# sometimes datamapper's association eager loading is too eager
# with 0.10.2

class A
  include DataMapper::Resource
  property :id, Serial

  has n, :bs, :order => :created_at.desc
  has 1, :latest_b, 'B', :order => :created_at.desc
end

class B
  include DataMapper::Resource
  property :id, Serial
  property :created_at, DateTime
end

@as.each do |a|
  puts a.bs.first
end


#runs select <*> from bs where a_id in (<ids of each a in @as>)

#also,
@as.each do |a|
  puts a.latest_b
end
#runs select <*> from bs where a_id in (<ids of each a in @as>) order by created_at desc

#workaround
@as.each do |a|
  puts B.first :a => a, :order => created_at.desc
end