48 lines
1.2 KiB
Ruby
48 lines
1.2 KiB
Ruby
$LOAD_PATH[0,0] = File.join(File.dirname(__FILE__), '..', 'lib')
|
|
require 'mongo'
|
|
require 'pp'
|
|
|
|
include Mongo
|
|
|
|
host = ENV['MONGO_RUBY_DRIVER_HOST'] || 'localhost'
|
|
port = ENV['MONGO_RUBY_DRIVER_PORT'] || Connection::DEFAULT_PORT
|
|
|
|
puts "Connecting to #{host}:#{port}"
|
|
db = Connection.new(host, port).db('ruby-mongo-examples')
|
|
coll = db.collection('test')
|
|
|
|
# Erase all records from collection, if any
|
|
coll.clear
|
|
|
|
# Insert 3 records
|
|
3.times { |i| coll.insert({'a' => i+1}) }
|
|
|
|
# Cursors don't run their queries until you actually attempt to retrieve data
|
|
# from them.
|
|
|
|
# Find returns a Cursor, which is Enumerable. You can iterate:
|
|
coll.find().each { |row| pp row }
|
|
|
|
# You can turn it into an array
|
|
array = coll.find().to_a
|
|
|
|
# You can iterate after turning it into an array (the cursor will iterate over
|
|
# the copy of the array that it saves internally.)
|
|
cursor = coll.find()
|
|
array = cursor.to_a
|
|
cursor.each { |row| pp row }
|
|
|
|
# You can get the next object
|
|
first_object = coll.find().next_document
|
|
|
|
# next_document returns nil if there are no more objects that match
|
|
cursor = coll.find()
|
|
obj = cursor.next_document
|
|
while obj
|
|
pp obj
|
|
obj = cursor.next_document
|
|
end
|
|
|
|
# Destroy the collection
|
|
coll.drop
|