Pretty print a JSON object created in Ruby to Chrome browser console

Question

I'm parsing a Ruby object into JSON, rendering it in a js.erb file, and printing it to console (Chrome Browser).

In my js.erb file, when I print this:

console.log("<%= @search.attributes.to_json %>")

I get this:

{"id":124,"period_start":null,"period_end":null,"user_id":null,"created_at":"2015-01-04T05:54:05.133Z","updated_at":"2015-01-04T05:54:05.133Z","onscreen_people_rank_lower":null,"onscreen_people_rank_upper":null,"incl_onscreen_people_unranked":null,"offscreen_people_rank_lower":null,"offscreen_people_rank_upper":null,"incl_offscreen_people_unranked":null}

which is very hard to read. I want to make the JSON pretty so that I can read it more easily.

In my js.erb file, I've tried this:

console.log(eval("(" + "<%= @search.attributes.to_json %>" + ")"))

and this:

console.log( jQuery.parseJSON("<%= @search.attributes.to_json %>") )

and this:

console.log( "<%= JSON.pretty_generate(@search.attributes) %>" )

but none work--the code is not evaluated and nothing is outputted. What am I doing wrong?

Answer 1

Expanding on Cba Bhusal's answer, this worked for me the best:

console.log("<%= j JSON.pretty_generate(@search.attributes).html_safe %>");

The escape_javascript was needed to escape quotes, while the JSON.pretty_generate inserted whitespace to make it even prettier. The output in Chrome console looks like this:

{
  "id": 138,
  "user_id": null,
  "created_at": "2015-01-04T15:57:23.110Z",
  "updated_at": "2015-01-04T15:57:23.110Z"
  #...
}

Answer 2

its pretty simple, try this

console.log("<%= @search.attributes.to_json.html_safe %>")