link_to ...远程：真，方法：第一次尝试发布总是失败答案

【问题标题】：link_to ... remote: true, method: post always fails on first trylink_to ...远程：真，方法：第一次尝试发布总是失败
【发布时间】：2014-09-07 08:13:42
【问题描述】：

我有一个 link_to 使用 remote: true 通过 POST 在特定功能上切换它的点击状态。但是，每次我尝试切换它时，rails 仅在第一次尝试时以 404 响应，但在第二次尝试时正常工作。路由工作正常且配置正确，但不知道为什么第一次点击总是返回 404。这发生在 Chrome 和 Firefox 上，仅限生产，开发工作正常。

我在 Ubuntu 上使用 Rails 4.1 和 Ruby 2.1.1p76，Unicorn + Nginx

这是日志消息：

 I, [2014-09-07T07:51:27.251225 #18157]  INFO -- : Started POST "/u/alexandre/recommend/gigantes-de-aco-e-pontas-soltas" for 101.138.232.14 at 2014-09-07 07:51:27 +0000
F, [2014-09-07T07:51:27.254116 #18157] FATAL -- : 
ActionController::RoutingError (No route matches [POST] "/u/alexandre/recommend/gigantes-de-aco-e-pontas-soltas"):
  actionpack (4.1.0) lib/action_dispatch/middleware/debug_exceptions.rb:21:in `call'
  actionpack (4.1.0) lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
  railties (4.1.0) lib/rails/rack/logger.rb:38:in `call_app'
  railties (4.1.0) lib/rails/rack/logger.rb:20:in `block in call'
  activesupport (4.1.0) lib/active_support/tagged_logging.rb:68:in `block in tagged'
  activesupport (4.1.0) lib/active_support/tagged_logging.rb:26:in `tagged'
  activesupport (4.1.0) lib/active_support/tagged_logging.rb:68:in `tagged'
  railties (4.1.0) lib/rails/rack/logger.rb:20:in `call'
  actionpack (4.1.0) lib/action_dispatch/middleware/request_id.rb:21:in `call'
  rack (1.5.2) lib/rack/methodoverride.rb:21:in `call'
  rack (1.5.2) lib/rack/runtime.rb:17:in `call'
  activesupport (4.1.0) lib/active_support/cache/strategy/local_cache_middleware.rb:26:in `call'
  rack (1.5.2) lib/rack/sendfile.rb:112:in `call'
  railties (4.1.0) lib/rails/engine.rb:514:in `call'
  railties (4.1.0) lib/rails/application.rb:144:in `call'
  unicorn (4.8.3) lib/unicorn/http_server.rb:576:in `process_client'
  unicorn (4.8.3) lib/unicorn/http_server.rb:670:in `worker_loop'
  unicorn (4.8.3) lib/unicorn/http_server.rb:525:in `spawn_missing_workers'
  unicorn (4.8.3) lib/unicorn/http_server.rb:536:in `maintain_worker_count'
  unicorn (4.8.3) lib/unicorn/http_server.rb:294:in `join'
  unicorn (4.8.3) bin/unicorn_rails:209:in `<top (required)>'
  /usr/local/rvm/gems/ruby-2.1.1/bin/unicorn_rails:23:in `load'
  /usr/local/rvm/gems/ruby-2.1.1/bin/unicorn_rails:23:in `<main>'
  /usr/local/rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `eval'
  /usr/local/rvm/gems/ruby-2.1.1/bin/ruby_executable_hooks:15:in `<main>'


I, [2014-09-07T07:51:31.251047 #6505]  INFO -- : Started POST "/u/alexandre/recommend/gigantes-de-aco-e-pontas-soltas" for 101.138.232.14 at 2014-09-07 07:51:31 +0000
I, [2014-09-07T07:51:31.254408 #6505]  INFO -- : Processing by UsersController#recommend as JS"/u/alexandre/recommend/gigantes-de-aco-e-pontas-soltas" for 101.138.232.14 at 2014-09-07 07:51:31 +0000

routes.rb

resources :users, :param => :id, constraints: {id: /.*/}, only: [:new, :create, :edit, :update], path: "u" do
    post "/recommend/:text_id/" => "users#recommend", as: "recommend"
end

_bookshelf_actions.html.haml

%ul#bookshelf-actions
  %li#recommend.is-action.text-center
    %span#recommendation-count.count= text.recommendations_count
    = link_to '', recommend_url , remote: true, method: :post, id: "recommend-btn", class: 'reader-social-icon social-action is-recommend', data: {recommended: recommended}
    %span#recommendation-status.action-name= t(:recommend, count: @current_user ? (@current_user.recommended?(text) ? 1 : 0) : 0)

text.js.coffee

@text.actions.recommend.on 'ajax:success', (e, data) ->
    self.text.actions.recommend.attr 'data-recommended', data.recommended
    $('#recommendation-status').text data.status
    $('#recommendation-count').text data.counter
    return

users_controller.rb

def recommend
    text = Text.friendly.find(params[:text_id])
    @user.recommend(text)
    respond_to do |format|
      status = I18n.t(:recommend, count: @user.recommended?(text) ? 1 : 0)
      text.reload
      counter = text.recommendations_count
      format.json {render json: {status: status, recommended: @user.recommended?(text), counter: counter}, status: :ok}
    end
  end

我用谷歌搜索了一下，没有发现任何关于这个问题或类似问题的信息。任何帮助将不胜感激！谢谢

【问题讨论】：

您在浏览器控制台中看到任何错误吗？同样在您的日志中，您会收到错误 ActionController::RoutingError
您自己设置了服务器吗？你正在使用 Unicorn - 你有任何日志吗？
可能您的路线有问题。在资源中尝试member do post "/recommend/:text_id/" => "users#recommend", as: "recommend" end
浏览器控制台显示 404 未找到。是的，我自己设置了服务器，日志没问题
@KienThanh 的建议奏效了。你对此有什么解释吗？（另外，你能把它变成一个答案，所以我可以把它标记为接受吗？；）

标签： ruby-on-rails ruby-on-rails-4 ruby-on-rails-4.1

【解决方案1】：

您的路线有问题，我没有找到在资源中放置没有member 或collection 的路线的文档。使用您的配置路由，链接可能匹配：

u/recommend/:text_id

所以你应该使用：

member do 
  post "/recommend/:text_id/" => "users#recommend", as: "recommend" 
end

在您的资源路线中。

我认为它有错误，因为路由错过了用户资源的 id。使用 member do ... end 将匹配您的预期路线：

/u/:id/recommend/:text_id

【讨论】：