现在你应该拥有这样的文件结构
📦 <project root>
├ 📂 dbschema
│ ├ 📂 migrations
│ ├ 📜 default.esdl
│ └ 📜 scoping.esdl
├ 📂 src
│ └ 📜 index.ts
├ 📜 drizzle.config.ts
├ 📜 edgedb.toml
├ 📜 package.json
└ 📜 tsconfig.jsonDrizzle 原生支持与 gel 客户端的 Gel 连接。
这是项目的基本文件结构。在 src 目录中,我们有 index.ts 中的表定义。在 drizzle 文件夹中,包含生成的 Gel 到 Drizzle 模式
📦 <project root>
├ 📂 drizzle
├ 📂 src
│ └ 📜 index.ts
├ 📜 drizzle.config.ts
├ 📜 package.json
└ 📜 tsconfig.jsonnpx gel 项目初始化
在 dbschema/default.esdl 文件中添加一个基本的 Gel 模式
module default {
type user {
name: str;
required email: str;
age: int16;
}
}生成 Gel 迁移文件:
gel migration create将 Gel 迁移应用于数据库
gel migration apply现在你应该拥有这样的文件结构
📦 <project root>
├ 📂 dbschema
│ ├ 📂 migrations
│ ├ 📜 default.esdl
│ └ 📜 scoping.esdl
├ 📂 src
│ └ 📜 index.ts
├ 📜 drizzle.config.ts
├ 📜 edgedb.toml
├ 📜 package.json
└ 📜 tsconfig.jsonnpm i drizzle-orm gel -D drizzle-kit tsx
Drizzle 配置 - Drizzle 套件 使用的配置文件,包含有关数据库连接、迁移文件夹和模式文件的所有信息。
在项目根目录中创建一个 drizzle.config.ts 文件并添加以下内容:
import { defineConfig } from 'drizzle-kit';
export default defineConfig({
dialect: 'gel',
});拉取数据库模式:
npx drizzle-kit pull
以下是生成的 schema.ts 文件的示例:
import { gelTable, uniqueIndex, uuid, smallint, text } from "drizzle-orm/gel-core"
import { sql } from "drizzle-orm"
export const users = gelTable("users", {
id: uuid().default(sql`uuid_generate_v4()`).primaryKey().notNull(),
age: smallint(),
email: text().notNull(),
name: text(),
}, (table) => [
uniqueIndex("a8c6061c-f37f-11ef-9249-0d78f6c1807b;schemaconstr").using("btree", table.id.asc().nullsLast().op("uuid_ops")),
]);在 src 目录中创建一个 index.ts 文件并初始化连接:
import { drizzle } from "drizzle-orm/gel";
import { createClient } from "gel";
const gelClient = createClient();
const db = drizzle({ client: gelClient });import { eq } from "drizzle-orm";
import { drizzle } from "drizzle-orm/gel";
import { createClient } from "gel";
import { users } from "../drizzle/schema";
const gelClient = createClient();
const db = drizzle({ client: gelClient });
async function main() {
const user: typeof users.$inferInsert = {
name: "John",
age: 30,
email: "john@example.com",
};
await db.insert(users).values(user);
console.log("New user created!");
const usersResponse = await db.select().from(users);
console.log("Getting all users from the database: ", usersResponse);
/*
const users: {
id: number;
name: string;
age: number;
email: string;
}[]
*/
await db
.update(users)
.set({
age: 31,
})
.where(eq(users.email, user.email));
console.log("User info updated!");
await db.delete(users).where(eq(users.email, user.email));
console.log("User deleted!");
}
main();To run any TypeScript files, you have several options, but let’s stick with one: using tsx
You’ve already installed tsx, so we can run our queries now
Run index.ts script
npx tsx src/index.ts
We suggest using bun to run TypeScript files. With bun, such scripts can be executed without issues or additional
settings, regardless of whether your project is configured with CommonJS (CJS), ECMAScript Modules (ESM), or any other module format.
To run a script with bun, use the following command:
bun src/index.tsIf you don’t have bun installed, check the Bun installation docs