How to get a specific value from url params generated by Ransack gem for Ruby on Rails from JavaScript

Question

My url looks like this:

http://localhost:3000/ads?utf8=✓&q%5Bbrand_eq%5D=ALFA+ROMEO&q%5Bmodel_eq%5D=GTV+%26+Spider&commit=Search

(generated by Ransack gem)

I want to receive from it 'model_eq' value, which in this example should look like this:

GTV & Spider

Is there any painless method to do this from JavaScript (CoffeeScript) in Rails?

Answer 1

You can use regex to extract data from the URL.

var url = 'http://localhost:3000/ads?utf8=✓&q%5Bbrand_eq%5D=ALFA+ROMEO&q%5Bmodel_eq%5D=GTV+%26+Spider&commit=Search';

var model = (url.match(/model_eq.*?=(.+)&/) || [])[1];
alert(decodeURIComponent(model));

The regex will extract the text that is after model_eq=.