Overview

Fixes #108.

• Modifies RailsSettings::SettingObject#_get_value so that it returns a "deep dup" of the default value, as opposed to a direct reference to the default value.
• Adds tests for the cases where a default value is an Array or Hash

How to test

Pull in RailsSettings::SettingObject from master and run tests:

git co master lib/rails-settings/setting_object.rb
bundle exec rspec

The new tests fail (along with an additional test that is affected by this, since User.default_settings gets modified).

Alternatively, you can use the code in the issue referenced above to reproduce.

Notes

This approach to using Marshal to deep dup an object is documented in the book "The Ruby Programming Language" (page 83):

Another use for Marshal.dump and Marshal.load is to create deep copies of objects:

def deepcopy(o)
  Marshal.load(Marshal.dump(o))
end

Flanagan, David. The Ruby Programming Language. “O’Reilly Media, Inc.,” 2008.