class TblA < ActiveRecord::Base
has_many :bs, :class_name => "TblB", :foreign_key => "name"
end

class TblB < ActiveRecord::Base
belongs_to :a, :class_name => "TblA", :foreign_key => "name"
end

ret = TblA.find
ret.bs.each do |b|
puts b.fuge
end