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为缺少模板提供 404 而不是 500 错误

本文介绍了为缺少模板提供 404 而不是 500 错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有一个 Rails 3.0 应用程序(正在升级 3.2)，每当有人请求一个不存在的模板时，它都会在生产中给出 500 错误.例如，mysite.com/blog_posts/532 将 ID 为 532 的帖子作为 HTML 发回没有问题，但如果出于某种原因请求 mysite.com/blog_posts/532.txt，应用程序会引发 500 ActionView::MissingTemplate 错误.

I have a Rails 3.0 app (working on a 3.2 upgrade) and whenever someone requests a template that doesn't exist it gives a 500 error in production. For instance mysite.com/blog_posts/532 sends the post with ID 532 back as HTML no problem, but if for some reason mysite.com/blog_posts/532.txt is requested, the app raises a 500 ActionView::MissingTemplate error.

这不应该发生，因为模板一开始就不应该存在.它应该更恰当地是 404 错误，或者可能只是显示 HTML 模板.

This shouldn't happen, because the template shouldn't be there in the first place. It should more properly be a 404 error, or perhaps just show the HTML template.

如何让应用程序为所有缺失模板错误显示 404 错误，或显示默认 HTML 模板而不是 500?

How can I make the app either show a 404 error for all missing-template errors, or show the default HTML template instead of giving a 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)

更新日志，带跟踪:

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

推荐答案

在您的 applicationController 中，您应该能够从丢失的模板中拯救出来，然后重新引发 404 .

in your applicationController you can should be able to rescue from the missing template, and then re raise a 404 .

class ApplicationController > ActionController::Base
  rescue_from ActionView::MissingTemplate do |exception|
     raise ActionController::RoutingError.new('Not Found')
  end
end

这篇关于为缺少模板提供 404 而不是 500 错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

08-24 07:40
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