A library for persisting your objects into cassandra.
Cassandra Object provides a nice API for working with Cassandra. CassandraObjects are mostly duck-type compatible with ActiveRecord objects so most of your controller code should work ok. Note that they're mostly compatible, Cassandra has no support for dynamic queries, or sorting. So the following kinds of operations aren't supported and never will be.
There isn't much in the way of documentation yet, but a few examples.
class Customer < CassandraObject::Base attribute :first_name, :type => :string attribute :last_name, :type => :string attribute :date_of_birth, :type => :date attribute :signed_up_at, :type => :time_with_zone
validate :should_be_cool key :uuid index :date_of_birth association :invoices, :unique=>false, :inverse_of=>:customer private def should_be_cool unless ["Michael", "Anika", "Evan", "James"].include?(first_name) errors.add(:first_name, "must be that of a cool person") end end end class Invoice < CassandraObject::Base attribute :number, :type=>:integer attribute :total, :type=>:float attribute :gst_number, :type=>:string # indexes can have a single entry also. index :number, :unique=>true # bi-directional associations with read-repair support. association :customer, :unique=>true, :inverse_of=>:invoices # Read migration support migrate 1 do |attrs| attrs["total"] ||= rand(2000) / 100.0 end migrate 2 do |attrs| attrs["gst_number"] = "66-666-666" end key :natural, :attributes => :number end @invoice = Invoice.get("12345") @invoice.customer.invoices.all.include?(@invoice) # true
Here are some basic directions:
git clone git://github.com/NZKoz/cassandra_object.git
This gem has backwards compatibility with active support version 2.3.x, this is to enable people to use it with rails 2.3 applications. This backwards compatibility may not continue after the 1.0 release.
Only if you're looking to help out with the development, there are a bunch of rough edges right now.