gistfile1.rb

require 'dm-core'
require 'dm-aggregates'

DataMapper::Logger.new(STDOUT, :debug)
DataMapper.setup(:default, "mysql://localhost/dm_specs")

class CrawledPage
  include DataMapper::Resource
  property :id, Serial
  belongs_to :crawling_run
end

class CrawlingRun
  include DataMapper::Resource
  property :id, Serial
  belongs_to :board_account
  has n, :crawled_pages
end

class BoardAccount
  include DataMapper::Resource
  property :id, Serial
  belongs_to :board
  belongs_to :recruiter, :nullable => true
  has n, :crawling_runs
end

class Recruiter
  include DataMapper::Resource
  property :id, Serial
  has n, :board_accounts
end

DataMapper.auto_migrate!
CrawledPage.count('crawling_run.board_account.board_id' => 'board1') # pulled from email and explodes
CrawledPage.count('crawling_run.board_account.recruiter.id' => 'board1') # works
CrawledPage.count('crawling_run.board_account.id' => 'board1')