带有Mysql Master / Slave的Datamapper

DataMapper.setup(:default, \'mysql://master-host/mydb\')
DataMapper.setup(:slave, \'mysql://slave-host/mydb\')

DataMapper.repository(:slave) do
  Person.first
end

DataMapper.setup(:default, \'mysql://localhost/the_database_name\')

DataMapper.mysql(:host xxxx, :user xxxx, :password xxxx, :database xxxx)

class Post
  include DataMapper::Resource

  property :id,         Serial    # An auto-increment integer key
  property :title,      String    # A varchar type string, for short strings
  property :body,       Text      # A text block, for longer string data.
  property :created_at, DateTime  # A DateTime, for any date you might like.
end