Flask爱家租房--订单（下订单）

文章目录

- 0 、效果展示
- 1、思路总结
- 2、后端代码
- 3、前端js
- 4、前端html

0 、效果展示

detail.html
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booking.html

1、思路总结

1）用户打开房屋详情页detail.html之后，后端detail.js会判断此访问用户是否为房东，若不是房东，则在详情页的最下方展示“即刻预定”按钮，用户点击后，页面会根据js文件指定的路径，转到/booking.html页面；
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2）接下来页面/booking.html开始加载，booking.js会对：用户是否已经登录、选定开始结束日期的前后关系、是否完整等进行逻辑判断，同时通过定义函数，截取url中的house_id，通过house_id获得房屋的基本信息，加载到前端页面；
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3）用户填写相关信息，点击“提交订单按钮”，向后端路径/api/v1.0/orders发送ajax请求；

4）接下来，后端相应接口save_order()进行逻辑处理，

保存订单信息，提交数据库，并向前端返回order.id。

2、后端代码

orders.py

@api.route("/orders", methods=["POST"])
@login_required
def save_order():"""保存订单"""user_id = g.user_id# 获取参数order_data = request.get_json()if not order_data:return jsonify(errno=RET.PARAMERR, errmsg="参数错误")house_id = order_data.get("house_id")  # 预订的房屋编号start_date_str = order_data.get("start_date")  # 预订的起始时间end_date_str = order_data.get("end_date")  # 预订的结束时间# 参数检查if not all((house_id, start_date_str, end_date_str)):return jsonify(errno=RET.PARAMERR, errmsg="参数错误")# 日期格式检查try:# 将请求的时间参数字符串转换为datetime类型start_date = datetime.datetime.strptime(start_date_str, "%Y-%m-%d")end_date = datetime.datetime.strptime(end_date_str, "%Y-%m-%d")assert start_date <= end_date# 计算预订的天数days = (end_date - start_date).days + 1  # datetime.timedeltaexcept Exception as e:current_app.logger.error(e)return jsonify(errno=RET.PARAMERR, errmsg="日期格式错误")# 查询房屋是否存在try:house = House.query.get(house_id)except Exception as e:current_app.logger.error(e)return jsonify(errno=RET.DBERR, errmsg="获取房屋信息失败")if not house:return jsonify(errno=RET.NODATA, errmsg="房屋不存在")# 预订的房屋是否是房东自己的if user_id == house.user_id:return jsonify(errno=RET.ROLEERR, errmsg="不能预订自己的房屋")# 2，房屋没有被别人下单try:# 查询时间冲突的订单数count = Order.query.filter(Order.house_id == house_id, Order.begin_date <= end_date,Order.end_date >= start_date).count()#  select count(*) from order where ....except Exception as e:current_app.logger.error(e)return jsonify(errno=RET.DBERR, errmsg="检查出错，请稍候重试")if count > 0:return jsonify(errno=RET.DATAERR, errmsg="房屋已被预订")# 订单总额amount = days * house.price# 保存订单数据order = Order(house_id=house_id,user_id=user_id,begin_date=start_date,end_date=end_date,days=days,house_price=house.price,amount=amount)try:db.session.add(order)db.session.commit()except Exception as e:current_app.logger.error(e)db.session.rollback()return jsonify(errno=RET.DBERR, errmsg="保存订单失败")return jsonify(errno=RET.OK, errmsg="OK", data={"order_id": order.id})

3、前端js

booking.js

function hrefBack() {history.go(-1);
}function getCookie(name) {var r = document.cookie.match("\\b" + name + "=([^;]*)\\b");return r ? r[1] : undefined;
}function decodeQuery(){var search = decodeURI(document.location.search);return search.replace(/(^\?)/, '').split('&').reduce(function(result, item){values = item.split('=');result[values[0]] = values[1];return result;}, {});
}function showErrorMsg() {$('.popup_con').fadeIn('fast', function() {setTimeout(function(){$('.popup_con').fadeOut('fast',function(){}); },1000) });
}$(document).ready(function(){// 判断用户是否登录$.get("/api/v1.0/session", function(resp) {if ("0" != resp.errno) {location.href = "/login.html";}}, "json");$(".input-daterange").datepicker({format: "yyyy-mm-dd",startDate: "today",language: "zh-CN",autoclose: true});$(".input-daterange").on("changeDate", function(){var startDate = $("#start-date").val();var endDate = $("#end-date").val();if (startDate && endDate && startDate > endDate) {showErrorMsg("日期有误，请重新选择!");} else {var sd = new Date(startDate);var ed = new Date(endDate);days = (ed - sd)/(1000*3600*24) + 1;var price = $(".house-text>p>span").html();var amount = days * parseFloat(price);$(".order-amount>span").html(amount.toFixed(2) + "(共"+ days +"晚)");}});var queryData = decodeQuery();var houseId = queryData["hid"];// 获取房屋的基本信息$.get("/api/v1.0/houses/" + houseId, function(resp){if (0 == resp.errno) {$(".house-info>img").attr("src", resp.data.house.img_urls[0]);$(".house-text>h3").html(resp.data.house.title);$(".house-text>p>span").html((resp.data.house.price/100.0).toFixed(0));}});// 订单提交$(".submit-btn").on("click", function(e) {if ($(".order-amount>span").html()) {$(this).prop("disabled", true);var startDate = $("#start-date").val();var endDate = $("#end-date").val();var data = {"house_id":houseId,"start_date":startDate,"end_date":endDate};$.ajax({url:"/api/v1.0/orders",type:"POST",data: JSON.stringify(data),contentType: "application/json",dataType: "json",headers:{"X-CSRFTOKEN":getCookie("csrf_token"),},success: function (resp) {if ("4101" == resp.errno) {location.href = "/login.html";} else if ("4004" == resp.errno) {showErrorMsg("房间已被抢定，请重新选择日期！");} else if ("0" == resp.errno) {location.href = "/orders.html";}}});}});
})

4、前端html

booking.html

<!DOCTYPE html>
<html>
<head> <meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no"><title>爱家-预订</title><link href="/static/plugins/bootstrap/css/bootstrap.min.css" rel="stylesheet"><link href="/static/plugins/font-awesome/css/font-awesome.min.css" rel="stylesheet"><link href="/static/css/reset.css" rel="stylesheet"><link href="/static/plugins/bootstrap-datepicker/css/bootstrap-datepicker.min.css" rel="stylesheet"><link href="/static/css/ihome/main.css" rel="stylesheet"><link href="/static/css/ihome/booking.css" rel="stylesheet">
</head>
<body><div class="container"><div class="top-bar"><div class="nav-bar"><h3 class="page-title">预 订</h3><a class="nav-btn fl" href="#" onclick="hrefBack();"><span><i class="fa fa-angle-left fa-2x"></i></span></a></div></div><div class="house-info"><img src="/static/images/home01.jpg"><div class="house-text"><h3>房屋标题</h3><p>￥<span>300</span>/晚</p></div></div><div class="select-date"><div class="select-date-header">入住时间</div><div class="input-daterange input-group"><input type="text" class="input-sm form-control" id="start-date" /><span class="input-group-addon">至</span><input type="text" class="input-sm form-control" id="end-date" /></div></div><div class="submit-order"><span class="order-amount">订单总额：￥<span></span></span><span class="submit-btn">提交订单</span></div></div><div class="popup_con"><div class="popup"><p>日期有误，请重新选择！</p></div><div class="mask"></div></div><script src="/static/js/jquery.min.js"></script><script src="/static/plugins/bootstrap/js/bootstrap.min.js"></script><script src="/static/plugins/bootstrap-datepicker/js/bootstrap-datepicker.min.js"></script><script src="/static/plugins/bootstrap-datepicker/locales/bootstrap-datepicker.zh-CN.min.js"></script><script src="/static/js/ihome/booking.js"></script>
</body>
</html>