NestJs Questions

Controllers and modules are unrelated concepts in NestJS.

Modules are defined within controllers.

Controllers exist independently of modules.

Controllers are defined within modules, and their scope is limited to that module.

Accesses query parameters

Accesses the entire request body

Accesses route parameters

Accesses the request headers

Using @Query()

Using @Headers()

Using @Param()

Using @Body()

To send a response back to the client.

To terminate the request-response cycle.

To log information about the request.

To pass control to the next middleware in the stack or the route handler.

Dependency Injection is not supported in NestJS.

Dependencies are manually created and passed around.

Dependencies are fetched from a global configuration file.

NestJS automatically resolves and injects dependencies based on constructor parameters.

To specify middleware for the route

To send the response to the client

To define the route path

To handle errors within the route

PUT

DELETE

RENDER

PATCH

It provides access to the dependency injection container.

It represents the next Interceptor in the chain or the route handler itself.

It provides utility methods for transforming the request object.

It handles errors thrown within the Interceptor.

Modules

Services

Components

Controllers

By using the @Inject() decorator and specifying the provider's class name.

By creating a new instance of the provider using its constructor.

By importing the module containing the provider into the module where you need it.

By accessing the global NestJS container.