ActionController UnknownFormat Error in rails 4

本文关键字：rails in Error UnknownFormat ActionController 更新时间：2023-09-26

我在rails中有一个问题。

视图(index.html.erb)

<div id="container" style="margin:0 auto;">
  <div style="float:left; height: 300px; width: 300px" align="center">
    <%= form_tag("/java/select", :method => "post", :remote => true) do %>
      Deivce1 <%= radio_button_tag "devices", "1"%><br>
      Deivce2 <%= radio_button_tag "devices", "2"%><br>
      Deivce3 <%= radio_button_tag "devices", "3"%><br>
      <%= submit_tag "On/Off" %>
    <% end %>
  </div>
</div>
<div id="statelist"></div>

控制器(java_controller.rb)

class JavaController < ApplicationController
skip_before_filter :verify_authenticity_token
    def select
      @device = params[:devices]
      respond_to do|format|
         format.js
      end
    end
end

js文件(select.js.erb)

$('#statelist').empty().append('<%= j render 'statelist'%>');

html文件(_statelist.html.erb)
```
Selected device is <%= @device %>
```

根文件(rootes.rb)

root "java#index"
post "java/select" => "java#select"

我想我有所有的组件来操作ajax。此外，我通常提前使用类似的语法。

然而，在这种情况下，当我点击"开/关"按钮时，网页上出现了未知格式的错误信息。

此错误指示"respond_to do |format|"行在控制器。

有什么问题吗?谢谢您的关注。

Started POST "/java/select" for 127.0.0.1 at 2014-08-14 17:48:55 +0900
Processing by JavaController#select as HTML
  Parameters: {"utf8"=>"✓", "devices"=>"2", "commit"=>"On/Off"}
Completed 406 Not Acceptable in 6ms
ActionController::UnknownFormat (ActionController::UnknownFormat):
  app/controllers/java_controller.rb:14:in `select'

  Rendered /usr/lib/jruby/jruby-1.7.13/lib/ruby/gems/shared/gems/actionpack-4.1.4/lib/action_dispatch/middleware/templates/rescues/_source.erb (6.0ms)
  Rendered /usr/lib/jruby/jruby-1.7.13/lib/ruby/gems/shared/gems/actionpack-4.1.4/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (14.0ms)
  Rendered /usr/lib/jruby/jruby-1.7.13/lib/ruby/gems/shared/gems/actionpack-4.1.4/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (19.0ms)
  Rendered /usr/lib/jruby/jruby-1.7.13/lib/ruby/gems/shared/gems/actionpack-4.1.4/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (291.0ms)

直接删除

 respond_to do|format|
     format.js
  end

块。在您的示例中，它将根据rails默认值自动加载select.js部分。我不确定，但也许您需要将路径更改为

/java/select.js

也