1 files changed, 27 insertions, 0 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/to_query.rb b/activesupport/lib/active_support/core_ext/object/to_query.rb
new file mode 100644
index 0000000000..3f1540f685
--- /dev/null
+++ b/activesupport/lib/active_support/core_ext/object/to_query.rb
@@ -0,0 +1,27 @@
+require 'active_support/core_ext/object/to_param'
+
+class Object
+  # Converts an object into a string suitable for use as a URL query string, using the given <tt>key</tt> as the
+  # param name.
+  #
+  # Note: This method is defined as a default implementation for all Objects for Hash#to_query to work.
+  def to_query(key)
+    require 'cgi' unless defined?(CGI) && defined?(CGI::escape)
+    "#{CGI.escape(key.to_s)}=#{CGI.escape(to_param.to_s)}"
+  end
+end
+
+class Array
+  # Converts an array into a string suitable for use as a URL query string,
+  # using the given +key+ as the param name.
+  #
+  #   ['Rails', 'coding'].to_query('hobbies') # => "hobbies%5B%5D=Rails&hobbies%5B%5D=coding"
+  def to_query(key)
+    prefix = "#{key}[]"
+    collect { |value| value.to_query(prefix) }.join '&'
+  end
+end
+
+class Hash
+  alias_method :to_query, :to_param
+end