Add files via upload

cart.py

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+# -*- coding:utf-8 -*-
+"""
+购物车模块
+"""
+from flask import Blueprint, render_template, abort, session, redirect, request
+from jinja2 import TemplateNotFound
+from flask_login import login_required,current_user
+from models import Cart,db 
+shopping_cart = Blueprint("cart", __name__, static_folder="static", template_folder="templates")
+
+
+@shopping_cart.route("/index")
+@login_required
+def index():
+    total = 0
+    books = Cart.query.filter_by(uid=current_user.id).all() #根据用户id查找购物车数据
+    for b  in books:
+        total = total + b.quantity * b.book.retail_price #遍历购物车计算总价
+    return render_template("cart.html", books=books ,total=total )
+
+
+@shopping_cart.route("/add/<isbn>")  
+@login_required
+def add_2_cart(isbn):
+    """
+    将物品编号是id的物品放入到用户购物车
+    :param id:
+    :return:
+    """
+    try:
+        cart_item = Cart.query.filter_by(uid=current_user.id , book_id=isbn).first() 
+        if cart_item is not None: #先判断该书是否已经加入购物车
+            cart_item.quantity += 1 #数量加1
+        else:
+            item = Cart(uid = current_user.id , book_id = isbn, quantity = 1)#不在购物车就新建一条记录
+            db.session.add(item)
+        db.session.commit()
+        return redirect('/cart/index')    
+    except TemplateNotFound:
+        abort(404)
+
+
+@shopping_cart.route("/<isbn>/remove")
+@login_required
+def remove_from_cart(isbn):
+    try:
+        Cart.query.filter_by(uid=current_user.id,book_id=isbn).delete() #根据isbn移除购物车的书
+        db.session.commit() #提交保存
+        return redirect("/cart/index")
+    except Exception as exception:
+        abort(500)
+
+@shopping_cart.route("/remove_all")
+def remove_all():
+    try:
+        Cart.query.filter_by(uid=current_user.id).delete() #删除该用户所有购物车数据
+        db.session.commit()#提交保存
+        return redirect("/cart/index")
+    except Exception as exception:
+        abort(500)
+
+@shopping_cart.route("/pay_check")
+@login_required
+def pay_check():
+    try:
+
+        res = []
+        total_money = 0  #图书总价 
+        tota_postage = 3 #邮费
+        not_enough = []  #库存不足的书
+        for item in Cart.query.filter_by(uid=current_user.id).all() : 
+            if item.quantity <= item.book.stock:#判断库存是否充足
+                tota_postage = tota_postage + item.quantity #邮费累加
+                total_money += item.quantity * item.book.retail_price  #图书总价累加
+                res.append(item)
+            else:
+                not_enough.append(item) #库存不足的书
+        if tota_postage > 4:#根据规则邮费调整
+            tota_postage = tota_postage - 2  
+        else:
+            tota_postage = 3
+        return  render_template("check.html",tota_postage=tota_postage,total_money=total_money,res=res,not_enough=not_enough)
+    except Exception as exception:
+        print(exception)
+        abort(500)
+
+
+@shopping_cart.route("/pay_now")
+@login_required
+def pay_now():
+    for item in Cart.query.filter_by(uid=current_user.id).all() : #遍历购物车
+        if item.quantity <= item.book.stock:#库存充足则扣减对应库存
+            item.book.stock-=item.quantity
+    Cart.query.filter_by(uid=current_user.id).delete() #删除所有购物车数据，这里把库存不足的也删了
+    db.session.commit() 
+    return render_template('payment.html')

data.sql

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+/*
+SQLyog v10.2 
+MySQL - 5.5.5-10.1.21-MariaDB : Database - bookmall
+*********************************************************************
+*/
+
+/*!40101 SET NAMES utf8 */;
+
+/*!40101 SET SQL_MODE=''*/;
+
+/*!40014 SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0 */;
+/*!40014 SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0 */;
+/*!40101 SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='NO_AUTO_VALUE_ON_ZERO' */;
+/*!40111 SET @OLD_SQL_NOTES=@@SQL_NOTES, SQL_NOTES=0 */;
+CREATE DATABASE /*!32312 IF NOT EXISTS*/`bookmall` /*!40100 DEFAULT CHARACTER SET utf8 */;
+
+/*Table structure for table `bookinfo` */
+
+CREATE TABLE `bookinfo` (
+  `isbn` varchar(13) NOT NULL,
+  `title` varchar(200) NOT NULL,
+  `author` text NOT NULL,
+  `img` text NOT NULL,
+  `stock` int(11) NOT NULL,
+  `trade_price` int(11) NOT NULL,
+  `retail_price` int(11) NOT NULL,
+  `pub_date` date NOT NULL,
+  `description` text NOT NULL,
+  PRIMARY KEY (`isbn`),
+  UNIQUE KEY `isbn` (`isbn`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+
+/*Data for the table `bookinfo` */
+
+insert  into `bookinfo`(`isbn`,`title`,`author`,`img`,`stock`,`trade_price`,`retail_price`,`pub_date`,`description`) values ('2015620065151','网址编辑','dsds','/static/img/5.jpg',77,33,41,'2021-11-04','dsdsdsds'),('2020613225326','books1','sasas','/static/img/1.jpg',10,12,14,'2021-11-03','hello word'),('2020613225327','test2','jak','/static/img/2.jpg',22,22,12,'2021-11-11','21212dscsacscasc sa');
+
+/*Table structure for table `cart` */
+
+CREATE TABLE `cart` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `uid` int(11) DEFAULT NULL,
+  `book_id` varchar(13) DEFAULT NULL,
+  `quantity` int(11) NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `id` (`id`),
+  KEY `uid` (`uid`),
+  KEY `book_id` (`book_id`),
+  CONSTRAINT `cart_ibfk_1` FOREIGN KEY (`uid`) REFERENCES `user` (`id`),
+  CONSTRAINT `cart_ibfk_2` FOREIGN KEY (`book_id`) REFERENCES `bookinfo` (`isbn`)
+) ENGINE=InnoDB AUTO_INCREMENT=15 DEFAULT CHARSET=utf8;
+
+/*Data for the table `cart` */
+
+insert  into `cart`(`id`,`uid`,`book_id`,`quantity`) values (12,1,'2020613225326',2),(14,1,'2020613225327',2);
+
+/*Table structure for table `user` */
+
+CREATE TABLE `user` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `username` varchar(20) NOT NULL,
+  `password` varchar(50) NOT NULL,
+  `is_admin` tinyint(1) NOT NULL,
+  PRIMARY KEY (`id`),
+  UNIQUE KEY `username` (`username`)
+) ENGINE=InnoDB AUTO_INCREMENT=4 DEFAULT CHARSET=utf8;
+
+/*Data for the table `user` */
+
+insert  into `user`(`id`,`username`,`password`,`is_admin`) values (1,'customer1','p455w0rd',0),(2,'customer2','p455w0rd',0),(3,'admin','p455w0rd',1);
+
+/*!40101 SET SQL_MODE=@OLD_SQL_MODE */;
+/*!40014 SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS */;
+/*!40014 SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS */;
+/*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;

main.py

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+# -*- coding:utf-8 -*-
+"""
+个性化商城首页
+"""
+from flask import Flask, render_template, session, redirect, url_for, request
+from flask_login import  LoginManager, login_required, login_user, current_user, logout_user
+from models import *
+import pymysql
+pymysql.install_as_MySQLdb() 
+import cart, stock
+import os
+
+ROOTDIR = os.path.abspath(os.path.dirname(__file__))
+
+APP = Flask(__name__)
+APP.register_blueprint(cart.shopping_cart, url_prefix="/cart")#定义购物车蓝图
+APP.register_blueprint(stock.stock, url_prefix="/stock")#库存蓝图
+APP.config['SQLALCHEMY_DATABASE_URI'] = 'mysql://debian-sys-maint:M8nVF2jdyGLu0Tx3@localhost:3306/bookmall?charset=utf8'
+APP.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
+APP.config['SECRET_KEY'] = '@bookstore2021'
+
+db.init_app(APP) #init database 
+login_manager = LoginManager(APP) 
+login_manager.login_view = 'login'
+
+@login_manager.user_loader  
+def load_user(user_id):
+    return User.query.get(int(user_id)) 
+
+@APP.route("/login")
+def login():
+    return render_template("login.html")
+
+
+@APP.route("/logout")#用户注销
+def logout():
+    logout_user()
+    return redirect("/login")
+
+
+@APP.route("/do_login", methods=["POST"])#用户登录
+def do_login():
+    user_name = request.form.get('user_name')#获取表单提交的用户名
+    password =  request.form.get('password')#密码
+    # 拿着获取到的用户名和密码进行登录
+    user = User.query.filter_by( username = user_name,password=password ).first() #查找该用户是否存在
+    if user:
+        login_user(user) 
+        if user.is_admin == True:#判断是否为管理员，跳转不同地址
+            return redirect('/stock')
+        else:
+            return redirect('/home')
+    else:
+        return render_template("login.html",err="Incorrect password!")#错误提示
+    return redirect("/")
+
+
+@APP.route("/")
+@APP.route("/home")
+@login_required 
+def index():
+    costs = 0
+    num = 0 
+    books = Bookinfo.query.filter(Bookinfo.stock > 0 )#查找库存大于0的书
+    cart = Cart.query.filter_by(uid=current_user.id).count() #判断购物车是否为空
+    if cart > 0:
+        for i in Cart.query.filter_by(uid=current_user.id ).all():#遍历购物车
+            num+=i.quantity #总数目
+            costs += i.book.retail_price*i.quantity #计算总价
+    return render_template("index.html", my_books=books,num=num,costs=costs )
+
+
+@APP.route("/detail/<isbn>")
+@login_required
+def detail(isbn):#图书详情
+    book = Bookinfo.query.get( isbn )#根据ISBN查找
+    return render_template("detail.html", book=book )  
+
+
+if __name__ == "__main__":
+    APP.run(host='0.0.0.0', port=5000, debug=False)

models.py

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+from flask_sqlalchemy import SQLAlchemy 
+from flask_login import  UserMixin
+db = SQLAlchemy() #实例化数据库对象
+
+class Bookinfo(db.Model):#图书信息表
+    __tablename__ = 'bookinfo'
+
+    isbn = db.Column(db.String(13), unique=True, primary_key = True )
+    title = db.Column(db.String(200), nullable=False)
+    author= db.Column(db.Text, nullable=False)
+    img =db.Column(db.Text, nullable=False)
+    stock = db.Column(db.Integer, nullable=False) 
+    trade_price =db.Column(db.Integer, nullable=False) 
+    retail_price =db.Column(db.Integer, nullable=False)  
+    pub_date= db.Column(db.Date, nullable=False) 
+    description =db.Column(db.Text, nullable=False) 
+
+class User(UserMixin, db.Model):#用户表
+    __tablename__ = 'user'
+
+    id = db.Column(db.Integer, primary_key=True)
+    username = db.Column(db.String(20), unique=True, nullable=False)
+    password = db.Column(db.String(50), nullable=False) 
+    is_admin = db.Column(db.Boolean, nullable=False ) 
+
+
+class Cart(db.Model):#购物车表
+    __tablename__ = 'cart'
+
+    id = db.Column(db.Integer, unique=True, primary_key=True ) 
+    uid = db.Column(db.Integer,  db.ForeignKey('user.id'))
+    book_id = db.Column(db.String(13), db.ForeignKey('bookinfo.isbn') ) 
+    quantity = db.Column(db.Integer, nullable=False ) 
+    book = db.relationship('Bookinfo', backref='cart')   
+
+
+
+