Organizing Code with Modules

As your application grows, keeping everything in a single module becomes difficult to manage.

Instead of placing all controllers and services in app.module.ts, you can create separate modules for different features.

For example, create a module for users:

users.module.ts

Add the following code:

import { Module } from '@nestjs/common';
import { UsersController } from './users.controller';
import { UsersService } from './users.service';

@Module({
  controllers: [UsersController],
  providers: [UsersService],
})
export class UsersModule {}

This module groups everything related to users.

Now connect it to the main module:

import { Module } from '@nestjs/common';
import { UsersModule } from './users.module';

@Module({
  imports: [UsersModule],
})
export class AppModule {}

Here is what is happening:

• UsersModule: contains user-related logic;
• imports: connects the module to the application;
• The main module stays clean and minimal.

Instead of one large file, your application is now split into smaller, focused parts.

This makes your code easier to navigate and maintain.