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![doc = @db['quotes'].find_one(id)
doc[:from] = "Yogi Berra, famous baseball player"
@db['...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-76-2048.jpg?cb=1668268791)
![@db['quotes'].update(
{"from" => "Yogi Berra"},
{"$inc" => {"reads" => 1 } }
...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-78-2048.jpg?cb=1668268791)
![@db['quotes'].update(
{"from" => "Yogi Berra"},
{"$inc" => {"reads" => 1 } }
...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-79-2048.jpg?cb=1668268791)
![@db['quotes'].find.each do |row|
puts row.inspect
end
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-82-2048.jpg?cb=1668268791)
![@db['quotes'].find(:from => "Yogi Berra")
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-84-2048.jpg?cb=1668268791)
![100.times do |i|
db['numbers'].insert({"i" => i})
end
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-86-2048.jpg?cb=1668268791)
![db['numbers'].find("i" => {"$lt" => 2})
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-87-2048.jpg?cb=1668268791)
![@db['people'].find(:tags => {"$in" => ['cool']})
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-89-2048.jpg?cb=1668268791)
![$in IN (2,3,4)
$nin NOT IN
$all [2,3] ~ [1,2,3]
Sonntag, 22. August 2...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-92-2048.jpg?cb=1668268791)
![@db['people'].find("address.city" => /haven/)
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-94-2048.jpg?cb=1668268791)
![@db['people'].find("address.city" => /haven/)
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-95-2048.jpg?cb=1668268791)
![@db['people'].find().sort("address.street")
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-97-2048.jpg?cb=1668268791)
![@db['people'].find().sort("address.street")
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-98-2048.jpg?cb=1668268791)
![@db['numbers'].find.sort("i").limit(10)
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-100-2048.jpg?cb=1668268791)
![@db['numbers'].find.sort("i").limit(10).skip(50)
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-101-2048.jpg?cb=1668268791)
![@db['numbers'].find.count
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-103-2048.jpg?cb=1668268791)
![@db['people'].distinct('tags').inspect
Sonntag, 22. August 2010](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-105-2048.jpg?cb=1668268791)
![db['people'].create_index("tags")
db['people'].drop_index("tags_1")
db['people'].index_i...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-111-2048.jpg?cb=1668268791)
![class Person
scope :tagged, lambda { |tag| where(:tags.in => [tag]) }
end
...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-134-2048.jpg?cb=1668268791)
![File.open(File.join(RAILS_ROOT, 'config/mongodb.yml'), 'r') do |f|
@settings = YAML.load(f)[RAILS_ENV]
...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-144-2048.jpg?cb=1668268791)
![class Person
scope :tagged, lambda { |tag| where(:tags.in => [tag]) }
end
...](https://image.slidesharecdn.com/mongodbfroscon2010-100822052336-phpapp02/75/Mongodb-on-Ruby-And-Rails-froscon-2010-153-2048.jpg?cb=1668268791)
