:/rails/myapp/app/views", "c:/ruby/lib/ruby/gems/1.9.1/gems/devise-1.5.4/app/views" c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_view/paths.rb:15:in `find' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_view/lookup_context.rb:81:in `find' c:in `find_template' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_view/render/rendering.rb:46:in `_determine_template' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_view/render/rendering.rb:24:in `render' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/rendering.rb:115:in `_render_template' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/rendering.rb:109:in `render_to_body' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/renderers.rb:47:in `render_to_body' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/compatibility.rb:55:in `render_to_body' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/rendering.rb:102:in `render_to_string' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/rendering.rb:93:in `render' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/rendering.rb:17:in `render' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/instrumentation.rb:40:in `block (2 levels) in render' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/core_ext/benchmark.rb:5:in `block in ms' c:/ruby/lib/ruby/1.9.1/benchmark.rb:295:in `realtime' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/core_ext/benchmark.rb:5:in `ms' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/instrumentation.rb:40:in `block in render' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/instrumentation.rb:78:in `cleanup_view_runtime' c:/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.20/lib/active_record/railties/controller_runtime.rb:15:in `cleanup_view_runtime' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/instrumentation.rb:39:in `render' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/implicit_render.rb:10:in `default_render' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/implicit_render.rb:5:in `send_action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/base.rb:150:in `process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/rendering.rb:11:in `process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/callbacks.rb:18:in `block in process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/callbacks.rb:436:in `_run__326851374__process_action__856302785__callbacks' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/callbacks.rb:410:in `_run_process_action_callbacks' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/callbacks.rb:94:in `run_callbacks' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/callbacks.rb:17:in `process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/rescue.rb:17:in `process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/notifications.rb:52:in `block in instrument' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/notifications/instrumenter.rb:21:in `instrument' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/notifications.rb:52:in `instrument' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/instrumentation.rb:29:in `process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/newrelic_rpm-3.6.2.96/lib/new_relic/agent/instrumentation/rails3/action_controller.rb:38:in `block in process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/newrelic_rpm-3.6.2.96/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:318:in `perform_action_with_newrelic_trace' c:/ruby/lib/ruby/gems/1.9.1/gems/newrelic_rpm-3.6.2.96/lib/new_relic/agent/instrumentation/rails3/action_controller.rb:37:in `process_action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/base.rb:119:in `process' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/abstract_controller/rendering.rb:41:in `process' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal.rb:138:in `dispatch' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_controller/metal.rb:178:in `block in action' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/routing/route_set.rb:68:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/routing/route_set.rb:68:in `dispatch' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/routing/route_set.rb:33:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-mount-0.6.14/lib/rack/mount/route_set.rb:148:in `block in call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-mount-0.6.14/lib/rack/mount/code_generation.rb:93:in `block in recognize' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-mount-0.6.14/lib/rack/mount/code_generation.rb:89:in `optimized_each' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-mount-0.6.14/lib/rack/mount/code_generation.rb:92:in `recognize' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-mount-0.6.14/lib/rack/mount/route_set.rb:139:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/routing/route_set.rb:499:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/newrelic_rpm-3.6.2.96/lib/new_relic/rack/error_collector.rb:12:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/newrelic_rpm-3.6.2.96/lib/new_relic/rack/agent_hooks.rb:18:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/newrelic_rpm-3.6.2.96/lib/new_relic/rack/developer_mode.rb:28:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/warden-1.2.1/lib/warden/manager.rb:35:in `block in call' c:/ruby/lib/ruby/gems/1.9.1/gems/warden-1.2.1/lib/warden/manager.rb:34:in `catch' c:/ruby/lib/ruby/gems/1.9.1/gems/warden-1.2.1/lib/warden/manager.rb:34:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/head.rb:14:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/methodoverride.rb:24:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/params_parser.rb:21:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/flash.rb:182:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/session/abstract_store.rb:149:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/cookies.rb:302:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.20/lib/active_record/query_cache.rb:32:in `block in call' c:/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.20/lib/active_record/connection_adapters/abstract/query_cache.rb:28:in `cache' c:/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.20/lib/active_record/query_cache.rb:12:in `cache' c:/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.20/lib/active_record/query_cache.rb:31:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/activerecord-3.0.20/lib/active_record/connection_adapters/abstract/connection_pool.rb:354:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/callbacks.rb:46:in `block in call' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/callbacks.rb:416:in `_run_call_callbacks' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/callbacks.rb:44:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/sendfile.rb:106:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/remote_ip.rb:48:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/show_exceptions.rb:47:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.20/lib/rails/rack/logger.rb:13:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/runtime.rb:17:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/activesupport-3.0.20/lib/active_support/cache/strategy/local_cache.rb:72:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/lock.rb:13:in `block in call' <internal:prelude>:10:in `synchronize' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/lock.rb:13:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/actionpack-3.0.20/lib/action_dispatch/middleware/static.rb:30:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/airbrake-3.1.4/lib/airbrake/rack.rb:41:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/airbrake-3.1.4/lib/airbrake/user_informer.rb:12:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.20/lib/rails/application.rb:168:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.20/lib/rails/application.rb:77:in `method_missing' c:/ruby/lib/ruby/gems/1.9.1/gems/railties-3.0.20/lib/rails/rack/log_tailer.rb:14:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/content_length.rb:13:in `call' c:/ruby/lib/ruby/gems/1.9.1/gems/rack-1.2.7/lib/rack/handler/webrick.rb:52:in `service' c:/ruby/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service' c:/ruby/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run' c:/ruby/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread' -------------------------------------------------------------------------------- completed 200 ok in 59ms [2013-05-20 22:14:28] warn  not determine content-length of response body. set content-length of response or set response#chunked = true 

in applicationcontroller can should able rescue missing template, , re raise 404 .

class applicationcontroller > actioncontroller::base   rescue_from actionview::missingtemplate |exception|      raise actioncontroller::routingerror.new('not found')   end end