Ajax error detected: Error occurred when attempting to submit form with POST method

I am currently using Rails to develop a webpage that allows users to submit contact information and create a contact object. The controller responsible for creating contacts is as follows:

def create
 @contact = Contact.new(contact_params)
 if @contact.save
  render json: @contact, status: :created
 else
  render json: @contact.errors.full_messages, status: :unprocessable_entity
 end
end

The "contact_params" method looks like this:

def contact_params
  params.require(:contact).permit(:name, :email, :phone, :company, :message)
end

Although the form works well when handling everything through a redirect, I would like to handle the creation process using JavaScript. While this approach has worked for me in the past without any issues, when I try running the following code:

$(document).ready(function(){
  $('#new_contact').on('submit', function(ev){
    ev.preventDefault()
    $.post({
      url: $(ev.target).attr('action'),
      data: new FormData(ev.target),
      processData: false,
      contentType: false,
      success: function(data){
        $('#new_contact').append('<div class="col-xs-12 col-sm-6 col-sm-  offset-3"><h3>Thanks for contacting me,' + data.name + '. I will get back to you as soon as I can.</h3></div>')
        document.getElementById('new_contact').reset()
        $('#new_contact input[type="submit"]').prop('disabled', false)
      },
      error: function(error){
        $('#new_contact').append('<div class="col-xs-12 col-sm-6 col-sm-offset-3"><h3>Sorry, I need at least a name and valid e-mail.</h3></div>')
        $('#new_contact input[type="submit"]').prop('disabled', false)
      }
    })
  })
})

However, upon hitting the post request, my server responds with the error message:

ActionController::RoutingError (No route matches [POST] "/[object%20Object]"):

This is an issue I have not come across before and I am uncertain of how best to address it. Any assistance on resolving this matter would be greatly appreciated.

Answer №1

To optimize your form submission process, consider incorporating Rails' remote option that facilitates handling forms using AJAX.

Incorporate the following code snippet in your view file to enable this functionality:

<%= form_for @contact, url: url_for(:controller => :contacts, :action => :create), remote: true, 'data-type': :json do |f| %>
  <!-- insert the remaining form fields here -->
<% end %>

Your controller's logic can remain unaffected as long as it continues to return JSON responses to the AJAX calls from the form. For JavaScript modifications, update your scripts with the following changes:

$(document).ready(function() {
  $("form#new_contact").on('ajax:success', function(event, data, status, xhr) {
    // Extract relevant information from the returned JSON structure stored in data.
    $('#new_contact').append('<div class="col-xs-12 col-sm-6 col-sm- offset-3"><h3>Thank you for reaching out,' + data.name + '. I will respond promptly.</h3></div>');
    document.getElementById('new_contact').reset();
    $('#new_contact input[type="submit"]').attr('disabled', false);
  });

  $("form#new_contact").on('ajax:error', function(event, xhr, status, error) {
    console.log("There was an issue with the AJAX request.");
    // Take appropriate measures to inform the user about the encountered problem.
  });
});

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