将 Prisma Migrate 与 JavaScript 和 PostgreSQL 结合使用

创建数据库架构

¥Creating the database schema

在本指南中，你将使用 Prisma 迁移在数据库中创建表。将以下数据模型添加到 prisma/schema.prisma 中的 Prisma 架构：

¥In this guide, you'll use Prisma Migrate to create the tables in your database. Add the following data model to your Prisma schema in prisma/schema.prisma:

prisma/schema.prisma

model Post {
  id        Int      @id @default(autoincrement())
  createdAt DateTime @default(now())
  updatedAt DateTime @updatedAt
  title     String   @db.VarChar(255)
  content   String?
  published Boolean  @default(false)
  author    User     @relation(fields: [authorId], references: [id])
  authorId  Int
}

model Profile {
  id     Int     @id @default(autoincrement())
  bio    String?
  user   User    @relation(fields: [userId], references: [id])
  userId Int     @unique
}

model User {
  id      Int      @id @default(autoincrement())
  email   String   @unique
  name    String?
  posts   Post[]
  profile Profile?
}

要将数据模型映射到数据库模式，你需要使用 prisma migrate CLI 命令：

¥To map your data model to the database schema, you need to use the prisma migrate CLI commands:

npx prisma migrate dev --name init

该命令做了两件事：

¥This command does two things:

它为此迁移创建一个新的 SQL 迁移文件

¥It creates a new SQL migration file for this migration
它针对数据库运行 SQL 迁移文件

¥It runs the SQL migration file against the database

注意

运行 prisma migrate dev 后，默认情况下会在后台调用 generate。如果你的架构中定义了 prisma-client-js 生成器，这将检查是否安装了 @prisma/client，如果缺少则安装它。

¥generate is called under the hood by default, after running prisma migrate dev. If the prisma-client-js generator is defined in your schema, this will check if @prisma/client is installed and install it if it's missing.

太棒了，你现在使用 Prisma Migrate 在数据库中创建了三个表 🚀

¥Great, you now created three tables in your database with Prisma Migrate 🚀

创建数据库架构​

创建数据库架构