Mongodb on Ruby And Rails (froscon 2010)

on rails froscon 2010, st. augustin. jan krutisch <jan@krutisch.de> http://jan.krutisch.de/ Sonntag, 22. August 2010

mongodb wtf? lol!? Sonntag, 22. August 2010

document database Sonntag, 22. August 2010

NoS QL inclu ded! document database Sonntag, 22. August 2010

10gen Sonntag, 22. August 2010

open source http://github.com/mongodb/mongo Sonntag, 22. August 2010

id title descr pos_lat pos_lng Sonntag, 22. August 2010

no ﬁxed schema no migrations Sonntag, 22. August 2010

rich data structure Sonntag, 22. August 2010

{ "_id" : ObjectId("4c00245062610475a005afcd"), "address" : "Bernstorffstr. 174n22767 HamburgnDE", "description" : null, "position" : { "lat" : 53.5600912, "lng" : 9.9596977 }, "tags" : [ "hausarzt", "naturheilverfahren", "akupunktur", "allgemeinmedizin" ], "title" : "Dr. med. Lilo Eisenbarth", "loxicon_id" : 808261 } Sonntag, 22. August 2010

Sonntag, 22. August 2010

Sonntag, 22. August 2010 ✗

BSON Sonntag, 22. August 2010

BInary Serialized jsON http://bsonspec.org/ Sonntag, 22. August 2010

Lightweight Sonntag, 22. August 2010

Traversable Sonntag, 22. August 2010

Efﬁcient Sonntag, 22. August 2010

Wire Sonntag, 22. August 2010

Storage Sonntag, 22. August 2010

rich queries Sonntag, 22. August 2010

conceptually close to SQL Sonntag, 22. August 2010

easy to grasp Sonntag, 22. August 2010

ﬂexible Sonntag, 22. August 2010

language integration Sonntag, 22. August 2010

on top: map/reduce Sonntag, 22. August 2010

Scaling Sonntag, 22. August 2010

Master/Slave replication Sonntag, 22. August 2010

Replica Sets (1.6) Sonntag, 22. August 2010

Primary Member Member Sonntag, 22. August 2010

Primary Member Primary Sonntag, 22. August 2010

Member Member Primary Sonntag, 22. August 2010

Autosharding (1.6) Sonntag, 22. August 2010

Durability Sonntag, 22. August 2010

No single server durability! Sonntag, 22. August 2010

fsyncs every 60s (conﬁgurable) Sonntag, 22. August 2010

Use Replication! Sonntag, 22. August 2010

Use write propagation locking Sonntag, 22. August 2010

Single Server Durability planned for 1.8 Sonntag, 22. August 2010

mongo console Sonntag, 22. August 2010

$ mongo Sonntag, 22. August 2010

> use test switched to db test db.quotes.save({ text: "You can observe a lot just by watching.", from: "Yogi Berra", created_at: new Date() }); db.quotes.save({ text: "Silence is one of the hardest arguments to refute.", from: "Josh Billings", created_at: new Date() }); Sonntag, 22. August 2010

Indexing Sonntag, 22. August 2010

Same concept as with SQL databases Sonntag, 22. August 2010

You want them Sonntag, 22. August 2010

Same concept as with SQL databases Sonntag, 22. August 2010

Sort order Sonntag, 22. August 2010

Unique Sonntag, 22. August 2010

Compound Sonntag, 22. August 2010

Geospatial Sonntag, 22. August 2010

map/reduce Sonntag, 22. August 2010

we can haz it, too Sonntag, 22. August 2010

function() { this.tags.forEach(function(z) { emit(z, {count: 1}); }); } function(key, values) { var total = 0; values.forEach(function(v) { total += v }); return {count: total} } Sonntag, 22. August 2010

(it‘s not fast...) Sonntag, 22. August 2010

security Sonntag, 22. August 2010

simple user/password auth Sonntag, 22. August 2010

per database Sonntag, 22. August 2010

read only is possible Sonntag, 22. August 2010

one more thing Sonntag, 22. August 2010

GridFS Sonntag, 22. August 2010

Binary ﬁelds in BSON < 4MB Sonntag, 22. August 2010

GridFS saves ﬁles in chunks Sonntag, 22. August 2010

I‘m in u‘r rubies, querying teh MongoDB! Sonntag, 22. August 2010

core driver Sonntag, 22. August 2010

mongo / bson_ext Sonntag, 22. August 2010

ODMs / Libs Sonntag, 22. August 2010

mongo_mapper Sonntag, 22. August 2010

mongoid Sonntag, 22. August 2010

Find examples here: http://github.com/halfbyte/mongo_ruby_examples Sonntag, 22. August 2010

Basic driver usage Sonntag, 22. August 2010

init Sonntag, 22. August 2010

require 'mongo' @connection = Mongo::Connection.new @db = @connection.db("test") Sonntag, 22. August 2010

insert/upsert Sonntag, 22. August 2010

doc = { :text => "You can observe a lot just by watching.", :from => "Yogi Berra", :created_at => Time.now } @db['quotes'].insert(doc) Sonntag, 22. August 2010

doc = @db['quotes'].find_one(id) doc[:from] = "Yogi Berra, famous baseball player" @db['quotes'].save(doc) Sonntag, 22. August 2010

atomic updates Sonntag, 22. August 2010

@db['quotes'].update( {"from" => "Yogi Berra"}, {"$inc" => {"reads" => 1 } } ) Sonntag, 22. August 2010

$inc $addToSet $set $pop $unset $pull $push $pullAll $pushAll $ Sonntag, 22. August 2010

getting a whole collection Sonntag, 22. August 2010

@db['quotes'].find.each do |row| puts row.inspect end Sonntag, 22. August 2010

exact query Sonntag, 22. August 2010

@db['quotes'].find(:from => "Yogi Berra") Sonntag, 22. August 2010

more queries Sonntag, 22. August 2010

100.times do |i| db['numbers'].insert({"i" => i}) end Sonntag, 22. August 2010

db['numbers'].find("i" => {"$lt" => 2}) Sonntag, 22. August 2010

$lt < $gt > $lte <= $gte >= $ne != Sonntag, 22. August 2010

@db['people'].find(:tags => {"$in" => ['cool']}) Sonntag, 22. August 2010

obj = { "_id"=>BSON::ObjectID('4c706af16261040680000369'), "name"=>"Vernon Kreiger", "address"=>{ "street"=>"536 Haleigh Locks", "city"=>"Port Kiannahaven", "zip"=>"80730-0214", "country"=>"Fakistan" }, "tags"=>["cool", "weird"] } Sonntag, 22. August 2010

$in IN (2,3,4) $nin NOT IN $all [2,3] ~ [1,2,3] Sonntag, 22. August 2010

$mod yah, RLY $size okay $exists NOT NULL $type huh? Sonntag, 22. August 2010

@db['people'].find("address.city" => /haven/) Sonntag, 22. August 2010

Sorting Sonntag, 22. August 2010

@db['people'].find().sort("address.street") Sonntag, 22. August 2010

Pagination Sonntag, 22. August 2010

@db['numbers'].find.sort("i").limit(10) Sonntag, 22. August 2010

@db['numbers'].find.sort("i").limit(10).skip(50) Sonntag, 22. August 2010

Counting Sonntag, 22. August 2010

@db['numbers'].find.count Sonntag, 22. August 2010

Distinct Sonntag, 22. August 2010

@db['people'].distinct('tags').inspect Sonntag, 22. August 2010

Group Sonntag, 22. August 2010

Poor mans map/reduce Sonntag, 22. August 2010

Map / Reduce Sonntag, 22. August 2010

map = <<-END function() { this.tags.forEach(function(z) { emit(z, {count: 1}); }); } END reduce = <<-END function(key, values) { var total = 0; values.forEach(function(v) { total += v.count }); return {count: total} } END collection = @db['people'].map_reduce( map, reduce ) Sonntag, 22. August 2010

Indexes Sonntag, 22. August 2010

db['people'].create_index("tags") db['people'].drop_index("tags_1") db['people'].index_information Sonntag, 22. August 2010

GridFS usage Sonntag, 22. August 2010

grid = Mongo::Grid.new(@db) id = grid.put("You can put Strings in here", :filename => 'test.txt') file = grid.get(id) file.filename file.read grid.delete(id) grid.put( File.open("/Users/jankrutisch/Dropbox/Photos/IMGP8989.jpg") ) Sonntag, 22. August 2010

fs = Mongo::GridFileSystem.new(db) fs.open("test.txt", "w") do |f| f.write "You can put stuff in here" end fs.open("test.txt", "r") do |f| puts f.read end fs.delete("test.txt") Sonntag, 22. August 2010

Capped collections Sonntag, 22. August 2010

@db.create_collection('capped_numbers', :capped => true, :max => 50 ) @db.create_collection('capped_numbers', :capped => true, :size => 1024 * 64 ) Sonntag, 22. August 2010

ODMs Sonntag, 22. August 2010

mongo_mapper Sonntag, 22. August 2010

John Nunemaker @jnunemaker Sonntag, 22. August 2010

is in production Sonntag, 22. August 2010

documentation? Sonntag, 22. August 2010

how to Sonntag, 22. August 2010

rails initializer Sonntag, 22. August 2010

# config/initializers/mongo_mapper.rb File.open(File.join(Rails.root, 'config/mongodb.yml'), 'r') do |f| @settings = YAML.load(f)[Rails.env] end MongoMapper.connection = Mongo::Connection.from_uri(@settings["connection"]) if @settings["connection"] MongoMapper.database = @settings["database"] Sonntag, 22. August 2010

a simple example Sonntag, 22. August 2010

MongoMapper.connection = @connection MongoMapper.database = "test" class Quote include MongoMapper::Document key :from key :text key :views, Integer timestamps! end Sonntag, 22. August 2010

ﬁnders Sonntag, 22. August 2010

Quote.where(:from => 'Yogi Berra').all Quote.where(:from => 'Yogi Berra').limit(5).sort(:from.desc).all Sonntag, 22. August 2010

embedded docs Sonntag, 22. August 2010

class Person include MongoMapper::Document key :name one :address key :tags, Array end class Address include MongoMapper::Document key :street key :city key :country key :zip end Sonntag, 22. August 2010

person = Person.first address = Person.first.address Sonntag, 22. August 2010

scopes Sonntag, 22. August 2010

class Person scope :tagged, lambda { |tag| where(:tags.in => [tag]) } end puts Person.tagged('cool').first.inspect Sonntag, 22. August 2010

new website coming soon Sonntag, 22. August 2010

mongoid Sonntag, 22. August 2010

Durran Jordan (of Hashrocket) Sonntag, 22. August 2010

Two major versions Sonntag, 22. August 2010

1.x (1.9.x) targeting Rails 2.3.x Sonntag, 22. August 2010

2.x (2.0beta) targeting Rails 3.0 Sonntag, 22. August 2010

Good documentation Sonntag, 22. August 2010

rails initializer Sonntag, 22. August 2010

File.open(File.join(RAILS_ROOT, 'config/mongodb.yml'), 'r') do |f| @settings = YAML.load(f)[RAILS_ENV] end Mongoid::Config.instance.from_hash(@settings) Sonntag, 22. August 2010

a simple example Sonntag, 22. August 2010

class Quote include Mongoid::Document include Mongoid::Timestamps field :from field :text field :views, :type => Integer end Sonntag, 22. August 2010

ﬁnders Sonntag, 22. August 2010

Quote.where(:from => 'Yogi Berra').all Quote.where(:from => 'Yogi Berra').limit(5).order_by(:from.desc).all Sonntag, 22. August 2010

embedded docs Sonntag, 22. August 2010

class Person include Mongoid::Document field :name embeds_one :address field :tags, :type => Array end class Address include Mongoid::Document field :street field :city field :country field :zip end Sonntag, 22. August 2010

person = Person.first address = Person.first.address Sonntag, 22. August 2010

scopes Sonntag, 22. August 2010

class Person scope :tagged, lambda { |tag| where(:tags.in => [tag]) } end puts Person.tagged('cool').first.inspect Sonntag, 22. August 2010

More features Sonntag, 22. August 2010

atomic updates Sonntag, 22. August 2010

mongoid tries to be clever Sonntag, 22. August 2010

(using the „dirty“ ﬂags) Sonntag, 22. August 2010

(it‘s probably better to bypass the ODM sometimes) Sonntag, 22. August 2010

GridFS Sonntag, 22. August 2010

external libraries for both Sonntag, 22. August 2010

mongo_mapper > grip Sonntag, 22. August 2010

mongoid > mongoid_grid Sonntag, 22. August 2010

Other noteworthy libraries Sonntag, 22. August 2010

Candy Sonntag, 22. August 2010

mongodoc http://github.com/leshill/mongodoc Sonntag, 22. August 2010

mongo-record http://github.com/mongodb/mongo-record Sonntag, 22. August 2010

mongomodel http://github.com/spohlenz/mongomodel Sonntag, 22. August 2010

mongo_queue http://github.com/Skiz/mongo_queue Sonntag, 22. August 2010

resque-mongo http://github.com/ctrochalakis/resque-mongo Sonntag, 22. August 2010

my account Sonntag, 22. August 2010

Installation was easy Sonntag, 22. August 2010

(when on right platform) Sonntag, 22. August 2010

setting up replication Sonntag, 22. August 2010

$ mongod --master or master = true # mongodb.conf $ mongod --slave --source slaveserver.example.com slave = true source = slaveserver.example.com Sonntag, 22. August 2010

(see example on github) Sonntag, 22. August 2010

OpLog size! Sonntag, 22. August 2010

„security“ Sonntag, 22. August 2010

memory usage? Sonntag, 22. August 2010

limits? Sonntag, 22. August 2010

stability? Sonntag, 22. August 2010

I Sonntag, 22. August 2010

thanks for listening. ‣ http://www.mongodb.org/ ‣ http://www.mongoid.org/ ‣ http://github.com/jnunemaker/mongo_mapper ‣ http://github.com/halfbyte/mongo_ruby_examples ‣ jan@krutisch.de ‣ http://jan.krutisch.de/ ‣ http://github.com/halfbyte/ ‣ http://twitter.com/halfbyte ‣ http://www.mindmatters.de/ Sonntag, 22. August 2010

Mongodb on Ruby And Rails (froscon 2010)

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