Question

我有一个点击事件触发了对rails应用中记录的更新。服务器错误是会议无法识别字符串，因此我将id转换为int。然后我遇到了路障。我尝试了两种不同的方式，服务器错误都低于

$('.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log typeof id时，它表示数字。但是当我运行它时，会给出下面的错误。

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'

在上面粘贴的ajax调用中，它确实声明了meeting：id，尝试修复它，并且它收到此错误

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？特别是考虑到我使用网址将其直接发送到控制器，所以它不应该只是通过网址传递id？

任何关于为什么这不起作用的线索表示赞赏。谢谢！

******* ******* UPDATE

感谢下面的答案，我能够正确传递参数，但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脚手架自动创建的更新方法中，它有一行在更新后重定向

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

希望它可以帮助别人：）

Answer 1

您的错误似乎是由控制器中的导轨app/controllers/meetings_controller.rb:95:in 'meeting_params'引起的，如下所示：(param is missing or the value is empty: meeting)。

meeting_params表示您的meeting_params方法缺少必需的密钥。因此，如果您的def meeting_params params.require(:meeting).permit(....) end看起来像：

meeting

Rails正在寻找所需的{"cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"khkj", "id"=>"76"}密钥。在你的第一个例子中，传入的参数是：

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

Rails期待像这样的params哈希：

ajax

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

meeting

第二次错误

当您实际在哈希中传递params时Parameters: {"meeting"=>"76", "cancel_user_id"=>"1", "status"=>"Cancelled", "notes"=>"kjl", "id"=>"76"}彻底通过：

meeting

Rails实际上会看到permit密钥，因为它现在存在并在其上调用params[:meeting]。但是，"76"会返回字符串permit。 Rails希望在hash上拨打NoMethodError (undefined method `permit' for "76":String)。因此，这就是为什么你看到第二个错误。

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ajax提出请求不接受para中的id

1 个答案: