README.md in flipper-mongo-0.3.0 vs README.md in flipper-mongo-0.5.0

@@ -1,8 +1,8 @@
 # Flipper Mongo
 
-A mongo adapter for [Flipper](https://github.com/jnunemaker/flipper), the feature flipping gems.
+A [MongoDB](https://github.com/mongodb/mongo-ruby-driver) adapter for [Flipper](https://github.com/jnunemaker/flipper).
 
 ## Installation
 
 Add this line to your application's Gemfile:
 
@@ -18,13 +18,63 @@
 
 ## Usage
 
 ```ruby
 require 'flipper/adapters/mongo'
-collection = Mongo::Connection.new.db('testing')['flipper']
-adapter = Flipper::Adapters::Mongo.new(collection, 'features')
+collection = Mongo::MongoClient.new.db('testing')['flipper']
+adapter = Flipper::Adapters::Mongo.new(collection)
 flipper = Flipper.new(adapter)
 # profit...
+```
+
+## Internals
+
+Each feature is stored in a document, which means getting a feature is single query.
+
+```ruby
+require 'flipper/adapters/mongo'
+collection = Mongo::MongoClient.new.db('testing')['flipper']
+adapter = Flipper::Adapters::Mongo.new(collection)
+flipper = Flipper.new(adapter)
+
+# Register a few groups.
+Flipper.register(:admins) { |thing| thing.admin? }
+Flipper.register(:early_access) { |thing| thing.early_access? }
+
+# Create a user class that has flipper_id instance method.
+User = Struct.new(:flipper_id)
+
+flipper[:stats].enable
+flipper[:stats].enable flipper.group(:admins)
+flipper[:stats].enable flipper.group(:early_access)
+flipper[:stats].enable User.new('25')
+flipper[:stats].enable User.new('90')
+flipper[:stats].enable User.new('180')
+flipper[:stats].enable flipper.random(15)
+flipper[:stats].enable flipper.actors(45)
+
+flipper[:search].enable
+
+puts 'all docs in collection'
+pp collection.find.to_a
+# all docs in collection
+# [{"_id"=>"stats",
+#   "actors"=>["25", "90", "180"],
+#   "boolean"=>"true",
+#   "groups"=>["admins", "early_access"],
+#   "percentage_of_actors"=>"45",
+#   "percentage_of_random"=>"15"},
+#  {"_id"=>"flipper_features", "features"=>["stats", "search"]},
+#  {"_id"=>"search", "boolean"=>"true"}]
+
+puts 'flipper get of feature'
+pp adapter.get(flipper[:stats])
+# flipper get of feature
+# {:boolean=>"true",
+#  :groups=>#<Set: {"admins", "early_access"}>,
+#  :actors=>#<Set: {"25", "90", "180"}>,
+#  :percentage_of_actors=>"45",
+#  :percentage_of_random=>"15"}
 ```
 
 ## Contributing
 
 1. Fork it