1.
on rails
froscon 2010, st. augustin.
jan krutisch <jan@krutisch.de>
http://jan.krutisch.de/
Sonntag, 22. August 2010

2.
mongodb wtf? lol!?
Sonntag, 22. August 2010

3.
document database
Sonntag, 22. August 2010

4.
NoS
QL
inclu
ded!
document database
Sonntag, 22. August 2010

5.
10gen
Sonntag, 22. August 2010

6.
open source
http://github.com/mongodb/mongo
Sonntag, 22. August 2010

7.
id title descr pos_lat pos_lng
Sonntag, 22. August 2010

8.
no fixed schema
no migrations
Sonntag, 22. August 2010

9.
rich data structure
Sonntag, 22. August 2010

10.
{
"_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

11.
Sonntag, 22. August 2010

12.
Sonntag, 22. August 2010
✗

13.
Sonntag, 22. August 2010

14.
BSON
Sonntag, 22. August 2010

15.
BInary Serialized jsON
http://bsonspec.org/
Sonntag, 22. August 2010

16.
Lightweight
Sonntag, 22. August 2010

17.
Traversable
Sonntag, 22. August 2010

18.
Efficient
Sonntag, 22. August 2010

19.
Wire
Sonntag, 22. August 2010

20.
Storage
Sonntag, 22. August 2010

21.
rich queries
Sonntag, 22. August 2010

22.
conceptually close to SQL
Sonntag, 22. August 2010

23.
easy to grasp
Sonntag, 22. August 2010

24.
flexible
Sonntag, 22. August 2010

25.
language integration
Sonntag, 22. August 2010

26.
on top: map/reduce
Sonntag, 22. August 2010

27.
Scaling
Sonntag, 22. August 2010

28.
Master/Slave replication
Sonntag, 22. August 2010

29.
Replica Sets (1.6)
Sonntag, 22. August 2010

30.
Primary
Member Member
Sonntag, 22. August 2010

31.
Primary
Member Primary
Sonntag, 22. August 2010

32.
Member
Member Primary
Sonntag, 22. August 2010

33.
Autosharding (1.6)
Sonntag, 22. August 2010

34.
Sonntag, 22. August 2010

35.
Durability
Sonntag, 22. August 2010

36.
No single server
durability!
Sonntag, 22. August 2010

37.
fsyncs every 60s
(configurable)
Sonntag, 22. August 2010

38.
Use Replication!
Sonntag, 22. August 2010

39.
Use write propagation
locking
Sonntag, 22. August 2010

40.
Single Server Durability
planned for 1.8
Sonntag, 22. August 2010

41.
mongo console
Sonntag, 22. August 2010

42.
$ mongo
Sonntag, 22. August 2010

43.
> 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

44.
Indexing
Sonntag, 22. August 2010

45.
Same concept as with
SQL databases
Sonntag, 22. August 2010

46.
You want them
Sonntag, 22. August 2010

47.
Same concept as with
SQL databases
Sonntag, 22. August 2010

48.
Sort order
Sonntag, 22. August 2010

49.
Unique
Sonntag, 22. August 2010

50.
Compound
Sonntag, 22. August 2010

51.
Geospatial
Sonntag, 22. August 2010

52.
map/reduce
Sonntag, 22. August 2010

53.
we can haz it, too
Sonntag, 22. August 2010

54.
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

55.
(it‘s not fast...)
Sonntag, 22. August 2010

56.
security
Sonntag, 22. August 2010

57.
simple user/password
auth
Sonntag, 22. August 2010

58.
per database
Sonntag, 22. August 2010

59.
read only is possible
Sonntag, 22. August 2010

60.
one more thing
Sonntag, 22. August 2010

61.
GridFS
Sonntag, 22. August 2010

62.
Binary fields in BSON
< 4MB
Sonntag, 22. August 2010

63.
GridFS saves files in
chunks
Sonntag, 22. August 2010

64.
I‘m in u‘r rubies,
querying teh MongoDB!
Sonntag, 22. August 2010

65.
core driver
Sonntag, 22. August 2010

66.
mongo / bson_ext
Sonntag, 22. August 2010

67.
ODMs / Libs
Sonntag, 22. August 2010

68.
mongo_mapper
Sonntag, 22. August 2010

69.
mongoid
Sonntag, 22. August 2010

70.
Find examples here:
http://github.com/halfbyte/mongo_ruby_examples
Sonntag, 22. August 2010

71.
Basic driver usage
Sonntag, 22. August 2010

72.
init
Sonntag, 22. August 2010

73.
require 'mongo'
@connection = Mongo::Connection.new
@db = @connection.db("test")
Sonntag, 22. August 2010

74.
insert/upsert
Sonntag, 22. August 2010

75.
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

76.
doc = @db['quotes'].find_one(id)
doc[:from] = "Yogi Berra, famous baseball player"
@db['quotes'].save(doc)
Sonntag, 22. August 2010

77.
atomic updates
Sonntag, 22. August 2010

78.
@db['quotes'].update(
{"from" => "Yogi Berra"},
{"$inc" => {"reads" => 1 } }
)
Sonntag, 22. August 2010

79.
@db['quotes'].update(
{"from" => "Yogi Berra"},
{"$inc" => {"reads" => 1 } }
)
Sonntag, 22. August 2010

80.
$inc $addToSet
$set $pop
$unset $pull
$push $pullAll
$pushAll $
Sonntag, 22. August 2010

81.
getting a whole collection
Sonntag, 22. August 2010

82.
@db['quotes'].find.each do |row|
puts row.inspect
end
Sonntag, 22. August 2010

83.
exact query
Sonntag, 22. August 2010

84.
@db['quotes'].find(:from => "Yogi Berra")
Sonntag, 22. August 2010

85.
more queries
Sonntag, 22. August 2010

86.
100.times do |i|
db['numbers'].insert({"i" => i})
end
Sonntag, 22. August 2010

87.
db['numbers'].find("i" => {"$lt" => 2})
Sonntag, 22. August 2010

88.
$lt <
$gt >
$lte <=
$gte >=
$ne !=
Sonntag, 22. August 2010

89.
@db['people'].find(:tags => {"$in" => ['cool']})
Sonntag, 22. August 2010

90.
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

91.
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

92.
$in IN (2,3,4)
$nin NOT IN
$all [2,3] ~ [1,2,3]
Sonntag, 22. August 2010

93.
$mod yah, RLY
$size okay
$exists NOT NULL
$type huh?
Sonntag, 22. August 2010

94.
@db['people'].find("address.city" => /haven/)
Sonntag, 22. August 2010

95.
@db['people'].find("address.city" => /haven/)
Sonntag, 22. August 2010

96.
Sorting
Sonntag, 22. August 2010

97.
@db['people'].find().sort("address.street")
Sonntag, 22. August 2010

98.
@db['people'].find().sort("address.street")
Sonntag, 22. August 2010

99.
Pagination
Sonntag, 22. August 2010

100.
@db['numbers'].find.sort("i").limit(10)
Sonntag, 22. August 2010

101.
@db['numbers'].find.sort("i").limit(10).skip(50)
Sonntag, 22. August 2010

102.
Counting
Sonntag, 22. August 2010

103.
@db['numbers'].find.count
Sonntag, 22. August 2010

104.
Distinct
Sonntag, 22. August 2010

105.
@db['people'].distinct('tags').inspect
Sonntag, 22. August 2010

106.
Group
Sonntag, 22. August 2010

107.
Poor mans map/reduce
Sonntag, 22. August 2010

108.
Map / Reduce
Sonntag, 22. August 2010

109.
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

110.
Indexes
Sonntag, 22. August 2010

111.
db['people'].create_index("tags")
db['people'].drop_index("tags_1")
db['people'].index_information
Sonntag, 22. August 2010

112.
GridFS usage
Sonntag, 22. August 2010

113.
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

114.
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

115.
Capped collections
Sonntag, 22. August 2010

116.
@db.create_collection('capped_numbers',
:capped => true,
:max => 50
)
@db.create_collection('capped_numbers',
:capped => true,
:size => 1024 * 64
)
Sonntag, 22. August 2010

117.
ODMs
Sonntag, 22. August 2010

118.
mongo_mapper
Sonntag, 22. August 2010

119.
John Nunemaker
@jnunemaker
Sonntag, 22. August 2010

120.
is in production
Sonntag, 22. August 2010

121.
documentation?
Sonntag, 22. August 2010

122.
Sonntag, 22. August 2010

123.
how to
Sonntag, 22. August 2010

124.
rails initializer
Sonntag, 22. August 2010

125.
# 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

126.
a simple example
Sonntag, 22. August 2010

127.
MongoMapper.connection = @connection
MongoMapper.database = "test"
class Quote
include MongoMapper::Document
key :from
key :text
key :views, Integer
timestamps!
end
Sonntag, 22. August 2010

128.
finders
Sonntag, 22. August 2010

129.
Quote.where(:from => 'Yogi Berra').all
Quote.where(:from => 'Yogi Berra').limit(5).sort(:from.desc).all
Sonntag, 22. August 2010

130.
embedded docs
Sonntag, 22. August 2010

131.
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

132.
person = Person.first
address = Person.first.address
Sonntag, 22. August 2010

133.
scopes
Sonntag, 22. August 2010

134.
class Person
scope :tagged, lambda { |tag| where(:tags.in => [tag]) }
end
puts Person.tagged('cool').first.inspect
Sonntag, 22. August 2010

135.
new website coming soon
Sonntag, 22. August 2010

136.
mongoid
Sonntag, 22. August 2010

137.
Durran Jordan
(of Hashrocket)
Sonntag, 22. August 2010

138.
Two major versions
Sonntag, 22. August 2010

139.
1.x (1.9.x) targeting
Rails 2.3.x
Sonntag, 22. August 2010

140.
2.x (2.0beta) targeting
Rails 3.0
Sonntag, 22. August 2010

141.
Good documentation
Sonntag, 22. August 2010

142.
Sonntag, 22. August 2010

143.
rails initializer
Sonntag, 22. August 2010

144.
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

145.
a simple example
Sonntag, 22. August 2010

146.
class Quote
include Mongoid::Document
include Mongoid::Timestamps
field :from
field :text
field :views, :type => Integer
end
Sonntag, 22. August 2010

147.
finders
Sonntag, 22. August 2010

148.
Quote.where(:from => 'Yogi Berra').all
Quote.where(:from => 'Yogi Berra').limit(5).order_by(:from.desc).all
Sonntag, 22. August 2010

149.
embedded docs
Sonntag, 22. August 2010

150.
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

151.
person = Person.first
address = Person.first.address
Sonntag, 22. August 2010

152.
scopes
Sonntag, 22. August 2010

153.
class Person
scope :tagged, lambda { |tag| where(:tags.in => [tag]) }
end
puts Person.tagged('cool').first.inspect
Sonntag, 22. August 2010

154.
More features
Sonntag, 22. August 2010

155.
atomic updates
Sonntag, 22. August 2010

156.
mongoid tries to be
clever
Sonntag, 22. August 2010

157.
(using the „dirty“ flags)
Sonntag, 22. August 2010

158.
(it‘s probably better to
bypass the ODM
sometimes)
Sonntag, 22. August 2010

159.
GridFS
Sonntag, 22. August 2010

160.
external libraries for
both
Sonntag, 22. August 2010

161.
mongo_mapper > grip
Sonntag, 22. August 2010

162.
mongoid > mongoid_grid
Sonntag, 22. August 2010

163.
Other noteworthy
libraries
Sonntag, 22. August 2010

164.
Candy
Sonntag, 22. August 2010

165.
Candy
Sonntag, 22. August 2010

166.
mongodoc
http://github.com/leshill/mongodoc
Sonntag, 22. August 2010

167.
mongo-record
http://github.com/mongodb/mongo-record
Sonntag, 22. August 2010

168.
mongomodel
http://github.com/spohlenz/mongomodel
Sonntag, 22. August 2010

169.
mongo_queue
http://github.com/Skiz/mongo_queue
Sonntag, 22. August 2010

170.
resque-mongo
http://github.com/ctrochalakis/resque-mongo
Sonntag, 22. August 2010

171.
my account
Sonntag, 22. August 2010

172.
Installation was easy
Sonntag, 22. August 2010

173.
(when on right platform)
Sonntag, 22. August 2010

174.
setting up replication
Sonntag, 22. August 2010

175.
$ mongod --master
or
master = true # mongodb.conf
$ mongod --slave --source
slaveserver.example.com
slave = true
source = slaveserver.example.com
Sonntag, 22. August 2010

176.
(see example on github)
Sonntag, 22. August 2010

177.
OpLog size!
Sonntag, 22. August 2010

178.
„security“
Sonntag, 22. August 2010

179.
memory usage?
Sonntag, 22. August 2010

180.
limits?
Sonntag, 22. August 2010

181.
stability?
Sonntag, 22. August 2010

182.
I
Sonntag, 22. August 2010

183.
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