Rails：sign_out current_user 不工作？

Question

I am trying to logout a user session after idle time. I have a controller action in sessions_controller.rb with the below code.

  def inactivity
    flash.now[:alert] = 'Logged out due to inactivity.'
    flash.keep(:alert)
    sign_out current_user
    head :ok
  end

below is the relevant js code which gets triggered after idle time and redirects the user to the sign out page

Session.inactivity().then(function() {
 localStorage.removeItem(idleTimeCaptureKeyName);
 Turbolinks.visit('/users/sign_in');
}).catch(function(err) {
});

Session.inactivity code is below

  const inactivity = () => {
    return new Promise((resolve, reject) => {
      $.ajax({
        url: '/inactivity',
        method: 'POST',
        beforeSend: function(xhr) {
          xhr.setRequestHeader('X-CSRF-Token',$('meta[name="csrf-token"]').attr('content'));
        },
        success: function(res) {
          resolve(true);
        },
        error: function(err) {
          reject(false);
        }
      })
    });
  }

I am seeing a strange issue where possibly sign_out current_user is not working. I see sporadically the user is redirected to home page with a message you are already signed in .

I am unable to reproduce the issue consistently. below is my question

1. what scenario could cause this and how can i reproduce and fix this

Answer 1

If the Session.inactivity() do request to server you have to make sure that user really logged out and you get proper response. I suppose that some times the then runs earlier then you get the response.