ユーザーの行動履歴をMongoDBに保存する ref: http://qiita.com/jacoyutorius/items/c31305f9f577edd3ffa1

action_log.rb

class ActionLog
  include Mongoid::Document

  field :datetime, type: DateTime
  field :user_id, type: String
  field :user_name, type: String
  field :controller, type: String
  field :method, type: String
  field :body, type: String
  field :delete, type: Boolean
end

application.rb

class Application < Rails::Application
  config.generators do |g|
    g.orm :active_record
  end
end

file0.txt

brew install mongodb

# インストール完了後のメッセージに従って、以下のコマンドを実行
ln -sfv /usr/local/opt/mongodb/*.plist ~/Library/LaunchAgents
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
mongo --version
 => MongoDB shell version: 2.6.4

file10.txt

rails g active_record:migration AddHoge

file2.txt

bundle install --path .bundle

file3.txt

rails g mongoid:config
 =>create  config/mongoid.yml

file4.txt

rails g mongoid:model action_log

file5.txt

rails g mongo:model action_log

file6.txt

irb(main):002:0> ActionLog.create!(datetime:Time.now, user_id:0, user_name:"jacoyutorius", body:"test")

=> #<ActionLog _id: 543df2987975746196000000, datetime: 2014-10-15 04:05:43 UTC, user_id: "0", user_name: "jacoyutorius", controller: nil, method: nil, body: "test", delete: nil>

file7.txt

irb(main):002:0> ActionLog.create!(datetime:Time.now, user_id:0, user_name:"jacoyutorius", body:"test")

=> #<ActionLog _id: 543df2987975746196000000, datetime: 2014-10-15 04:05:43 UTC, user_id: "0", user_name: "jacoyutorius", controller: nil, method: nil, body: "test", delete: nil>

file9.txt

irb(main):005:0> ActionLog.first
=> #<ActionLog _id: 543deed77975745d73000000, datetime: 2014-10-15 03:49:43 UTC, user_id: "1", user_name: "jacoyutorius", controller: "admin/top", method: nil, body: "{\"controller\"=>\"top\", \"action\"=>\"index\"}", delete: false>

Gemifle

gem "mongoid"
gem "bson_ext"

log_monger.rb

module LogMonger
  extend ActiveSupport::Concern

  included do 
      before_action :save_log

      def save_log
        ActionLog.create!(
          datetime: Time.now,
          user_id: 1,
          user_name: "jacoyutorius",
          method: params[:method],
          controller: params[:controller],
          body: params,
          delete: false
          )
      end

    end
end

users_controller.rb

class UsersController < ApplicationController
  include LogMonger

# -(省略)-
end