CODEWITHSUNDEEP
javascriptjqueryruby-on-railsarraysruby-on-rails-4
Rob
Rob

Reputation: 1855

Ruby array to js array in .js.erb file on rails

I'm trying to turn a ruby array into a js array in a js.erb file. I've checked all questions on this in stack overflow but it isn't working for me.

Here is the function

  function c(c) {
   js_array = <%= raw @keys.to_json %>;
   b.selection.remove(), b.html.insert('js_array[0]');
    }

It throws the error Uncaught TypeError: Cannot read property '0' of null

Im still learning js so im not sure what is going wrong here

The ruby @keys array defiantly has data in it because I'm printing that on the same page.

And if i change the array to js_array = ['gwfe', 'efw', 'efwe']; it works fine. This makes me believe something is going wrong when trying to convert the ruby array into a js array.

Upvotes: 2

Views: 1261

Answers (2)

Todd Drinkwater
Todd Drinkwater

Reputation: 447

After converting the array to JSON, you just need to mark it as HTML safe so it will render Javascript code.

This will do the trick:

<%= @keys.to_json.html_safe %>

Upvotes: 2

Jeremy Rajan
Jeremy Rajan

Reputation: 662

I assume, you are gettings @keys data from db or local. Could you try gon gem to pass the values from ruby to js. Here is the railscast tutorial for the same: http://railscasts.com/episodes/324-passing-data-to-javascript?view=asciicast

And see, if that works.

Let me know.

Upvotes: 1

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