Parse ruby object in JavaScript (Rails)

Question

in my view i have one object, and want to work with this onject from javascript i try to

  var js_obj  = jQuery.parseJSON('<%=raw @rails_obj.to_json %>');

it works. but if i have "'" symbols, new string symbols, ,,, in this object all fails.

Have somebody know good approach to do it?

thx Falcon.........it helps me :). I'm facing the same problem. — manish nautiyal
– manish nautiyal, Commented Apr 25, 2012 at 6:16

iain · Accepted Answer · 2010-12-13 15:46:15Z

14

JSON is valid Javascript right out of the box, so why not just do:

var js_obj = <%= @rails_obj.to_json %>;

answered Dec 13, 2010 at 15:46

iain

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4 Comments

jwueller Over a year ago

+1! My brain left me. I cannot believe that i did not see that.

Falcon Over a year ago

JSON it isn't object - it just a text

jwueller Over a year ago

@Falcon: JSON is valid JavaScript. It works like this. JSON (JavaScript Object Notation) is a subset of JavaScript's syntax. This is the correct answer. Forget mine.

dnlmzw Over a year ago

I got some syntax errors and had to add <%= @rails_obj.to_json.to_s.html_safe %> in order for it to work.

Gerson Azevedo · Accepted Answer · 2013-09-05 19:59:14Z

3

I find this to be the best way. Worked everytime

 <%= javascript_tag "var obj = #{@obj.to_json}" %>

answered Sep 5, 2013 at 19:59

Gerson Azevedo

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Comments

jwueller · Accepted Answer · 2010-12-13 15:08:30Z

2

You need to escape all single-quotes then. ActionView has a helper for escaping JavaScript: ActionView::Helpers::JavaScriptHelper#escape_javascript

answered Dec 13, 2010 at 15:08

jwueller

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Comments

cyberfly · Accepted Answer · 2019-11-13 05:52:57Z

0

Rails 5.X

controller

def new
      @organization_json = Organization.first().to_json
end

view

<script>
    var organization_json = <%= @organization_json.html_safe %>;
<script>

answered Nov 13, 2019 at 5:52

cyberfly

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