Rails form_for删除

Question

我已经构建了Rails 5 RESTful API，并且正在开发用于测试界面的消费者应用程序。 CRUD的CR效果很好，但我坚持使用Delete。 这两个应用程序都在本地运行。

我想致电：从我的外部消费者应用程序中DELETE /users/:user_id/attendees/:id(.:format) attendees#destroy 。 理想情况下，这将由常规的Rails视图助手直接调用API来完成，并且不需要自定义JavaScript或将API（或其资源）包装在消费者应用中。

我有它在JavaScript中工作：

$("#button").click(function(){
  resource_id = $("#button").data('resource-id');
  $.ajax({
    type: "DELETE",
    url: "http://localhost:3001/users/1/attendees/" + resource_id + "?user_email=EMAIL&user_token=TOKEN&",
    dataType: "json",
    data: {"_method":"delete"},
    complete: function(){
      alert("Deleted successfully");
  }
  });
});

我想要的是这样的：
= link_to "Delete", "http://localhost:3001/users/1/attendees/THE_RESOURCE_ID?user_email=EMAIL&user_token=TOKEN&", method: :delete
呈现此HTML：
<a rel="nofollow" data-method="delete" href="http://localhost:3001/users/1/attendees/THE_RESOURCE_ID?user_email=EMAIL&amp;user_token=TOKEN&amp;">Delete</a>

哪个不起作用：

{
  "status":404,
  "error":"Not Found",
  "exception":"#\u003cActionController::RoutingError: No route matches [POST] \"/users/1/attendees/2\"\u003e",
  "traces":{
    "Application Trace":[],
    "Framework Trace":
      [{"id":0,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb:53:in `call'"},
      {"id":1,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'"},
      {"id":2,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/rack/logger.rb:36:in `call_app'"},
      {"id":3,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/rack/logger.rb:24:in `block in call'"},
      {"id":4,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/tagged_logging.rb:70:in `block in tagged'"},
      {"id":5,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/tagged_logging.rb:26:in `tagged'"},
      {"id":6,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/tagged_logging.rb:70:in `tagged'"},
      {"id":7,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/rack/logger.rb:24:in `call'"},
      {"id":8,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/request_id.rb:24:in `call'"},
      {"id":9,"trace":"rack (2.0.0.alpha) lib/rack/runtime.rb:22:in `call'"},
      {"id":10,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'"},
      {"id":11,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/executor.rb:12:in `call'"},
      {"id":12,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/static.rb:136:in `call'"},
      {"id":13,"trace":"rack (2.0.0.alpha) lib/rack/sendfile.rb:111:in `call'"},
      {"id":14,"trace":"rack-cors (0.4.0) lib/rack/cors.rb:80:in `call'"},
      {"id":15,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/engine.rb:522:in `call'"},
      {"id":16,"trace":"puma (3.2.0) lib/puma/configuration.rb:227:in `call'"},
      {"id":17,"trace":"puma (3.2.0) lib/puma/server.rb:561:in `handle_request'"},
      {"id":18,"trace":"puma (3.2.0) lib/puma/server.rb:406:in `process_client'"},
      {"id":19,"trace":"puma (3.2.0) lib/puma/server.rb:271:in `block in run'"},
      {"id":20,"trace":"puma (3.2.0) lib/puma/thread_pool.rb:111:in `call'"},
      {"id":21,"trace":"puma (3.2.0) lib/puma/thread_pool.rb:111:in `block in spawn_thread'"}],
    "Full Trace":[{"id":0,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/debug_exceptions.rb:53:in `call'"},
      {"id":1,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/show_exceptions.rb:31:in `call'"},
      {"id":2,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/rack/logger.rb:36:in `call_app'"},
      {"id":3,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/rack/logger.rb:24:in `block in call'"},
      {"id":4,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/tagged_logging.rb:70:in `block in tagged'"},
      {"id":5,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/tagged_logging.rb:26:in `tagged'"},
      {"id":6,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/tagged_logging.rb:70:in `tagged'"},
      {"id":7,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/rack/logger.rb:24:in `call'"},
      {"id":8,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/request_id.rb:24:in `call'"},
      {"id":9,"trace":"rack (2.0.0.alpha) lib/rack/runtime.rb:22:in `call'"},
      {"id":10,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/activesupport/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'"},
      {"id":11,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/executor.rb:12:in `call'"},
      {"id":12,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/actionpack/lib/action_dispatch/middleware/static.rb:136:in `call'"},
      {"id":13,"trace":"rack (2.0.0.alpha) lib/rack/sendfile.rb:111:in `call'"},
      {"id":14,"trace":"rack-cors (0.4.0) lib/rack/cors.rb:80:in `call'"},
      {"id":15,"trace":"/Users/MYUSER/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/bundler/gems/rails-7b82e1c77b48/railties/lib/rails/engine.rb:522:in `call'"},
      {"id":16,"trace":"puma (3.2.0) lib/puma/configuration.rb:227:in `call'"},
      {"id":17,"trace":"puma (3.2.0) lib/puma/server.rb:561:in `handle_request'"},
      {"id":18,"trace":"puma (3.2.0) lib/puma/server.rb:406:in `process_client'"},
      {"id":19,"trace":"puma (3.2.0) lib/puma/server.rb:271:in `block in run'"},
      {"id":20,"trace":"puma (3.2.0) lib/puma/thread_pool.rb:111:in `call'"},
      {"id":21,"trace":"puma (3.2.0) lib/puma/thread_pool.rb:111:in `block in spawn_thread'"}]}}

我已经安装好了可rack-cors宝石。

（我知道还有其他重构可以做，但是我认为这些是我知道如何解决的问题。:-)）

谢谢你的帮助！

以下是该API的相关现有路线：

  user_attendees GET    /users/:user_id/attendees(.:format)     attendees#index
                 POST   /users/:user_id/attendees(.:format)     attendees#create
   user_attendee GET    /users/:user_id/attendees/:id(.:format) attendees#show
                 PATCH  /users/:user_id/attendees/:id(.:format) attendees#update
                 PUT    /users/:user_id/attendees/:id(.:format) attendees#update
                 DELETE /users/:user_id/attendees/:id(.:format) attendees#destroy

Answer 1

叹...

我缺少远程：true 。

= link_to "Delete", "http://localhost:3001/users/1/attendees/THE_RESOURCE_ID?user_email=EMAIL&user_token=TOKEN&", method: :delete, remote: true

对于有兴趣的人，这是我启用CORS的方式： http : //sourcey.com/building-the-prefect-rails-5-api-only-app/#enabling-cors 。 这是提醒我使用remote: true的SO帖子remote: true ： 使用Ajax进行远程调用并呈现生成的JSON对象的Rails 3 + UJS的简单示例 。