使用 Drizzle 和 Bun:SQLite 入门

基本文件结构

这是项目的基本文件结构。在 src/db 目录中，我们在 schema.ts 中有表定义。在 drizzle 文件夹中，有 SQL 迁移文件和快照。

📦 <project root>
 ├ 📂 drizzle
 ├ 📂 src
 │   ├ 📂 db
 │   │  └ 📜 schema.ts
 │   └ 📜 index.ts
 ├ 📜 .env
 ├ 📜 drizzle.config.ts
 ├ 📜 package.json
 └ 📜 tsconfig.json

步骤 1 - 安装所需的包

npm i drizzle-orm
npm i -D drizzle-kit @types/bun

yarn add drizzle-orm
yarn add -D drizzle-kit @types/bun

pnpm add drizzle-orm
pnpm add -D drizzle-kit @types/bun

bun add drizzle-orm
bun add -D drizzle-kit @types/bun

步骤 2 - 设置连接变量

Create a .env file in the root of your project and add your database connection variable:

DB_FILE_NAME=

DB_FILE_NAME=mydb.sqlite

步骤 3 - 将 Drizzle ORM 连接到数据库

Create a index.ts file in the src directory and initialize the connection:

import 'dotenv/config';
import { drizzle } from 'drizzle-orm/bun-sqlite';

const db = drizzle(process.env.DB_FILE_NAME!);

import 'dotenv/config';
import { drizzle } from 'drizzle-orm/bun-sqlite';

// You can specify any property from the libsql connection options
const db = drizzle({ connection: { source: process.env.DB_FILE_NAME! }});

If you need to provide your existing driver:

import 'dotenv/config';
import { drizzle } from 'drizzle-orm/bun-sqlite';
import { Database } from 'bun:sqlite';

const sqlite = new Database(process.env.DB_FILE_NAME!);
const db = drizzle({ client: sqlite });

步骤 4 - 创建一个表

Create a schema.ts file in the src/db directory and declare your table:

import { int, sqliteTable, text } from "drizzle-orm/sqlite-core";

export const usersTable = sqliteTable("users_table", {
  id: int().primaryKey({ autoIncrement: true }),
  name: text().notNull(),
  age: int().notNull(),
  email: text().notNull().unique(),
});

步骤 5 - 设置 Drizzle 配置文件

Drizzle config - a configuration file that is used by Drizzle Kit and contains all the information about your database connection, migration folder and schema files.

Create a drizzle.config.ts file in the root of your project and add the following content:

import 'dotenv/config';
import { defineConfig } from 'drizzle-kit';

export default defineConfig({
  out: './drizzle',
  schema: './src/db/schema.ts',
  dialect: 'sqlite',
  dbCredentials: {
    url: process.env.DB_FILE_NAME!,
  },
});

步骤 6 - 将更改应用到数据库

You can directly apply changes to your database using the drizzle-kit push command. This is a convenient method for quickly testing new schema designs or modifications in a local development environment, allowing for rapid iterations without the need to manage migration files:

npx drizzle-kit push

Read more about the push command in documentation.

npx drizzle-kit generate

npx drizzle-kit migrate

步骤 7 - 生成并查询数据库

Let’s update the src/index.ts file with queries to create, read, update, and delete users

import 'dotenv/config';
import { drizzle } from 'drizzle-orm/bun:sqlite';
import { eq } from 'drizzle-orm';
import { usersTable } from './db/schema';
  
const db = drizzle(process.env.DB_FILE_NAME!);

async function main() {
  const user: typeof usersTable.$inferInsert = {
    name: 'John',
    age: 30,
    email: 'john@example.com',
  };

  await db.insert(usersTable).values(user);
  console.log('New user created!')

  const users = await db.select().from(usersTable);
  console.log('Getting all users from the database: ', users)
  /*
  const users: {
    id: number;
    name: string;
    age: number;
    email: string;
  }[]
  */

  await db
    .update(usersTable)
    .set({
      age: 31,
    })
    .where(eq(usersTable.email, user.email));
  console.log('User info updated!')

  await db.delete(usersTable).where(eq(usersTable.email, user.email));
  console.log('User deleted!')
}

main();

步骤 8 - 运行 index.ts 文件

要使用 bun 运行脚本，请使用以下命令：

bun src/index.ts