我正在使用grouped_select进行预订，其中可以根据空房情况选择房间。每次用户更改arrival和/或departure的值时，rooms（属于room_types）都会根据该时间段的可用性进行调整。>

当我尝试编辑预订时，如果我不调整到达或离开的日期，一切都会很好（例如，先前选择的room并因此将其room_type显示为默认）。

问题

当我更改arrrival或departure的日期时，我会重新输入可用的房间，并且先前选择的room（及其room_category）不见了如果该空间可供新选择的room和arrival日期使用，是否有办法将先前选择的departure显示为默认值？

代码

预订表格

<div class="col col-sm-4">
        <%= f.input :arrival,as: :string,label:false,placeholder: "From",wrapper_html: { class: "inline_field_wrapper" },input_html:{ id: "start_date"} %>
      </div>
      <div class="col col-sm-4">
        <%= f.input :departure,input_html:{ id: "end_date"} %>
      </div>

      <div class="col col-sm-4">
        <%= f.input :room_id,collection: @room_categories.order(:name),as: :grouped_select,group_method: :rooms,label:false %>
      </div>

JS

const checkIn = document.querySelector('#start_date');
const checkOut = document.querySelector('#end_date');


  const checkInAndOut = [checkIn,checkOut];

  checkInAndOut.forEach((item) => {
    item.addEventListener('change',(event) => {
      if ((checkIn.value.length > 0) && (checkOut.value.length > 0)){
      checkAvailability();
    }
  })
});

    function checkAvailability(){

      Rails.ajax({
        url: "<%= rooms_availability_hotel_path(@hotel) %>",dataType: 'json',type: "POST",data: `arrival=${start_date.value}&departure=${end_date.value}`,success: function(data) {
          console.log(data);
        },error: function(response) {
          console.log(response);
        }
      });
    };

控制器检查可用性

  def rooms_availability
    hotel = Hotel.includes(:rooms).find(params[:id])
    arrival = Date.parse(room_params[:arrival])
    departure = Date.parse(room_params[:departure])
    time_span = arrival..departure
    @unavailable_rooms = Room.joins(:reservations).where(reservations: {hotel: hotel}).where("reservations.arrival <= ? AND ? >= reservations.departure",arrival,departure).distinct + (Room.joins(:reservations).where(reservations: {hotel: hotel}).where("reservations.arrival <= ? AND ? <= reservations.departure",departure).distinct)
    @hotel_cats = hotel.room_categories
    @hotel_accos = Room.where(room_category: @hotel_cats)
    @rooms = @hotel_accos - @unavailable_rooms
    respond_to do |format|
      format.js
    end
  end