在Rails 3.1中处理时间段

本文介绍了在Rails 3.1中处理时间段的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在开发Rails 3.1中的预订系统.我已经为预订创建了一个模型:

I'm developing a booking system in Rails 3.1. I have created a model for a Booking:

# == Schema Information # # Table name: bookings # # id :integer not null, primary key # product_id :integer # customer_id :integer # booked_from :datetime # booked_to :datetime # paid :boolean # payment_type :string(255) # created_at :datetime # updated_at :datetime #

所以我要做的是验证每个条目，并检查所需的时间段(booked_from-booked_to)是否与另一个具有相同product_id的预订的任何时间段重叠.这些产品还具有一个available_from和available_to字段，还必须对其进行验证.

So what I want to do is to validate each entry and check whether the desired time period (booked_from - booked_to) is overlapping any period of another booking with the same product_id. The products also have an available_from and available_to field which it also has to validate against.

我该怎么做?

推荐答案

检查是否可行:

class Booking validate :booking_period_not_overlapped private def booking_period_not_overlapped unless Booking.where( '(booked_from <= ? AND booked_to >= ?) OR (booked_from >= ? AND booked_from <= ?)', booked_from, booked_from, booked_from, booked_to ).empty? errors.add(:booked_from, 'Invalid period.') end end end

它只是检查是否有任何现有记录的booked_from和booked__满足以下条件之一(假设您的新预订时间为16:00至17:00):

It just checks if there is any existing records whose booked_from and booked_to satisfy one of the following conditions (suppose your new booking is from 16:00 to 17:00):

开始于新预订之前，但尚未结束(例如15:00-16:30或15:00-17:30)

它在新的预订期限内开始(例如16:20-16:50或16:30-17:30)