Using Ajax to GET data from Rails controller

Question

I am trying to get an instance of a modal (in JSON format) by using Ajax when a form is submitted. Currently, on the alert, it outputs nothing, blank.

alert('<%= @modal_data.to_json.html_safe %>'); outputs JSON data, but alert(data); called through Ajax does not output anything.

Controller

class ModalController < ApplicationController
  def modal_index
    @modal_data = Modal.where(:var => params[:attr1])
    respond_to do |format|
      format.html
      format.json {render json: @modal_data}
    end
  end
end

JavaScript

$(document).ready(function() {
  $('#my_form').on("submit", function () {
    $.ajax({
      type: "GET",
      dataType: "json",
      url: "/modal/modal_index",
      success: function(data){
        alert(data);
      }
    });
  });
});

First, make sure you provide params[:attr1].

nersoh
– nersoh

2015-09-11 20:23:30 +00:00
Commented Sep 11, 2015 at 20:23 — nersoh
– nersoh, Commented Sep 11, 2015 at 20:23

KensoDev · Accepted Answer · 2015-09-11 20:23:49Z

1

In order for this to work with JSON you need to set the content type to application/json.

if your $.ajax call

$(document).ready(function() {
  $('#my_form').on("submit", function () {
    $.ajax({
      type: "GET",
      contentType: "application/json",      
      url: "/modal/modal_index",
      success: function(data){
        alert(data);
      }
    });
  });
});

Also, it doesn't seem you provided the param needed to find the model (attr1).

Keep your controllers standard, pass id or item_id to get in order to get the object you need.

answered Sep 11, 2015 at 20:23

KensoDev

3,28523 silver badges38 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Senju Over a year ago

Woops, yea I forgot the param... after that it worked. Also, I tried using contentType: "application/json", but that returned an html page instead of a json object. dataType: "json" seemed to work.

Collectives™ on Stack Overflow

Using Ajax to GET data from Rails controller

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related