A developer refactors a NestJS project by removing default files and generating a new user module, controller, and service via CLI. They implement a POST endpoint for user creation, define a data transfer object (DTO) for requests, and inject the service into the controller to handle business logic.
Length 5:03
Captions English (Generated), Spanish (Auto-translated), French (Auto-translated), Korean (Auto-translated), Portuguese (Auto-translated), Vietnamese (Auto-translated) #nestjs #typescript #backend #web development #cli #module #controller #service #dto #programming
0:00 All right, so before we get started, let's go ahead and remove our 0:05 default app.service and app.controller files 0:09 as we're not gonna need these default files provided by NestJS. 0:13 So we'll go ahead and delete them, and then importantly, remove them from our 0:17 app.module so that we aren't importing them or using them 0:20 here. 0:22 Now, what I wanna do is create a brand-new module that's gonna 0:25 encapsulate 0:26 all of our logic behind users. So to do this 0:30 easily, we can take advantage of the Nest CLI by 0:33 opening a new 0:34 backend and then running Nest generate module 0:38 users. 0:40 So this will go ahead and create a new user's directory with the 0:44 user's 0:44 module inside, and then importantly, it will actually import it 0:48 directly f- into our root app module so 0:51 that our application 0:52 will be aware of it. Let's go ahead and also add 0:56 a controller by just changing the command Nest generate 1:00 and add a controller. 1:02 This will go ahead and create a new controller for us, 1:05 prefixed with the 1:06 user's path, 1:09 and update our user's module with the new controller definition. 1:13 Let's go ahead and do the same thing for a service now, which is where we're gonna 1:17 encapsulate the actual business logic to persist 1:21 these users. So just as we'd expect, we have this new injectable 1:25 class, the user service, and it's defined in our user's 1:29 module as providers. 1:32 So let's go ahead and now start filling out our user's 1:34 controller to 1:35 define a new post method where we can actually send 1:39 requests to, to create a new user. So to do this, we'll use 1:43 the at post decorator from NestJS/common, 1:47 and then define the create user function 1:51 that is going to go ahead and just be an empty function body for 1:54 now. 1:55 Now, what I wanna do next is actually define the body
The rest of the transcript is for members.
Sign in 