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。
您的架构是有效的，但我建议在为表定义 id 时保持一致性。有些表的id是字符串类型，有些表的id是数字类型。
以下是为模型创建实体的查询示例。
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(); });这是查询响应：