Instances

Single

The default DataSource instance can be acquired, by not providing any alias at all or using the key default. If no DataSource instance or DataSourceOptions object is deposited initially, the method will attempt to locate and load the DataSource file and initialize itself from there.

import { useDataSource } from 'typeorm-extension';

(async () => {
    const dataSource : DataSource = await useDataSource();
})();

Reference(s):

• useDataSource

Multiple

It is also possible to manage multiple DataSource instances. Therefore, each additional DataSource must be registered under a different alias. This can be done by either setting the DataSource instance or the DataSourceOptions object for the given alias.

import { DataSource, DataSourceOptions } from 'typeorm';
import { setDataSource, useDataSource } from 'typeorm-extension';

(async () => {
    const secondDataSourceOptions : DataSourceOptions = {
        // ...
    };

    const dataSource = new DataSource(secondDataSourceOptions);
    setDataSource(dataSource, 'second');

    const instance : DataSource = await useDataSource('second');
})();

Reference(s):

• setDataSource
• setDataSourceOptions