Ruby on rails - 更新 ajax 的 PUT 方法

Posted 2023-03-31

【中文标题】Ruby on rails - 更新 ajax 的 PUT 方法

【英文标题】：Ruby on rails - PUT method on update ajax

【发布时间】：2012-08-03 14:01:57

【问题描述】：

谁能告诉我为什么这个 PUT 方法不起作用。

$.ajax(
        type: "PUT",
        dataType: "script",
        url: '/resources/35',
        data:
        
            resource :  pos_y: 45, pos_x: 50 
        
    ).done(function( msg )
            
                alert( "Data Saved: " + msg );
            );

服务器说我使用了 GET 方法，但在我的 ajax 请求中我有 type: "PUT"

Started GET "/resources/35?resource%5Bpos_y%5D=45&resource%5Bpos_x%5D=50&_=1344001820350" for 192.168.1.89 at 2012-08-03 15:50:20 +0200
Processing by ResourcesController#show as */*
  Parameters: "resource"=>"pos_y"=>"45", "pos_x"=>"50", "_"=>"1344001820350", "id"=>"35"
  User Load (0.3ms)  SELECT "users".* FROM "users" 
  Resource Load (0.1ms)  SELECT "resources".* FROM "resources" WHERE "resources"."id" = ? LIMIT 1  [["id", "35"]]
  Rendered resources/show.html.erb within layouts/login (2.3ms)
Completed 200 OK in 238ms (Views: 235.9ms | ActiveRecord: 0.4ms)

resources_controller.rb

 # PUT /resources/1                                                                                                                                                             
  # PUT /resources/1.json                                                                                                                                                        
  def update
    @resource = Resource.find(params[:id])

    respond_to do |format|
      if @resource.update_attributes(params[:resource])
        format.html  redirect_to @resource, notice: 'successfully updated.' 
        format.js
      else
        format.html  render action: "edit" 
        format.js
      end
    end
  end

我试过添加 _method: 'put' 但还是一样

$.ajax(
        type: "PUT",
        dataType: "script",
        url: '/resources/35',
        data:
        
            resource :  pos_y: 45, pos_x: 50 ,
            _method: 'put'
        
    ).done(function( msg )
            
                alert( "Data Saved: " + msg );
            );

服务器：

"resource%5Bpos_y%5D=45&resource%5Bpos_x%5D=50&method=put&=1344004390840"

Started GET "/resources/35?resource%5Bpos_y%5D=45&resource%5Bpos_x%5D=50&_method=put&_=1344004390840" for 192.168.1.89 at 2012-08-03 16:33:10 +0200
Processing by ResourcesController#show as */*
  Parameters: "resource"=>"pos_y"=>"45", "pos_x"=>"50", "_"=>"1344004390840", "id"=>"35"
  User Load (0.3ms)  SELECT "users".* FROM "users" 
  Resource Load (0.1ms)  SELECT "resources".* FROM "resources" WHERE "resources"."id" = ? LIMIT 1  [["id", "35"]]
  Rendered resources/show.html.erb within layouts/login (0.8ms)
Completed 200 OK in 93ms (Views: 90.5ms | ActiveRecord: 0.4ms)

我将不胜感激。

【问题讨论】：

您的意思是 POST，而不是 PUT？ ....

我更新了我的答案。你可以试试:-)

【参考方案1】：

Rails 通过值为 'put' 的参数 _method 确定 put 请求。

由于并非所有浏览器都支持 put 方法，rails 在 form_tag 中作弊。它将这个输出放在一个 PUT 形式中：

<input type='hidden' name='_method' value='put'>

所以你要做的是：

$.ajax(
    type: "POST",
    dataType: "script",
    url: '/resources/35',
    contentType: 'application/json',
    data: JSON.stringify( resource:pos_y:45,pos_x:50, _method:'put' )
).done(function( msg )
        
            alert( "Data Saved: " + msg );
        );

【讨论】：

嘿，效果很好。你能解释一下为什么我们将哈希转换为 JSON 字符串吗？ JSON.stringify