Controller responses often include Javascript code that contains values from Ruby variables. E.g. you want to call a Javascript function foo(...) with the argument stored in the Ruby variable @foo. You can do this by using ERB tags (<%= ruby_expression %>) or, in Haml, interpolation syntax (#{ruby_expression}).
In any case you will take care of proper quoting and escaping of quotes, line feeds, etc. A convenient way to do this is to use
Object#json
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, which is defined for Ruby strings, numbers, arrays and hashes:
Tree.init({
path: <%= tree_url(@tree).to_json %>,
child_ids: <%= @tree.child_ids.to_json %>
});
The output of #to_json will be properly quoted and escaped. There is no need to wrap it with your own quotes.
Posted by Henning Koch to makandra dev (2012-04-30 08:26)