//ROUTES DON'T FORGET TO DO RAKE ROUTES BEFORE RELOADING!
    post 'participants/GetParticipant' => 'participants#GetParticipant'

//CONTROLLER
//PUT THAT LINE JUST AFTER YOUR BEFORE ACTION
    skip_before_action :verify_authenticity_token,only: [:GetParticipant]
//THEN DO YOUR FUNCTION
  def GetParticipant
    participant = Participant.last
    puts participant.to_s
    render :json => {data:participant}
  end

//JAVASCRIPT OF YOUR GAME
    function GetParticipant(){
       $.ajax({
        url: "/participants/GetParticipant",
        type: 'post',
        complete: function(data){
          console.log(data);
        }
      });
    }