What additional requirements are needed for Rails and remote AJAX with the "true" setting?

I'm a bit confused about the purpose of remote:true in Rails forms. I initially thought that it required some Javascript to enable asynchronous functionality, but instead it seems to be causing issues with my page.

Below is a simple index.html.haml file that includes a partial for displaying all appointments:

%h1 Calendar

%h2 AppointmentsController
%h3 Make a new appointment

= form_for @appointment, remote: true do |f|
  = f.text_field :title
  = f.text_field :appt_time
  = f.submit 'Make appointment'

#appointments
  =render 'appointments'

Here's the mentioned partial:

    <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="f8d5b89988889791968c959d968c8bd69d999b90">[email protected]</a> do |a|
  %h3= a.title
  %p= a.appt_time

Controller methods for index and create:

 def index
    @appointments = Appointment.order('appt_time ASC')
    @appointment = Appointment.new
  end

  def create
    @appointmet = Appointment.create(appointment_params)
    redirect_to :root
  end

So far everything seems to be working correctly. I can add a new appointment, submit the form, and see the new appointment appear without the page refreshing, thanks to the inclusion of remote: true. However, I'm wondering if there are any additional steps needed to handle this request properly or if relying solely on remote: true is sufficient. Am I potentially not following best practices by omitting additional handling for this request?

Answer №1

If you don't need any further assistance, unless you are looking for a callback following an ajax call. It seems like you have followed all the usual conventions. For more clarity, refer to this guide.

Answer №2

Let's backtrack for a moment.

Websites can handle requests in various formats. Rails comes with its own format handling feature.

For example, a request may ask for the index page in HTML format, which will return an HTML file. It could also request the index page in JSON, XML, PDF, or even JavaScript format.

When you include remote: true, you are instructing your form to send a POST request via JavaScript instead of HTML.

In your views folder, you will find several HTML.ERB files. These files serve as responses to incoming requests.

To handle a JavaScript request for the index page, you'll need an app/views/appointments/index.js file.

This file will be sent back as the response to the request, and the browser will know how to interpret a JavaScript response.

Within the index.js file, you can write JavaScript code that will run once the response is received.

You can also load partials onto the webpage.

For instance:

# app/views/appointments/index.js
$('#appointments').html('<%= j render "appointments" %>')

This code snippet renders the content of a partial as a JavaScript string in the response.

http://guides.rubyonrails.org/working_with_javascript_in_rails.html

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