Rails - 从js.erb文件更改数据库中的布尔值 [英] Rails - Changing boolean in database from js.erb file

问题描述

在我的情况下，在rails应用程序共享内容到Facebook后，我会得到一个响应对象与post id

In my scenario in rails application after sharing content to facebook i will get a response object with post id

post_id: "mypostidhere"

如果不成功，我将获得一个错误消息的响应对象。

If its not successful i will get response object with an error message.

因此，根据响应，我想更改我的数据库表中当前用户的最后一行的布尔列。在我的 .js.erb 文件中，我试图访问 current_user.model.last ，但它会引发以下错误。

So according to the response i want to change a boolean column of last row for the current user in my database table. And for this in my .js.erb file i tried to access current_user.model.last but it throws the following error.

undefined local variable or method `current_user' for 

那么如何根据响应更改数据库中的布尔列？

So how can i change the boolean column in database according to the response?

UPDATED

Ajax代码

 $.ajax({
        type: "POST",
        url: "/action"
    });

控制器代码

def action
  current_user.modal.last.toggle!(:boolean-column-name)
end

它成功更改了表列。但之后，我在浏览器CONSOLE中收到错误，如下所示

It changes the table column successfully. But after that i am receiving an error in browser CONSOLE as below

POST http://URL/action
500 (Internal Server Error)

我在ajax请求中做错了什么？提前感谢。

I am new to AJAX. What i am doing wrong in ajax request? Thanks in advance.

推荐答案

如果要更改数据库，您必须与Rails应用程序通信，这是通过 ajax ：

If you want to change the db, you're going to have to communicate with your Rails app, which is done with ajax:

#app/assets/javascripts/application.js
... // your events will fire
$.ajax({
   url: "/users/update",
   method: "PUT",
   data: { param: "value" }
   success: function(data) {
      // do something here
   };
});

这将允许您执行以下操作：

This will allow you to do the following:

#config/routes.rb
resources :users do
   put :update, on: :collection
end

#app/controllers/users_controller.rb
class UsersController < ApplicationController
   def update
      current_user.update(update_params)
   end

   private

   def update_params
       params.permit(:param)
   end
end 

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