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Route parameters allow you to pass dynamic values in the URL.

For example, instead of requesting all users, you can request a specific user by ID.

Define a route parameter like this:

import { Controller, Get, Param } from '@nestjs/common';

@Controller('users')
export class UsersController {
  @Get(':id')
  getUserById(@Param('id') id: string) {
    return `User ID: ${id}`;
  }
}

:id: defines a dynamic part of the URL;
@Param('id'): extracts the value from the URL;
id: is passed into the method.

When you open:

/users/5

The response will be:

User ID: 5

You can use route parameters whenever you need to work with specific data, such as users, products, or orders.

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Sektion 2. Kapitel 4

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Working with Route Parameters