MongoDBに接続するためのRuby on Railsフレームワークアプリケーション チュートリアル

rails new todo -O

gem"mongo_mapper"

bundle install

MongoMapper.connection = Mongo::Connection.new('localhost', 27017)


MongoMapper.database = 'todo' # By specifying the Rails runtime environment parameters, we can create data in different runtime environments without interfering with each other; for simplicity, different data is not specified for different environments

if defined?(PhusionPassenger)

  PhusionPassenger.on_event(:starting_worker_process)do|forked|

    MongoMapper.connection.connectifforked

  end

end

$ rails server

**Notice: C 拡張はロードされていません。これは MongoDB Ruby ドライバのパフォーマンスを最適化するために必要です。

拡張モジュールは次のようにしてインストールできます。

gem install bson_ext

If you continue to receive this message after installing, make sure that the

bson_ext gem is in your load path and that the bson_ext and mongo gems are of the same version.

=> Booting WEBrick

=> Rails 3.0.10 application starting in development on http://0.0.0.0:3000

=> Call with -d to detach

=> Ctrl-C to shutdown server

[2011-10-19 23:36:14] INFO WEBrick 1.3.1

[2011-10-19 23:36:14] INFO ruby 1.9.2 (2011-07-09) [x86_64-linux]

[2011-10-19 23:36:14] INFO WEBrick::HTTPServer#start: pid=19595 port=3000

rails generate scaffold project name:string --orm=mongo_mapper

classProject

  include MongoMapper::Document

  key:name,String

end

mongo // enter the database

use todo // switch libraries

db.projects.find() //execute the query

validates_presence_of:name

classProject

  include MongoMapper::Document

  key:name,String,:required=>true

  key:priority,Integer

end

#! /usr/local/bin/ruby
# date: 06-12-2014
# auther: lucifer
# use fsync and lock to the file-system before backup the file-system
# mongo-ruby-driver version > 1.10.0

require 'mongo'
require 'fileutils'
require 'date'

include Mongo
include BSON

# the members of replcation-set
# test mongodb server version 2.6.0
# host = "192.168.11.51"

# The port of members
# If the port is 27017 by default then otherport don't need to assignment
# otherport = ""
# port = otherport.length ! = 0 ? otherport : MongoClient::DEFAULT_PORT

# opts = {:pool_size => 5, :pool_timeout => 10}
# Create a new connection
# client = MongoClient.new(host, port, opts)

uri_string = "mongodb://caoqing:[email protected]:27017/admin"
client = MongoClient.from_uri(uri = "#{uri_string}")
db = client['admin']

# fsync and lock the database
cmd = OrderedHash.new
cmd[:fsync] = 1
cmd[:lock] = true
# p cmd
db.command(cmd)

# datafile path
d = "/var/lib/mongo"

# dir = Dir.new("#{d}")
# entries = dir.entries
# entries.delete_if { |entry| entry =~ /^\. /}
# convert the relative path to the full path
# entries.map! { |entry| File.join(dir.path, entry) }
# maintain only the type of file
# entries.delete_if { |entry| !File.file?(entry) }
# p entries

start = Date.today.to_s
prev = (Date.today - 7).to_s

dest = "/backup/#{start}"
sour = "/backup/#{prev}"

FileUtils.rm_rf("#{sour}") if File::exists?("#{sour}")

Dir.mkdir("#{dest}", 0755) unless File::exists?("#{dest}")

FileUtils.cp_r Dir.glob("#{d}/**"), dest if client.locked?

puts "*" * 20
puts "\tbackup complete"
puts "*" * 20

# DB::SYSTEM_COMMAND_COLLECTION
# unlock the database
db["$cmd.sys.unlock"].find_one
client.close