Creating a Dynamic Database Module in NestJS Creating a Dynamic Database Module in NestJS

In a NestJS application, structuring database connections efficiently is crucial, especially when working with TypeORM. A modular approach helps keep the database configuration flexible and scalable. In this article, we’ll explore how to create a dynamic DatabaseModule that allows for flexible database configuration and reuse across different modules.

Setting Up the Database Module

Instead of hardcoding the database connection settings in various parts of the application, we can create a reusable module that accepts configuration dynamically. This approach is particularly useful for multi-tenant applications or when working with different environments.

DatabaseModule Implementation

The DatabaseModule is a dynamic module that registers a TypeORM DataSource based on the provided configuration.

Note: In this case, I have already generated the module named ‘database,’ but if you want to generate one, you can do so by running nest g mo database. If you already have one and want to use it, you can.

import { DynamicModule, Module } from '@nestjs/common';
import { DataSource, DataSourceOptions } from 'typeorm';

@Module({})
export class…