系统分析与设计作业_5

领域模型

领域模型

阅读 Asg_RH 文档，按Task2要求，按用例构建领域模型

E-R模型

按 Task 3 要求，给出系统的 E-R 模型（数据逻辑模型）

SQL脚本

-- MySQL Script generated by MySQL Workbench
-- Sun Apr 29 21:47:14 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`.`address`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`address` (
`id` INT NOT NULL,
`city` VARCHAR(45) NOT NULL,
`road` VARCHAR(45) NOT NULL,
PRIMARY KEY (`id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`hotel`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`hotel` (
`id` INT NOT NULL,
`name` VARCHAR(45) NOT NULL,
`rating` INT NOT NULL,
`average_price` INT NOT NULL,
`address_id` INT NOT NULL,
PRIMARY KEY (`id`),
INDEX `fk_hotel_address_idx` (`address_id` ASC),
CONSTRAINT `fk_hotel_address`
FOREIGN KEY (`address_id`)
REFERENCES `mydb`.`address` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`room`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`room` (
`id` INT NOT NULL,
`price` INT NOT NULL,
`type` VARCHAR(45) NOT NULL,
`hotel_id` INT NOT NULL,
PRIMARY KEY (`id`),
INDEX `fk_room_hotel1_idx` (`hotel_id` ASC),
CONSTRAINT `fk_room_hotel1`
FOREIGN KEY (`hotel_id`)
REFERENCES `mydb`.`hotel` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`reservation_customer`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`reservation_customer` (
`id` INT NOT NULL,
`email` VARCHAR(45) NOT NULL,
`name` VARCHAR(45) NOT NULL,
PRIMARY KEY (`id`))
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`reservation`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`reservation` (
`id` INT NOT NULL,
`checkIn_data` DATETIME NOT NULL,
`checkOut_data` DATETIME NOT NULL,
`hotel_id` INT NOT NULL,
`reservation_customer_id` INT NOT NULL,
PRIMARY KEY (`id`),
INDEX `fk_reservation_hotel1_idx` (`hotel_id` ASC),
INDEX `fk_reservation_reservation_customer1_idx` (`reservation_customer_id` ASC),
CONSTRAINT `fk_reservation_hotel1`
FOREIGN KEY (`hotel_id`)
REFERENCES `mydb`.`hotel` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION,
CONSTRAINT `fk_reservation_reservation_customer1`
FOREIGN KEY (`reservation_customer_id`)
REFERENCES `mydb`.`reservation_customer` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;


-- -----------------------------------------------------
-- Table `mydb`.`reservation_room`
-- -----------------------------------------------------
CREATE TABLE IF NOT EXISTS `mydb`.`reservation_room` (
`id` INT NOT NULL,
`adults` INT NOT NULL,
`children` INT NOT NULL,
`reservation_id` INT NOT NULL,
PRIMARY KEY (`id`),
INDEX `fk_reservation_room_reservation1_idx` (`reservation_id` ASC),
CONSTRAINT `fk_reservation_room_reservation1`
FOREIGN KEY (`reservation_id`)
REFERENCES `mydb`.`reservation` (`id`)
ON DELETE NO ACTION
ON UPDATE NO ACTION)
ENGINE = InnoDB;


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

1. 领域模型根据用例场景分析得到实体，而数据库逻辑模型式根据场景分析业务实体之间的关系，二者视角不同；
2. 领域模型的实体并不是全部都需要存储下来的，而数据库逻辑的实体要受到数据关系范式的限制；
3. 数据库逻辑模型以数据为中心，关注的是对象的实体和关系，建模时不考虑Entity的行为；而领域模型是属于对象建模的范畴，需要为对象建立行为。