Rails6.0 | 民泊サイトの構築（改良版）| 31 |予約フォームの実装 | for MacOSX

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「app\controllers\rooms_controller.rb」ファイルを編集します。


１．記述追加　app\controllers\rooms_controller.rb(71行目)

  # 予約 開始日のAJAX
  def preload
    today = Date.today
    reservations = @room.reservations.where("start_date >= ? OR end_date >= ?", today, today)

    render json: reservations
  end

  #　予約 終了日のAJAX
  def preview
    start_date = Date.parse(params[:start_date])
    end_date = Date.parse(params[:end_date])

    output = {
      conflict: is_conflict(start_date, end_date, @room)
    }

    render json: output
  end

２．記述追加　app\controllers\rooms_controller.rb(105行目)

    # 予約　プライベートメソッド
    def is_conflict(start_date, end_date, room)
      check = room.reservations.where("? < start_date AND end_date < ?", start_date, end_date)
      check.size > 0? true : false
    end

app\controllers\rooms_controller.rb

class RoomsController < ApplicationController

  protect_from_forgery except: [:upload_photo]
  before_action :set_room, except: [:index, :new, :create]
  before_action :authenticate_user!, except: [:show]
  before_action :is_authorised, only: [:listing, :pricing, :description, :photo_upload, :amenities, :location, :update]

  def index
     @rooms = current_user.rooms
  end

  def new
    @room = current_user.rooms.build
  end

  def create
    @room = current_user.rooms.build(room_params)
    if @room.save
      redirect_to listing_room_path(@room), notice: "保存しました。"
    else
      flash[:alert] = "問題が発生しました。"
      render :new
    end
  end

  def show
    @photos = @room.photos
  end

  def listing
  end

  def pricing
  end

  def description
  end

  def photo_upload
  end

  def amenities
  end

  def location
  end

  def update
    new_params = room_params
    new_params = room_params.merge(active: true) if is_ready_room

    if @room.update(new_params)
      flash[:notice] = "保存しました。"
    else
      flash[:alert] = "問題が発生しました。"
    end
    redirect_back(fallback_location: request.referer)
  end

  def upload_photo
    @room.photos.attach(params[:file])
    render json: { success: true }
  end

  def delete_photo
    @image = ActiveStorage::Attachment.find(params[:photo_id])
    @image.purge
    redirect_to photo_upload_room_path(@room)
  end

  # 予約 開始日のAJAX
  def preload
    today = Date.today
    reservations = @room.reservations.where("start_date >= ? OR end_date >= ?", today, today)
    render json: reservations
  end
  #　予約 終了日のAJAX
  def preview
    start_date = Date.parse(params[:start_date])
    end_date = Date.parse(params[:end_date])
    output = {
      conflict: is_conflict(start_date, end_date, @room)
    }
    render json: output
  end

  private

    def set_room
      @room = Room.find(params[:id])
    end
    
    def room_params
      params.require(:room).permit(:home_type, :room_type, :accommodate, :bed_room, :bath_room, :listing_name, :summary, :address, :is_tv, :is_kitchen, :is_air, :is_heating, :is_internet, :price, :active, :description)
    end

    def is_authorised
      redirect_to root_path, alert: "権限がありません。" unless current_user.id == @room.user_id
    end

    def is_ready_room
      !@room.active && !@room.price.blank? && !@room.listing_name.blank? && !@room.photos.blank? && !@room.address.blank?
    end

    # 予約　プライベートメソッド
    def is_conflict(start_date, end_date, room)
      check = room.reservations.where("? < start_date AND end_date < ?", start_date, end_date)
      check.size > 0? true : false
    end

  end

記述追加　config\routes.rb
「get 'preload'」の記述追加（25行目）と「get 'preview'」の記述追加（26行目）

Rails.application.routes.draw do

  # ルートを　app\views\pages\home.html.erb　に設定
  root 'pages#home'

  devise_for :users, 
              path: '', 
              path_names: {sign_up: 'register', sign_in: 'login', edit: 'profile', sign_out: 'logout'},
              controllers: {registrations: 'registrations'}

  get 'pages/home'
  get '/dashboard', to: 'users#dashboard'
  get '/users/:id', to: 'users#show', as: 'user'
  
  post '/users/edit', to: 'users#update'

  resources :rooms, except: [:edit] do
    member do
      get 'listing'
      get 'pricing'
      get 'description'
      get 'photo_upload'
      get 'amenities'
      get 'location'
      get 'preload'
      get 'preview'
      delete :delete_photo
      post :upload_photo
    end
    resources :reservations, only: [:create]
  end

  # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
end

記述更新　app\views\reservations\_form.html.erb
コードをコピーして内容を置き換えてください。

<%= form_for([@room, @room.reservations.new]) do |f| %>
  <div class="card" style="width: 24rem; margin-left: -70px;">
  <div class="card-header bg-dark">
  <span class="badge bg-warning" style="font-size: 1.2rem; position: relative; top: 0.1rem;">1泊 <%= number_to_currency(@room.price) %></span>
  <% if (!user_signed_in?) %>
  <h3 class="badge bg-danger" style="color: white;font-size: 0.8rem; position: relative; top: 0.8rem; left: 1rem;">ログインすると予約ができます</h3>
  <% end %>
  </div>
  <div class="card-body">
  <form>
  <div class="form-row">
    <div class="col">
      <%= f.text_field :start_date, readonly: true, placeholder: "チェックイン", class: "form-control" %>
    </div>
    <div class="col">
    <%= f.text_field :end_date, readonly: true, placeholder: "チェックアウト", class: "form-control" %>
    </div>
  </div>
</form>
<h4 class="message-alert text-center"><span id="message"></span></h4>
<div id="preview" style="display: none">
  <table class="reservation-table">
    <tbody>
        <tr>
          <td>宿泊費用</td>
          <td class="text-right", style="white-space: nowrap"><%= number_to_currency(@room.price) %></td>
        </tr>
        <tr>
          <td>宿泊日数</td>
          <td class="text-right"><span id="reservation_nights"></span>泊</td>
        </tr>
        <tr>
          <td class="total">合計金額</td>
          <td class="text-right", style="white-space: nowrap"><span id="reservation_total"></span>円</td>
        </tr>
      </tbody>
  </table>
</div>  
  <br/>
    <%= f.submit "予約する", id: "btn_book", class: "btn btn-danger btn-block", disabled: true %>
  </div>
</div>
<% end %>
<script>
function checkDate(date) {
  dmy = date.getDate() + "-" + (date.getMonth() + 1) + "-" + date.getFullYear();
  return [$.inArray(dmy, unavailableDates) == -1];
}
$(function() {
  unavailableDates = [];
  $.ajax({
    url: '<%= preload_room_path(@room) %>',
    dateTyp: 'json',
    success: function(data) {
      $.each(data, function(arrID, arrValue) {
          for(var d = new Date(arrValue.start_date); d <= new Date(arrValue.end_date); d.setDate(d.getDate() + 1)) {
            unavailableDates.push($.datepicker.formatDate('d-m-yy', d));
          }
      });
      $('#reservation_start_date').datepicker({
        dateFormat: 'dd-mm-yy',
        //今日から３ヶ月先まで予約可能
        minDate: 0,
        maxDate: '3m',
        beforeShowDay: checkDate,
        onSelect: function(selected) {
          $('#reservation_end_date').datepicker("option", "minDate", selected);
          $('#reservation_end_date').attr("disabled", false);
          var start_date = $('#reservation_start_date').datepicker('getDate');
          var end_date = $('#reservation_end_date').datepicker('getDate');
          //２日選択すると１泊になる
          var nights = (end_date - start_date)/1000/60/60/24;
          var input = {
            'start_date': start_date,
            'end_date': end_date
          }
          $.ajax({
            url: '<%= preview_room_path(@room) %>',
            data: input,
            success: function(data) {
              if(data.conflict) {
                $('#message').text("この日付はご利用できません。");
                $('#preview').hide();
                $('#btn_book').attr('disabled', true);
              } else {
                $('#message').text("");
                $('#preview').show();
                $('#btn_book').attr('disabled', false);
                var total = nights * <%= @room.price %>
                $('#reservation_nights').text(nights);
                $('#reservation_total').text(total);
              }
            }
          });
        }
      });
      $('#reservation_end_date').datepicker({
        dateFormat: 'dd-mm-yy',
        //今日から３ヶ月先まで予約可能
        minDate: 0,
        maxDate: '3m',
        beforeShowDay: checkDate,
        onSelect: function(selected) {
          $('#reservation_start_date').datepicker("option", "maxDate", selected);
          var start_date = $('#reservation_start_date').datepicker('getDate');
          var end_date = $('#reservation_end_date').datepicker('getDate');
          var nights = (end_date - start_date)/1000/60/60/24;
          var input = {
            'start_date': start_date,
            'end_date': end_date
          }
          $.ajax({
            url: '<%= preview_room_path(@room) %>',
            data: input,
            success: function(data) {
              if(data.conflict) {
                $('#message').text("この日付ではご予約できません。");
                $('#preview').hide();
                $('#btn_book').attr('disabled', true);
              } else {
                $('#message').text("");
                $('#preview').show();
                $('#btn_book').attr('disabled', false);
                var total = nights * <%= @room.price %>
                $('#reservation_nights').text(nights);
                $('#reservation_total').text(total);
              }
            }
          });
        }
      });
    }
  });
});
</script>

ブラウザ確認
ログインしないと予約カレンダーが出ないようになっています。
実際に予約できるか確認してください。
http://localhost:3000/rooms/1

予約確認

↓↓クリックして頂けると励みになります。

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