feat: Add typeorm sample for javascript

[dengfuping]

• Ref: Help Wanted: Contribute more demos to OceanBase. #16

---

Connect to OceanBase with TypeORM

This document describes how to connect to OceanBase with TypeORM.

Preparation

Make sure Node.js and npm are installed.

Usage

Clone the project and navigate to the appropriate directory:

git clone [email protected]:oceanbase/ob-samples.git
cd javascript/typeorm

Install dependencies:

npm install

Modify the connection string in the index.ts file:

const dataSource = new DataSource({
  type: "mysql",
  url: "mysql://root:@127.0.0.1:2881/test",
  entities: [User],
  synchronize: true,
});

Execute index.ts:

npx ts-node index.ts

The output should be as follows, indicating successful execution:

[ User { id: 1, email: '[email protected]', name: 'Alice' } ]

Check the corresponding users table and the data has been inserted:

mysql> select * from users;
+----+---------------------+-------+
| id | email               | name  |
+----+---------------------+-------+
|  1 | [email protected] | Alice |
+----+---------------------+-------+
1 row in set (0.01 sec)

[whhe]

LGTM, thanks for your contribution!