Question

我有两个模型，服务和约会。服务可以有很多约会。

我有一个嵌套表单供用户预约。

如何自动计算约会的结束时间？可以理解的是，我宁愿不依赖用户根据他们选择的服务长度输入结束时间。

目前我的控制器看起来像这样......

class AppointmentsController < ApplicationController
  before_action :set_appointment, only: [:show, :edit, :update, :destroy]
  before_action :load_services, only: [:new, :edit]
  after_filter :end_calculate, only: [:create, :update]

  [...]

  # POST /appointments
  # POST /appointments.json
  def create
    @appointment = Appointment.new(appointment_params)

    respond_to do |format|
      if @appointment.save
       # redirect_to root_url
        format.html { redirect_to @appointment, notice: 'Appointment was successfully created.' }
        format.json { render :show, status: :created, location: @appointment }
      else
        format.html { render :new }
        format.json { render json: @appointment.errors, status: :unprocessable_entity }
      end
    end
  end

  # PATCH/PUT /appointments/1
  # PATCH/PUT /appointments/1.json
  def update
    respond_to do |format|
      if @appointment.update(appointment_params)
        format.html { redirect_to @appointment, notice: 'Appointment was successfully updated.' }
        format.json { render :show, status: :ok, location: @appointment }
      else
        format.html { render :edit }
        format.json { render json: @appointment.errors, status: :unprocessable_entity }
      end
    end
  end

  [...]

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_appointment
      @appointment = Appointment.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def appointment_params
      params.require(:appointment).permit(:start_time, :end_time, :note, :service_id)
    end

    def load_services
      @services = Service.all.collect {|service| [ service.title, service.length, service.id] }
    end

    def end_calculate
      @appointment.end_time = @appointment.start_time + @service.length.minutes
      @appointment.end_time.save
    end

end

Answer 1

因此，在讨论之后，解决方案是从控制器中删除end_calculate方法，并将end_time方法添加到Appointment类：

  def end_time
    end_time = self.start_time + self.service.length.minutes
  end

当我知道服务的长度时，我如何计算约会的结束时间？

1 个答案: