javascript - ajax放置请求不接受参数中的id

我有一个点击事件，触发了Rails应用程序中记录的更新。服务器错误是会议无法识别字符串，因此我将ID转换为int。然后我遇到了一个路障。我尝试了2种不同的方法，下面两个服务器错误

$('.cancelMeeting').click(function(e)    {
 e.preventDefault();

 console.log(this.href);
 var fullUrl = this.href;
 var hrefLength = (this.href).length;
 var idString = fullUrl.substring(hrefLength-2);
 var id = parseInt(idString);
 console.log(typeof id);
 var source = $(".cancelMeetingPrompt").html();
 var compiled = Handlebars.compile(source);
 $('.meetingHolder').append(compiled());

 $('.confirmCancelMeeting').click(function(e)    {
    e.preventDefault();
    var cancelNotes = $('.cancelNotes').val();
    $.get('/set_user', function(result) {
            var userId = result.id
            console.log(userId);
            console.log(id);

            $.ajax  ({
                type: "PUT",
                url: '/meetings/'+id,
                data: {
                    meeting: id,   **only in second error log below**
                    cancel_user_id: userId,
                    status: 'Cancelled',
                    notes: cancelNotes
                },
                datatype: 'json',
                success: function(result)   {
                    console.log(result);
                },
                error: function(result) {
                    console.log(typeof id);
                    console.log(result);
                }
            });
     })
});



});

当我控制台登录typeof id时，它说的是数字。但是当我运行它时，给出了以下错误。

Started PUT "/meetings/76" for 127.0.0.1 at 2016-10-06 19:38:00 -0400
Processing by MeetingsController#update as */*
  Parameters: {"cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"khkj", "id"=>"76"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 1]]
  Meeting Load (0.2ms)  SELECT  "meetings".* FROM "meetings" WHERE "meetings"."id" = ? LIMIT 1  [["id", 76]]
Completed 400 Bad Request in 6ms (ActiveRecord: 0.5ms)

ActionController::ParameterMissing (param is missing or the value is empty: meeting):
  app/controllers/meetings_controller.rb:95:in `meeting_params'
  app/controllers/meetings_controller.rb:61:in `block in update'
  app/controllers/meetings_controller.rb:60:in `update'

在我上面粘贴的ajax调用中，它确实声明了Meeting：id，以尝试纠正该错误，并且收到此错误

Started PUT "/meetings/76" for 127.0.0.1 at 2016-10-06 19:41:24 -0400
Processing by MeetingsController#update as */*
  Parameters: {"meeting"=>"76", "cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"kjl", "id"=>"76"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 1]]
  Meeting Load (0.1ms)  SELECT  "meetings".* FROM "meetings" WHERE "meetings"."id" = ? LIMIT 1  [["id", 76]]
Completed 500 Internal Server Error in 8ms (ActiveRecord: 0.4ms)

NoMethodError (undefined method `permit' for "76":String):
  app/controllers/meetings_controller.rb:95:in `meeting_params'
  app/controllers/meetings_controller.rb:61:in `block in update'
  app/controllers/meetings_controller.rb:60:in `update'

为什么这不起作用？特别是考虑到我正在使用url直接将其发送到控制器，那么它不应该只是拉取随url传递的id吗？

任何有关为什么这不起作用的线索表示赞赏。谢谢！

*******更新*******

由于以下答案，我能够正确传递参数，但是又出现了另一个错误。

Started PUT "/meetings/84" for 127.0.0.1 at 2016-10-06 21:32:46 -0400
Processing by MeetingsController#update as */*
  Parameters: {"meeting"=>{"cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"gsdf"}, "id"=>"84"}
  User Load (0.3ms)  SELECT  "users".* FROM "users" WHERE "users"."id" = ?  ORDER BY "users"."id" ASC LIMIT 1  [["id", 1]]
  Meeting Load (0.2ms)  SELECT  "meetings".* FROM "meetings" WHERE "meetings"."id" = ? LIMIT 1  [["id", 84]]
   (0.1ms)  begin transaction
  SQL (0.6ms)  UPDATE "meetings" SET "notes" = ?, "updated_at" = ? WHERE "meetings"."id" = ?  [["notes", "gsdf"], ["updated_at", "2016-10-07 01:32:46.982349"], ["id", 84]]
   (1.5ms)  commit transaction
Redirected to http://localhost:3000/profile/home
Completed 302 Found in 14ms (ActiveRecord: 2.7ms)


Started PUT "/profile/home" for 127.0.0.1 at 2016-10-06 21:32:46 -0400

ActionController::RoutingError (No route matches [PUT] "/profile/home"):

在rails scaffolding自动创建的更新方法中，它的一行在更新后进行重定向

    format.html { redirect_to home_url, notice: 'Your lex is set! Click Plan Meeting to plan some conversation topics.' }

希望它可以帮助其他人:)

最佳答案

看来您的错误是由控制器中的导轨strong params引起的，如以下行所示：app/controllers/meetings_controller.rb:95:in 'meeting_params'。

(param is missing or the value is empty: meeting)表示您的meeting_params方法缺少必需的密钥。因此，如果您的meeting_params看起来像：

def meeting_params
  params.require(:meeting).permit(....)
end

Rails正在寻找所需的meeting密钥。在第一个示例中，传入的参数为：

{"cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"khkj", "id"=>"76"}

Rails期望这样的参数哈希：

{"meeting" => {"cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"khkj", "id"=>"76"}}

修改您的ajax请求应注意这一点：

$.ajax({
        type: "PUT",
        url: '/meetings/'+id,
        data: {
          meeting: {
            id: id,
            cancel_user_id: userId,
            status: 'Cancelled',
            notes: cancelNotes
          }
        },...

第二次错误

当您在散列中实际传递meeting时，您的params可以理解为：

Parameters: {"meeting"=>"76", "cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"kjl", "id"=>"76"}

Rails实际上看到了meeting键，因为现在它已存在并在其上调用permit。但是，params[:meeting]返回字符串"76"。 Rails希望在permit上调用hash。因此，这就是为什么您看到第二个错误。

NoMethodError (undefined method `permit' for "76":String)