CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-3
gjb
gjb

Reputation: 6317

Rails: Opposite of Hash#to_param

If I convert a hash to a query string, how can I convert it back again?

{:filters => {:colour => ['Red', 'Blue'], :size => 'Medium'}}.to_param
=> "filters[colour][]=Red&filters[colour][]=Blue&filters[size]=Medium"

Rails appears to do this automatically when it populates the params hash, but is it possible to call this method directly?

Thanks.

Upvotes: 15

Views: 6030

Answers (2)

Ryan Bigg
Ryan Bigg

Reputation: 107728

You're looking for Rack::Utils.parse_nested_query(query), which will convert it back into a Hash. You can get it by using this line:

require 'rack/utils'

Upvotes: 31

Patrick Klingemann
Patrick Klingemann

Reputation: 9014

query_string = "filters[colour][]=Red&filters[colour][]=Blue&filters[size]=Medium"
CGI::parse(query_string)

Upvotes: 1

Related Questions