Prisma 的房间管理系统-PHP中文网问答

我试图为房间管理系统创建一个数据库，但我对这些关系感到困惑，并且在互联网上找不到有用的资源，你能告诉我这个 prisma 脚本是否有问题吗？因为我想在expressJs中控制它并基于它制作一个应用程序

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "mysql"
  url      = env("DATABASE_URL")
}

model Guest {
  guestId     String        @id @default(uuid())
  name        String
  phone       String        @unique()
  address     String?
  nationality String
  Reservation Reservation[] @relation("GuestReservation")
}

model Reservation {
  reservationId Int             @id @default(autoincrement())
  checkIn       DateTime
  checkOut      DateTime
  Guest         Guest           @relation("GuestReservation", fields: [guestId], references: [guestId], onDelete: Cascade)
  guestId       String
  visitors      Int
  Room          Room            @relation("RoomReservation", fields: [roomId], references: [roomId], onDelete: Cascade)
  type          ReservationType
  roomId        Int
  Bill          Bill?           @relation("BillReservation")
}

enum ReservationType {
  Booking
  Contract
  Booked
  Canceled
}

model Room {
  roomId      Int           @id @default(autoincrement())
  price       Float
  type        Type
  Reservation Reservation[] @relation("RoomReservation")
}

enum Type {
  Single
  Double
  Triple
}

model Bill {
  invoiceNo     String      @id @default(uuid())
  Reservation   Reservation @relation("BillReservation", fields: [reservationId], references: [reservationId], onDelete: Cascade)
  reservationId Int         @unique()
  roomService   Float       @default(0)
  paymentMode   Payment
  Service       Service[]
}

enum Payment {
  Cash
  Visa
}

model Service {
  serviceId     String      @id @default(uuid())
  type          ServiceType
  name          String
  price         Float
  Bill          Bill        @relation(fields: [billInvoiceNo], references: [invoiceNo], onDelete: Cascade)
  billInvoiceNo String
}

enum ServiceType {
  Bar
  Laundry
}

我尝试为每个实体创建一个粗略的内容，但最终出现了关系错误，例如外来密钥之类的东西，这意味着我的关系有问题。

import { PrismaClient, Type, ServiceType, Payment, ReservationType, } from '@prisma/client'; const prisma = new PrismaClient({ log: ['query'], }); async function main() { // Creating a room await prisma.room.create({ data: { price: 100, type: Type.Single, roomId: 1, }, }); // Creating a guest await prisma.guest.create({ data: { name: 'Test', nationality: 'Indian', phone: '1234567890', address: 'Test Address', guestId: '1', }, }); // Creating a service with a bill and a reservation await prisma.service.create({ data: { name: 'test', price: 100, type: ServiceType.Bar, serviceId: '1', Bill: { create: { paymentMode: Payment.Cash, invoiceNo: '1', Reservation: { create: { checkIn: new Date(), checkOut: new Date(), type: ReservationType.Booked, visitors: 1, roomId: 1, guestId: '1', }, }, }, }, }, }); } main() .catch((e) => { throw e; }) .finally(async () => { await prisma.$disconnect(); });

> ts-node index.ts prisma:query BEGIN prisma:query INSERT INTO `white_egret`.`Room` (`roomId`,`price`,`type`) VALUES (?,?,?) prisma:query SELECT `white_egret`.`Room`.`roomId`, `white_egret`.`Room`.`price`, `white_egret`.`Room`.`type` FROM `white_egret`.`Room` WHERE `white_egret`.`Room`.`roomId` = ? LIMIT ? OFFSET ? prisma:query COMMIT prisma:query BEGIN prisma:query INSERT INTO `white_egret`.`Guest` (`guestId`,`name`,`phone`,`address`,`nationality`) VALUES (?,?,?,?,?) prisma:query SELECT `white_egret`.`Guest`.`guestId`, `white_egret`.`Guest`.`name`, `white_egret`.`Guest`.`phone`, `white_egret`.`Guest`.`address`, `white_egret`.`Guest`.`nationality` FROM `white_egret`.`Guest` WHERE `white_egret`.`Guest`.`guestId` = ? LIMIT ? OFFSET ? prisma:query COMMIT prisma:query BEGIN prisma:query INSERT INTO `white_egret`.`Reservation` (`reservationId`,`checkIn`,`checkOut`,`guestId`,`visitors`,`type`,`roomId`) VALUES (?,?,?,?,?,?,?) prisma:query INSERT INTO `white_egret`.`Bill` (`invoiceNo`,`reservationId`,`roomService`,`paymentMode`) VALUES (?,?,?,?) prisma:query INSERT INTO `white_egret`.`Service` (`serviceId`,`type`,`name`,`price`,`billInvoiceNo`) VALUES (?,?,?,?,?) prisma:query SELECT `white_egret`.`Service`.`serviceId`, `white_egret`.`Service`.`type`, `white_egret`.`Service`.`name`, `white_egret`.`Service`.`price`, `white_egret`.`Service`.`billInvoiceNo` FROM `white_egret`.`Service` WHERE `white_egret`.`Service`.`serviceId` = ? LIMIT ? OFFSET ? prisma:query COMMIT