How do I pass an Array of ids from Rails 3 controller to a Javascript Array?

Question

Im trying to grab the ids of the images using rails, pass those ids to javascript and then flip through them using a javascript Image Viewer.

This is what I have in my rails controller

@rails_array = Images.all

this is in my view file

<script type="text/javascript" >
 var myIds=new Array(<% @rails_array %>);
</script>

Raj · Accepted Answer · 2013-11-10 13:51:50Z

3

You can collect Ids from controller like this:

@rails_array = Images.all.map &:id

In the View:

<script type="text/javascript" >
   var myIds= <%= @rails_array %>
</script>

edited Nov 10, 2013 at 13:51

Raj

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answered Nov 29, 2011 at 6:48

Srikanth Jeeva

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Marc-André Lafortune · Accepted Answer · 2011-11-29 06:47:45Z

2

A good way to pass any object to javascript is through JSON:

var myId= <%= @rails_array.to_json %> ;

Note: You'll need to append .html_safe for strings & hashes (or arrays containing them), but it isn't needed for arrays of integers.

answered Nov 29, 2011 at 6:47

Marc-André Lafortune

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Comments

Awais Qarni · Accepted Answer · 2011-11-29 06:43:33Z

1

Hi have you tried split() method of javascript

 <script type="text/javascript">
  var myId=<% @rails_array %>.split(/,/);
 </script>

answered Nov 29, 2011 at 6:43

Awais Qarni

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