to_param

Converts a hash into a string suitable for use as a URL query string. An optional namespace can be passed to enclose the param names (see example below). The string pairs “key=value” that conform the query string are sorted lexicographically in ascending order.

Examples

{ :name => 'David', :nationality => 'Danish' }.to_param # => "name=David&nationality=Danish"

{ :name => 'David', :nationality => 'Danish' }.to_param('user') # => "user[name]=David&user[nationality]=Danish"