我有一个Rails 3.0应用程序（正在进行3.2升级），每当有人请求一个不存在的模板时，它会在生产中产生500错误。例如，mysite.com/blog_posts/532将ID为532的帖子作为HTML发送回来没有问题，但如果由于某种原因请求了mysite.com/blog_posts/532.txt，该应用程序会引发500个ActionView :: MissingTemplate错误。 / p>
这不应该发生，因为模板首先不应该存在。它应该更恰当地是404错误，或者只是显示HTML模板。
如何让应用为所有丢失的模板错误显示404错误，或者显示默认的HTML模板而不是给出500？
日志：
Started GET "/blog_posts/73.txt" for 127.0.0.1 at 2013-05-20 21:22:51 -0400
Processing by BlogPostsController#show as TEXT
Parameters: {"id"=>"73"}
PK and serial sequence (2.0ms) SELECT attr.attname, seq.relname
FROM pg_class seq,
pg_attribute attr,
pg_depend dep,
pg_namespace name,
pg_constraint cons
WHERE seq.oid = dep.objid
AND seq.relkind = 'S'
AND attr.attrelid = dep.refobjid
AND attr.attnum = dep.refobjsubid
AND attr.attrelid = cons.conrelid
AND attr.attnum = cons.conkey[1]
AND cons.contype = 'p'
AND dep.refobjid = '"blog_posts_blog_tags"'::regclass
PK and custom sequence (1.0ms) SELECT attr.attname,
CASE
WHEN split_part(def.adsrc, '''', 2) ~ '.' THEN
substr(split_part(def.adsrc, '''', 2),
strpos(split_part(def.adsrc, '''', 2), '.')+1)
ELSE split_part(def.adsrc, '''', 2)
END
FROM pg_class t
JOIN pg_attribute attr ON (t.oid = attrelid)
JOIN pg_attrdef def ON (adrelid = attrelid AND adnum = attnum)
JOIN pg_constraint cons ON (conrelid = adrelid AND adnum = conkey[1])
WHERE t.oid = '"blog_posts_blog_tags"'::regclass
AND cons.contype = 'p'
AND def.adsrc ~* 'nextval'
BlogPost Load (0.0ms) SELECT "blog_posts".* FROM "blog_posts" WHERE "blog_posts"."id" = '73' LIMIT 1
SQL (0.0ms) SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
FROM pg_attribute a LEFT JOIN pg_attrdef d
ON a.attrelid = d.adrelid AND a.attnum = d.adnum
WHERE a.attrelid = '"blog_posts"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
Completed 500 Internal Server Error in 59ms
User Load (1.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = 1 LIMIT 1
SQL (1.0ms) SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
FROM pg_attribute a LEFT JOIN pg_attrdef d
ON a.attrelid = d.adrelid AND a.attnum = d.adnum
WHERE a.attrelid = '"users"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
ActionView::MissingTemplate (Missing template blog_posts/show with {: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)
更新了日志，带有跟踪：
Started GET "/blog_posts/73.txt" for 127.0.0.1 at 2013-05-20 22:14:28 -0400
Processing by BlogPostsController#show as TEXT
Parameters: {"id"=>"73"}
PK and serial sequence (2.0ms) SELECT attr.attname, seq.relname
FROM pg_class seq,
pg_attribute attr,
pg_depend dep,
pg_namespace name,
pg_constraint cons
WHERE seq.oid = dep.objid
AND seq.relkind = 'S'
AND attr.attrelid = dep.refobjid
AND attr.attnum = dep.refobjsubid
AND attr.attrelid = cons.conrelid
AND attr.attnum = cons.conkey[1]
AND cons.contype = 'p'
AND dep.refobjid = '"blog_posts_blog_tags"'::regclass
PK and custom sequence (1.0ms) SELECT attr.attname,
CASE
WHEN split_part(def.adsrc, '''', 2) ~ '.' THEN
substr(split_part(def.adsrc, '''', 2),
strpos(split_part(def.adsrc, '''', 2), '.')+1)
ELSE split_part(def.adsrc, '''', 2)
END
FROM pg_class t
JOIN pg_attribute attr ON (t.oid = attrelid)
JOIN pg_attrdef def ON (adrelid = attrelid AND adnum = attnum)
JOIN pg_constraint cons ON (conrelid = adrelid AND adnum = conkey[1])
WHERE t.oid = '"blog_posts_blog_tags"'::regclass
AND cons.contype = 'p'
AND def.adsrc ~* 'nextval'
BlogPost Load (0.0ms) SELECT "blog_posts".* FROM "blog_posts" WHERE "blog_posts"."id" = '73' LIMIT 1
SQL (0.0ms) SELECT a.attname, format_type(a.atttypid, a.atttypmod), d.adsrc, a.attnotnull
FROM pg_attribute a LEFT JOIN pg_attrdef d
ON a.attrelid = d.adrelid AND a.attnum = d.adnum
WHERE a.attrelid = '"blog_posts"'::regclass
AND a.attnum > 0 AND NOT a.attisdropped
ORDER BY a.attnum
--------------------------------------------------------------------------------
exception: Missing template blog_posts/show with {: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 Could not determine content-length of response body. Set content-length of the response or set Response#chunked
= true
答案 0 :(得分：7)
在你的applicationController中你可以从丢失的模板中解救出来，然后重新引发404。
class ApplicationController > ActionController::Base
rescue_from ActionView::MissingTemplate do |exception|
raise ActionController::RoutingError.new('Not Found')
end
end