Ruby China

新手问题 Grape 如何查看 route？

QueXuQ · 2013年09月24日 · 最后由 n5ken 回复于 2019年07月19日 · 5495 次阅读

我根据 grape 的文档配置，在 app 里，加了 api 的文件夹，也在 application.rb 下加了：

config.paths.add "app/api", glob: "**/*.rb"
config.autoload_paths += Dir["#{Rails.root}/app/api/*"]

在 routes 里加了：

mount API::Base => '/'

但是运行rake routes就出现：

rake aborted!
Rails::Application::RoutesReloader#execute_if_updated delegated to updater.execute_if_updated, but updater is nil: #<Rails::Application::RoutesReloader:0x007f8802fbbe68 @paths=["/rfacility/config/routes.rb"], @route_sets=[#<ActionDispatch::Routing::RouteSet:0x007f8801bc23d0>]>
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
/Users/feng/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/rfacility/config/environment.rb:5:in `<top (required)>'
/.rvm/gems/ruby-2.0.0-p247/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
/.rvm/gems/ruby-2.0.0-p247/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `eval'
/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => routes => environment
(See full trace by running task with --trace)

完全找不到问题出在哪里，想着第一次用 grape，没想到就掉进这个坑里，请问有谁知道这事该怎么整吗？

jimrokliu #1 2013年09月24日

先不加 reload api 试试

QueXuQ #2 2013年09月24日

运行：rake routes --trace

** Invoke routes (first_time)
** Invoke environment (first_time)
** Execute environment
rake aborted!
Rails::Application::RoutesReloader#execute_if_updated delegated to updater.execute_if_updated, but updater is nil: #<Rails::Application::RoutesReloader:0x007fede744afc0 @paths=["/rfacility/config/routes.rb"], @route_sets=[#<ActionDispatch::Routing::RouteSet:0x007fede4859240>]>
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:150:in `block in tsort_each'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:183:in `block (2 levels) in each_strongly_connected_component'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:219:in `each_strongly_connected_component_from'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:182:in `block in each_strongly_connected_component'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:180:in `each_strongly_connected_component'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/tsort.rb:148:in `tsort_each'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/rfacility/config/environment.rb:5:in `<top (required)>'
/.rvm/gems/ruby-2.0.0-p247/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
/.rvm/gems/ruby-2.0.0-p247/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:236:in `call'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:236:in `block in execute'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:231:in `each'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:231:in `execute'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:175:in `block in invoke_with_call_chain'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:197:in `block in invoke_prerequisites'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:195:in `each'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:195:in `invoke_prerequisites'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:174:in `block in invoke_with_call_chain'
/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/monitor.rb:211:in `mon_synchronize'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:168:in `invoke_with_call_chain'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/task.rb:161:in `invoke'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:149:in `invoke_task'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:106:in `block (2 levels) in top_level'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:106:in `each'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:106:in `block in top_level'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:115:in `run_with_threads'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:100:in `top_level'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:78:in `block in run'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:165:in `standard_exception_handling'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/lib/rake/application.rb:75:in `run'
/.rvm/gems/ruby-2.0.0-p247/gems/rake-10.1.0/bin/rake:33:in `<top (required)>'
/.rvm/gems/ruby-2.0.0-p247/bin/rake:23:in `load'
/.rvm/gems/ruby-2.0.0-p247/bin/rake:23:in `<main>'
/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `eval'
/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => routes => environment
QueXuQ #3 2013年09月24日

#1 楼 @jimrokliu 是指不加：

config.paths.add "app/api", glob: "**/*.rb"
config.autoload_paths += Dir["#{Rails.root}/app/api/*"]

这个吗？试过了，错误也是一样的。

QueXuQ #4 2013年09月24日

application.rb

require File.expand_path('../boot', __FILE__)

require "active_record/railtie"
require "action_controller/railtie"
require "action_mailer/railtie"
require "sprockets/railtie"

Bundler.require(:default, Rails.env)

module Rfacility
  class Application < Rails::Application
    # config.autoload_paths += %W(#{config.root}/lib)
    # config.paths.add "app/api", glob: "**/*.rb"
    # config.autoload_paths += Dir["#{Rails.root}/app/api/*"]

    config.time_zone = 'Beijing'

    config.i18n.default = "zh-CN"
  end
end

错误一样：

rake aborted!
Rails::Application::RoutesReloader#execute_if_updated delegated to updater.execute_if_updated, but updater is nil: #<Rails::Application::RoutesReloader:0x007fe210e90aa8 @paths=["/rfacility/config/routes.rb"], @route_sets=[#<ActionDispatch::Routing::RouteSet:0x007fe2116a79f8>]>
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:10:in `rescue in execute_if_updated'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/routes_reloader.rb:6:in `execute_if_updated'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application/finisher.rb:69:in `block in <module:Finisher>'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `instance_exec'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:30:in `run'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:55:in `block in run_initializers'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/initializable.rb:54:in `run_initializers'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:215:in `initialize!'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/railtie/configurable.rb:30:in `method_missing'
/rfacility/config/environment.rb:5:in `<top (required)>'
/.rvm/gems/ruby-2.0.0-p247/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require'
/.rvm/gems/ruby-2.0.0-p247/gems/backports-3.3.4/lib/backports/tools.rb:328:in `require_with_backports'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `block in require'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:213:in `load_dependency'
/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-4.0.0/lib/active_support/dependencies.rb:228:in `require'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:189:in `require_environment!'
/.rvm/gems/ruby-2.0.0-p247/gems/railties-4.0.0/lib/rails/application.rb:249:in `block in run_tasks_blocks'
/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `eval'
/.rvm/gems/ruby-2.0.0-p247/bin/ruby_noexec_wrapper:14:in `<main>'
Tasks: TOP => routes => environment
(See full trace by running task with --trace)
jimrokliu #5 2013年09月24日

不是指这个，这个要加上。有没有加这个

if Rails.env.development?

  ActiveSupport::Dependencies.explicitly_unloadable_constants << "Twitter::API"

  api_files = Dir["#{Rails.root}/app/api/**/*.rb"]
  api_reloader = ActiveSupport::FileUpdateChecker.new(api_files) do
    Rails.application.reload_routes!
  end
  ActionDispatch::Callbacks.to_prepare do
    api_reloader.execute_if_updated
  end

end
QueXuQ #6 2013年09月24日

#5 楼 @jimrokliu 没有加这个，刚刚加了试了，还是一样的错误： application.rb

require File.expand_path('../boot', __FILE__)

# Pick the frameworks you want:
require "active_record/railtie"
require "action_controller/railtie"
require "action_mailer/railtie"
require "sprockets/railtie"

Bundler.require(:default, Rails.env)

module RepairFacility
  class Application < Rails::Application
    config.autoload_paths += %W(#{config.root}/lib)
    config.paths.add "app/api", glob: "**/*.rb"
    config.autoload_paths += Dir["#{Rails.root}/app/api/*"]

    config.time_zone = 'Beijing'

    config.i18n.default = "zh-CN"

    if Rails.env.development?
      ActiveSupport::Dependencies.explicitly_unloadable_constants << "API::Base"

      api_files = Dir["#{Rails.root}/app/api/**/*.rb"]
      api_reloader = ActiveSupport::FileUpdateChecker.new(api_files) do
        Rails.application.reload_routes!
      end
      ActionDispatch::Callbacks.to_prepare do
        api_reloader.execute_if_updated
      end

    end
  end
end
QueXuQ #7 2013年09月24日

#5 楼 @jimrokliu 我看 ruby china 的源码也没有加这个啊，实在不明白我这为什么会有这个错误。

jimrokliu #8 2013年09月24日

不太知道了。

QueXuQ #9 2013年09月24日

#8 楼 @jimrokliu 好吧。谢谢。 不用 grape 了，这个坑弄了 1 天都没弄好。怕以后还有坑，还是 controller jbuilder 吧。

jimrokliu #10 2013年09月24日

你找个干净的工程试试，grape 应该还好。开发起来方便不少。

QueXuQ #11 2013年09月24日

#10 楼 @jimrokliu 刚刚试了，还是一样的问题，报一样的错误。

jimrokliu #12 2013年09月24日

那要看看你的版本了，我这本 rails 是 3.2.14 的。ruby 1.9，2.0 都没问题。

QueXuQ #13 2013年09月24日

#12 楼 @jimrokliu 好吧，太坑了。找到问题了。


module API
  class Base < Grape::API
    prefix "api"
    error_format :json  #去掉这个就可以了，但是我不知道原因
    format :json
jimrokliu #14 2013年09月24日

我这里还真么没有加这条

victor #16 2014年06月30日

#15 楼 @QueXuQ 因为你们的 grape 的版本不同。ruby-china 用的是 0.1.5 的版本。参见 https://github.com/intridea/grape/pull/285 ，在 0.2.X 版本之后 error_format 已经删除了。

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