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

class TheatreCommentsController < ApplicationController
  def index
    no_gt = params[:no_gt].to_i
    no_gt = 0 if no_gt.negative?

    comments = TheatreComment
               .where(theatre_id: params[:theatre_id])
               .where('no > ?', no_gt)
               .order(:no)

    render json: comments.as_json(include: { user: { only: [:id, :name] } })
  end

  def create
    return head :unauthorized unless current_user

    content = params[:content]
    return head :unprocessable_entity if content.blank?

    theatre = Theatre.find_by(id: params[:theatre_id])
    return head :not_found unless theatre

    comment = nil
    theatre.with_lock do
      no = theatre.next_comment_no
      comment = TheatreComment.create!(theatre:, no:, user: current_user, content:)
      theatre.update!(next_comment_no: no + 1)
    end

    render json: comment, status: :created
  end
end