feat: Add sequelize sample for javascript

javascript/sequelize/README-CN.md

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+# 使用 Sequelize 连接 OceanBase
+
+[English](README.md) | 简体中文
+
+本文介绍如何通过 [Sequelize](https://sequelize.org) 连接 [OceanBase](https://www.oceanbase.com) 数据库。
+
+## 准备工作
+
+确保 Node.js 和 npm 已经安装。
+
+## 项目使用
+
+拉取项目并进入相应目录:
+
+```bash
+git clone [email protected]:oceanbase/ob-samples.git
+cd javascript/sequelize
+```
+
+安装依赖:
+
+```bash
+npm install
+```
+
+修改 `index.js` 中的数据库连接串:
+
+```javascript
+const sequelize = new Sequelize("mysql://root:@127.0.0.1:2881/test", {
+  dialect: "mysql",
+  logging: false,
+});
+```
+
+执行 `index.js` 中的示例代码:
+
+```bash
+node index.js
+```
+
+输出以下内容，说明执行成功:
+
+```bash
+[
+  {
+    "id": 1,
+    "email": "[email protected]",
+    "name": "Alice"
+  }
+]
+```
+
+查看对应的 `users` 表，数据已正常插入:
+
+```bash
+mysql> select * from users;
++----+---------------------+-------+
+| id | email               | name  |
++----+---------------------+-------+
+|  1 | [email protected] | Alice |
++----+---------------------+-------+
+1 row in set (0.01 sec)
+```

javascript/sequelize/README.md

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+# Connect to OceanBase with Sequelize
+
+English | [简体中文](README-CN.md)
+
+This document describes how to connect to [OceanBase](https://www.oceanbase.com) with [Sequelize](https://sequelize.org).
+
+## 准备工作
+
+Make sure `Node.js` and `npm` are installed.
+
+## 项目使用
+
+Clone the project and navigate to the appropriate directory:
+
+```bash
+git clone [email protected]:oceanbase/ob-samples.git
+cd javascript/sequelize
+```
+
+Install dependencies:
+
+```bash
+npm install
+```
+
+Modify the connection string in the `index.js` file:
+
+```javascript
+const sequelize = new Sequelize("mysql://root:@127.0.0.1:2881/test", {
+  dialect: "mysql",
+  logging: false,
+});
+```
+
+Execute `index.js`:
+
+```bash
+node index.js
+```
+
+The output should be as follows, indicating successful execution:
+
+```bash
+[
+  {
+    "id": 1,
+    "email": "[email protected]",
+    "name": "Alice"
+  }
+]
+```
+
+Check the corresponding `users` table and the data has been inserted:
+
+```bash
+mysql> select * from users;
++----+---------------------+-------+
+| id | email               | name  |
++----+---------------------+-------+
+|  1 | [email protected] | Alice |
++----+---------------------+-------+
+1 row in set (0.01 sec)
+```

javascript/sequelize/index.js

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+const { Sequelize, DataTypes } = require("sequelize");
+
+const sequelize = new Sequelize("mysql://root:@127.0.0.1:2881/test", {
+  dialect: "mysql",
+  logging: false,
+});
+
+const UserModel = sequelize.define(
+  "users",
+  {
+    id: {
+      field: "id",
+      type: DataTypes.BIGINT,
+      autoIncrement: true,
+      primaryKey: true,
+      allowNull: false,
+    },
+    email: {
+      field: "email",
+      type: DataTypes.STRING,
+      unique: true,
+      allowNull: false,
+    },
+    name: {
+      field: "name",
+      type: DataTypes.STRING,
+      allowNull: false,
+    },
+  },
+  {
+    timestamps: false,
+  }
+);
+
+async function main() {
+  await UserModel.sync();
+  await UserModel.create({
+    name: "Alice",
+    email: "[email protected]",
+  });
+  const allUsers = await UserModel.findAll();
+  console.log(JSON.stringify(allUsers, null, 2));
+}
+
+main()
+  .then(async () => {
+    await sequelize.close();
+  })
+  .catch(async (e) => {
+    console.error(e);
+    await sequelize.close();
+    process.exit(1);
+  });

javascript/sequelize/package.json

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+{
+  "name": "sequelize",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "dependencies": {
+    "mysql2": "^3.11.3",
+    "sequelize": "^6.37.5"
+  }
+}