andresf

# This is a simple refactoring exercise.
#
# What to do?
#
# 1. Look at the code of the class CorrectAnswerBehavior
# 2. Try to see what it does by running `ruby refactoring_example.rb` 
# 3. Record characterisation tests by running `ruby refactoring_example.rb --record`
# 4. Make the code beautiful;)
# 5. You are allowed to modify only the code between markers (REFACTORING START/REFACTORING END).
# 6. Test must pass! You can run them with command `ruby refactoring_example.rb --test`

andresf

module ActiveModel
  class Errors
    def error_types
      @_error_types ||= Hash.new { |hash, key| hash[key] = [] }
    end

    def add_with_save_names(attribute, message = nil, options = {})
      message ||= :invalid
      message = message.call if message.is_a?(Proc)
      error_types[attribute] << message

andresf

For Mongoid 2.4.x:

collection = Mongoid.master.collections("libraries")
collection.find({ user_id: current_user.id }, fields: { documents: 1 }).entries.to_json

For Mongoid 3.x:

Library.collection.find({ user_id: current_user.id }).select(documents: 1).to_json