Parse a string as if it were a querystring in Ruby on Rails

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The answer depends on the version of Rails that you are using. If you are using 2.3 or later, use Rack’s builtin parser for params 

 Rack::Utils.parse_nested_query("a=2") #=> {"a" => "2"}

If you are on older Rails, you can indeed use CGI::parse. Note that handling of hashes and arrays differs in subtle ways between modules so you need to verify whether the data you are getting is correct for the method you choose.

You can also include Rack::Utils into your class for shorthand access.

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