Added support for Mongoid 4.x.

[dblock]

Mongoid 4.x has removed Mongoid::Observer, so we use that to test for the Mongoid version. There're two changes: inc takes a hash and index_specifications replaced index_options.

I did a bit of upgrading of default mongoid versions in Gemfile, ran all these:

rm Gemfile.lock ; MONGOID_VERSION=2 bundle install ; MONGOID_VERSION=2 bundle exec rspec spec/mongoid/orderable_spec.rb # also with Ruby 1.8.7
rm Gemfile.lock ; MONGOID_VERSION=3 bundle install ; MONGOID_VERSION=3 bundle exec rspec spec/mongoid/orderable_spec.rb
rm Gemfile.lock ; MONGOID_VERSION=4 bundle install ; MONGOID_VERSION=4 bundle exec rspec spec/mongoid/orderable_spec.rb

[pyromaniac]

Amazing! But could you remove 1.9.2 support, or fix it please?

[dblock]

Fixed, amended.

[pyromaniac]

Fukken incredible, thanks!

[dblock]

Don't mention it :-)

[dblock]

Oh and thanks for the gem, we use it at http://artsy.net all over the place.

[pyromaniac]

Taso Du Val, who is sitting right next to me, says "Hello".

[pyromaniac]

Also, you are welcome.