btrc-hub/backend/app/controllers/theatre_programmes_controller.rb

class TheatreProgrammesController < ApplicationController
  def index
    limit = params[:limit].to_i
    limit = 100 if limit <= 0

    position_gt = params[:position_gt].to_i
    position_gt = 0 if position_gt < 0

    programmes = TheatreProgramme
                 .where(theatre_id: params[:theatre_id])
                 .where('position > ?', position_gt)
                 .order(position: :desc).limit(100)
                 .limit(limit)

    render json: programmes.as_json(include: { post: PostRepr::BASE })
  end
end