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How to use JavaScript to parse Ruby JSON string

I am trying to get a JSON object from a JSON output string from a Rails application. Currently in JavaScript I am doing:

data = "<%= @chromosomes.html_safe %>";

However, since there are quotes at the beginning and end of the JSON object, it does not appear as a JSON object. Instead, it does something like

 data = "[{"name":"YHet","organism_id":"4ea9b90e859723d3f7000037"}]"

Is there a way to strip the leading and trailing quotes so that the object is treated as an array instead of a string?

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5 answers


Why don't you do:

data = <%= @chromosomes.html_safe %>;

Sidenote:



Hopefully you can do something like:

@chromosomes = [{ name: "YHet", organism_id: "foo" }].to_json
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If you are using jQuery you can do the following



var data = jQuery.parseJSON('[{"name":"YHet","organism_id":"4ea9b90e859723d3f7000037"}]');
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Use eval:

var dataObject = eval ('(' + dataString + ')');

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Use an object JSON

that is included in most browsers, or if you are using jQuery, use a method $.jsonParse

that tries to use the object JSON

if it is otherwise defined, parsing with eval

or in a safer way.

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On the controller

@my_var = MyObj.find_by_id(4).to_json

On the page in haml mode.

var my_json = $.parseJSON("#{j @my_var}"); //used JQuery to parser JSON string
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