RDDB面向文档的数据库

RDDB 是一个 Ruby 开发的面向文档的数据库系统，其灵感来自 CouchDB。

示例代码：

  # First create an database object
  database = Rddb::Database.new

  # Put some documents into it
  database << {:name => 'John', :income => 35000}
  database << {:name => 'Bob', :income => 40000}
  database << {:name => 'Jim', :income => 37000}

  # Create a view that will return the names
  database.create_view('names') do |document, args|
    document.name
  end

  # The result of querying will return an array of names
  assert_equal ['John','Bob','Jim'], database.query('names')