Copyright © 2010 SUGAWARA Genki <[email protected]>
activerecord-cassandra-adapter is a Cassandra adapter for ActiveRecord.
activerecord-cassandra-adapter depend on Cassandra Ruby Driver.
see rubygems.org/gems/cassandra
bitbucket.org/winebarrel/activerecord-cassandra-adapter
gem install activerecord-cassandra-adapter
development: adapter: cassandra host: 127.0.0.1 port: 9160 keyspace: employees
class Employee < ActiveRecord::Base include ActiveCassandra::CF # identifier lambda { Time.now.tv_sec } end
# see http://api.rubyonrails.org/classes/ActiveRecord/Base.html emp = Emp.find(:first, :conditions => ["job = ? and sal >= ?", "MANAGER", 2800], :limit => 3, :offset => 1) p emp.id #=> "a198f990-719d-11df-974a-37650c93e624" emp.age = 30 emp.save emp_list = Emp.find(:all, :conditions => {:empno => [7654, 7698, 7782]}) emp_list.each do |i| i.destroy if i.sal < 2000 end new_emp = Emp.new new_emp.empno = 8000 new_emp.ename = 'YAMADA' new_emp.age = 27 new_emp.save! # not available: JOIN, ORDER, OR and etc... # see http://github.com/winebarrel/activerecord-cassandra-adapter/blob/master/lib/active_cassandra/sqlparser.y
Emp.cassandra_client do |client| ... end