用ajax更改rails值

I am trying to change a rails value with ajax and I am having trouble. Here is what I have so far.

ajax

$(button).click(function(){
        $.ajax({
           url: '/change_value',
           type: 'GET'
    })
});

Controller

def home
  @value = 0
end

def change_value
  @value = 1
end

routes

get '/change_value', to: 'static_pages#change_value'

Thank you for all the help.

You need to create a view to respond in js format:

change_value.js.erb

var newValue = <%= @value %>;

Now, use it in your script:

$(button).click(function(){
        $.ajax({
           url: '/change_value',
           type: 'GET',
           success: function(data) {
               console.log(newValue);
           }
    })
});