Add ActionController::Parameters#to_hash to implict conversion

Now methods that implicit convert objects to a hash will be able to work
without requiring the users to change their implementation.

This method will return a Hash instead of a HashWithIndefirentAccess
to mimic the same implementation of HashWithIndefirentAccess#to_hash.

1 files changed, 16 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index b20ad940ea..62c654da03 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -259,6 +259,22 @@ module ActionController
       end
     end
 
+    # Returns a safe <tt>Hash</tt> representation of this parameter
+    # with all unpermitted keys removed.
+    #
+    #   params = ActionController::Parameters.new({
+    #     name: 'Senjougahara Hitagi',
+    #     oddity: 'Heavy stone crab'
+    #   })
+    #   params.to_hash
+    #   # => ActionController::UnfilteredParameters: unable to convert unfiltered parameters to hash
+    #
+    #   safe_params = params.permit(:name)
+    #   safe_params.to_hash # => {"name"=>"Senjougahara Hitagi"}
+    def to_hash
+      to_h.to_hash
+    end
+
     # Returns an unsafe, unfiltered
     # <tt>ActiveSupport::HashWithIndifferentAccess</tt> representation of this
     # parameter.