如何使用 JavaScript 解析 Ruby JSON 字符串

Question

I'm trying to get the JSON object from a JSON outputted string from a Rails app. Currently in JavaScript I'm doing:

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

However, since there are quotes at the beginning and end of the JSON object, it is not being rendered as a JSON object. Instead it is doing something like

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

Is there a way that I can remove the beginning and end quotes so that the object is treated as an array instead of a string?

Answer 1

Why don't you do:

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

Sidenote:

I hope you do something like:

@chromosomes = [{ name: "YHet", organism_id: "foo" }].to_json

Answer 2

If you are using jQuery you can do the following

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

Answer 3

Use JSON object that is included in most of browsers or if you are using jQuery use $.jsonParse method that try to use JSON object if defined otherwise parse using eval or some safer way.

Answer 4

On controller

@my_var = MyObj.find_by_id(4).to_json

On page in haml way.

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

Answer 5

Use eval:

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