app/models/tracepoint.rb

   1 class Tracepoint < ActiveRecord::Base
   2   set_table_name 'gps_points'
   3
   4 #  validates_numericality_of :latitude
   5 #  validates_numericality_of :longitude
   6
   7   belongs_to :user
   8   belongs_to :trace, :foreign_key => 'gpx_id'
   9 end