系统分析与设计 — Homework 5 (lesson 7)

最新推荐文章于 2018-07-01 14:31:07 发布

Yung_Lin

最新推荐文章于 2018-07-01 14:31:07 发布

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分类专栏：系统分析与设计作业

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本文介绍了通过UMLet构建领域模型的过程，并使用MySQLWorkbench创建了E-R模型，详细展示了涉及的各实体表及其之间的关系，同时对比了领域模型与数据库模型的区别。

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系统分析与设计 — Homework 5 (lesson 7)

领域建模

**a. 阅读 Asg_RH 文档，按用例构建领域模型。**

按 Task2 要求，请使用工具 UMLet，截图格式务必是 png 并控制尺寸
说明：请不要受 PCMEF 层次结构影响。你需要识别实体（E）和中介实体（M，也称状态实体）
- 在单页面应用（如 vue）中，E 一般与数据库构建有关， M 一般与 store 模式有关
- 在 java web 应用中，E 一般与数据库构建有关， M 一般与 session 有关

这里写图片描述

b. 数据库建模(E-R 模型)

按 Task 3 要求，给出系统的 E-R 模型（数据逻辑模型）

建模工具为 MySQL Workbench。
导出 Mysql 物理数据库的脚本

-- MySQL Script generated by MySQL Workbench
-- Sun Apr 29 22:27:54 2018
-- Model: New Model    Version: 1.0
-- MySQL Workbench Forward Engineering

SET @OLD_UNIQUE_CHECKS=@@UNIQUE_CHECKS, UNIQUE_CHECKS=0;
SET @OLD_FOREIGN_KEY_CHECKS=@@FOREIGN_KEY_CHECKS, FOREIGN_KEY_CHECKS=0;
SET @OLD_SQL_MODE=@@SQL_MODE, SQL_MODE='TRADITIONAL,ALLOW_INVALID_DATES';

-- -----------------------------------------------------
-- Schema mydb
-- -----------------------------------------------------

-- -----------------------------------------------------
-- Schema mydb
-- -----------------------------------------------------
CREATE SCHEMA IF NOT EXISTS `mydb` DEFAULT CHARACTER SET utf8 ;
USE `mydb` ;

-- -----------------------------------------------------
-- Table `mydb`.`Customer`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`Customer` (
  `customer_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `gender` VARCHAR(10) NOT NULL,
  `name` VARCHAR(45) NOT NULL,
  `email` VARCHAR(45) NOT NULL,
  `phone_number` VARCHAR(45) NOT NULL,
  `address` VARCHAR(45) NOT NULL,
  PRIMARY KEY (`customer_id`),
  UNIQUE INDEX `CustomerID_UNIQUE` (`customer_id` ASC))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`CreditCard`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`CreditCard` (
  `creditcard_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `card_number` VARCHAR(45) NOT NULL,
  `card_security_code` VARCHAR(45) NOT NULL,
  `expiry_date` DATE NOT NULL,
  `Customer_customer_id` INT UNSIGNED NOT NULL,
  PRIMARY KEY (`creditcard_id`, `Customer_customer_id`),
  UNIQUE INDEX `creditcard_id_UNIQUE` (`creditcard_id` ASC),
  INDEX `fk_CreditCard_Customer1_idx` (`Customer_customer_id` ASC),
  CONSTRAINT `fk_CreditCard_Customer1`
    FOREIGN KEY (`Customer_customer_id`)
    REFERENCES `mydb`.`Customer` (`customer_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`ShopingBasket`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`ShopingBasket` (
  `shopingbasket_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `total` FLOAT NOT NULL,
  `details` VARCHAR(100) NOT NULL,
  `Customer_customer_id` INT UNSIGNED NOT NULL,
  `CreditCard_creditcard_id` INT UNSIGNED NOT NULL,
  PRIMARY KEY (`shopingbasket_id`, `Customer_customer_id`, `CreditCard_creditcard_id`),
  UNIQUE INDEX `shopingbasket_id_UNIQUE` (`shopingbasket_id` ASC),
  INDEX `fk_ShopingBasket_Customer_idx` (`Customer_customer_id` ASC),
  INDEX `fk_ShopingBasket_CreditCard1_idx` (`CreditCard_creditcard_id` ASC),
  CONSTRAINT `fk_ShopingBasket_Customer`
    FOREIGN KEY (`Customer_customer_id`)
    REFERENCES `mydb`.`Customer` (`customer_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_ShopingBasket_CreditCard1`
    FOREIGN KEY (`CreditCard_creditcard_id`)
    REFERENCES `mydb`.`CreditCard` (`creditcard_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);


-- -----------------------------------------------------
-- Table `mydb`.`Reservation`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`Reservation` (
  `reservation_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `total` FLOAT NOT NULL,
  `detailds` VARCHAR(255) NOT NULL,
  `ShopingBasket_shopingbasket_id` INT UNSIGNED NOT NULL,
  PRIMARY KEY (`reservation_id`, `ShopingBasket_shopingbasket_id`),
  UNIQUE INDEX `reservation_id_UNIQUE` (`reservation_id` ASC),
  INDEX `fk_Reservation_ShopingBasket1_idx` (`ShopingBasket_shopingbasket_id` ASC),
  CONSTRAINT `fk_Reservation_ShopingBasket1`
    FOREIGN KEY (`ShopingBasket_shopingbasket_id`)
    REFERENCES `mydb`.`ShopingBasket` (`shopingbasket_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);


-- -----------------------------------------------------
-- Table `mydb`.`Room`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`Room` (
  `room_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `room_type` VARCHAR(45) NOT NULL,
  `price` FLOAT NOT NULL,
  `Reservation_reservation_id` INT UNSIGNED NOT NULL,
  PRIMARY KEY (`room_id`, `Reservation_reservation_id`),
  UNIQUE INDEX `room_id_UNIQUE` (`room_id` ASC),
  INDEX `fk_Room_Reservation1_idx` (`Reservation_reservation_id` ASC),
  CONSTRAINT `fk_Room_Reservation1`
    FOREIGN KEY (`Reservation_reservation_id`)
    REFERENCES `mydb`.`Reservation` (`reservation_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);


-- -----------------------------------------------------
-- Table `mydb`.`Hotel`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`Hotel` (
  `hotel_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `name` VARCHAR(45) NOT NULL,
  `Room_room_id` INT UNSIGNED NOT NULL,
  PRIMARY KEY (`hotel_id`, `Room_room_id`),
  UNIQUE INDEX `hotel_id_UNIQUE` (`hotel_id` ASC),
  INDEX `fk_Hotel_Room1_idx` (`Room_room_id` ASC),
  CONSTRAINT `fk_Hotel_Room1`
    FOREIGN KEY (`Room_room_id`)
    REFERENCES `mydb`.`Room` (`room_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);


-- -----------------------------------------------------
-- Table `mydb`.`Location`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`Location` (
  `location_id` INT NOT NULL,
  `name` VARCHAR(45) NOT NULL,
  `code` VARCHAR(45) NOT NULL,
  `Hotel_hotel_id` INT UNSIGNED NOT NULL,
  PRIMARY KEY (`location_id`, `Hotel_hotel_id`),
  INDEX `fk_Location_Hotel1_idx` (`Hotel_hotel_id` ASC),
  CONSTRAINT `fk_Location_Hotel1`
    FOREIGN KEY (`Hotel_hotel_id`)
    REFERENCES `mydb`.`Hotel` (`hotel_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);


-- -----------------------------------------------------
-- Table `mydb`.`SearchResult`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`SearchResult` (
  `searchresult_id` INT UNSIGNED NOT NULL AUTO_INCREMENT,
  `checkin_date` DATE NOT NULL,
  `checkout_date` DATE NOT NULL,
  `Customer_customer_id` INT UNSIGNED NOT NULL,
  `Location_location_id` INT NOT NULL,
  PRIMARY KEY (`searchresult_id`, `Customer_customer_id`, `Location_location_id`),
  UNIQUE INDEX `searchresult_id_UNIQUE` (`searchresult_id` ASC),
  INDEX `fk_SearchResult_Customer1_idx` (`Customer_customer_id` ASC),
  INDEX `fk_SearchResult_Location1_idx` (`Location_location_id` ASC),
  CONSTRAINT `fk_SearchResult_Customer1`
    FOREIGN KEY (`Customer_customer_id`)
    REFERENCES `mydb`.`Customer` (`customer_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION,
  CONSTRAINT `fk_SearchResult_Location1`
    FOREIGN KEY (`Location_location_id`)
    REFERENCES `mydb`.`Location` (`location_id`)
    ON DELETE NO ACTION
    ON UPDATE NO ACTION);


SET SQL_MODE=@OLD_SQL_MODE;
SET FOREIGN_KEY_CHECKS=@OLD_FOREIGN_KEY_CHECKS;
SET UNIQUE_CHECKS=@OLD_UNIQUE_CHECKS;

简单叙说数据库逻辑模型与领域模型的异同
- 同：
  对于Entity，两则均描述了实体间的关系，以及实体所具有的属性。
- 异：
  - 领域模型主要面向需求，其针对实际场景的问题解决方案的对象，构建的是对象的行为，反映的是问题域的相关业务概念以及其关系，是用户业务描述的高度抽象。
  - 数据库模型描述的是对用户需求在技术上的实现方法，包括构建数据本身与其存储结构，明确给出各个字段的数据类型。