WEBVTT

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Hi everyone.

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Before I go into the validation step, I want to talk a little bit more about "DTO".

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Now in previous video we already see, when we send the data we will send the "DTO", right?

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And when we response the data from the server we need the "DTO".

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Because you can see in here we don't need to check the "Id" or the or actually we need the ID, but we

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don't need the "__v" right here.

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Right?

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I don't want that

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So I can easily remove that using the DTO.

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And you can see right here, we can easily do something like, like this Right here.

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We will save that into the variable.

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Right.

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data = await

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Sorry, it's same name.

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I will use the "post" right here.

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And with the "post" I can return the title.

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What's the title and description?

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post.description

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Right.

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We can do that.

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And let's see I will undo

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Here you can say very good.

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Right.

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And if you want the "id", you can say the _id: post._id, right here

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It also return. But let me write it in the best way with the "DTO".

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So in the DTO here I will create one more detail called the.

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response-post.dto.ts

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And I will copy the class right here, paste it to here because it's very similar, response post

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DTO

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Okay, this is the class.

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And in here, I can write a helper methods to convert the entities into the class.

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But right now I will not do that.

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I will show you the easy way right here.

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I will create a postDto = new ResponsePostDTO()

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Post DTO

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And with the postDto, I can use postDto.title

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= post.title

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post

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._id

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Sorry.

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Sorry.

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post

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post.title, postDto.description

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post.description

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And if we need the ID, we will provide the ID right here.

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string

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postDto.id actually "_id" is best.

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= post.

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post

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._id

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And we will return.

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Oh because the "_id" here is the "TypeId" and we can convert this using string if you want.

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Okay.

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I will convert this .toString() here

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Okay.

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That's the purpose of the "DTO".

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And I will return right here.

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Now you can see what happened right now I can use the typescript right here okay.

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Promise.

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With the ResponsePostDTO

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Right.

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Very cool.

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And because we will wrap it inside the promise.

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Because we use the async.

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And async always return promise.

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Okay, this is the JavaScript knowledge.

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If I send it again.

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Very cool, right?

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We have a "_id" "description", we no longer have the "__v" anymore

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And actually, if you want, you can easily remove the underscore.

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v

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Okay.

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But in the MVC architecture we usually use the "DTO"

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To access when we send a request or when we return the response, we use the "DTO".

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So that's it, that's for the video.

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And in the next video I will show you how we can validation when we send a request.

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Right.

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I will see you in the next one.