WEBVTT

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Hi everyone.

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Let's continue with CRUD operations.

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And in this video will be the update action.

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Okay.

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Now let me remove DTO here to fix the warning.

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And now go to the post controller and I will create a method called @Put.

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Okay.

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The @Put will be for update.

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And because we update we need to know what is the ID of the post we want to update.

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Right.

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And we will update with @Param('id) id: string

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And now because we update we need the payload or the request body.

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And for that reason I will use the annotation @Body right here.

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And request body.

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But what is inside the request body right here.

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Now if you see in the post of the create.

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We have a createPostDTO right here.

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So for that reason, we need.

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We need the post.

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The UpdatePostDTO

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Right.

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So I will create a new file inside the DTO, update-post.dto.ts

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And actually right here we will export the class.

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Actually we use the same with the CreatePostDTO

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I will copy all of that because I'm very lazy.

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So I'll use the UpdatePostDTO

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Okay?

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And that what we want

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It will be the same, but.

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We need to separate it.

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Okay?

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Make sure we separate it.

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And right here I will use the UpdatePostDTO

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The reason we separate is because later if you want to add some validation only for the updates,

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we can easily add it right here and now.

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Let me go to the service and scroll down and call async update

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Give the ID string.

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And the request body.

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We will UpdatePostDTO like that.

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Very cool.

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Now how I can update.

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Actually, in order to update we can use the find.

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findByIdAndUpdate or findOneAndUpdate 

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And update it will be the same.

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And the second way we will use, we will update it by hand.

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So look up the get one and update.

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Let me show you the second way.

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Okay.

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I will find the post.

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= await this.

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getOne

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Okay.

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I will get the post.

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Inside the method.

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Right here.

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We already write it before, right?

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And for that reason, I can give you the post.title = requestBody.title and post.description

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= requestBody.description

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And I will return.

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I will return post.save()

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Okay.

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And that's it, that for the update

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And I will go to the controller right here.

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And I will return this.

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postService

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.update(id, requestBody), okay, that's it

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And let me show you how it works, in here I will duplicate and I will change to the PUT method, right?

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and will be update post.

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We have a ID so we will pass the ID right here.

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The title

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Will be "post 1 update"and description

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Will be "description 1"

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Update

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Okay, let me send.

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Uh, actually it's not found

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Let me go to the database.

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I will be here and I will paste it right here.

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I will send it again.

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Uh, why it not found?

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This I.

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Go.

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We use the @Put

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And the :id, oh sorry.

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We make a mistake right here.

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Okay, you typo correctly, will be :id

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Okay, let me send.

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Let me send.

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And now you can say this already updated for me the title and description.

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Right.

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And that's What we want.

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But for example, if I remove the description and I send the update. Let's see what happens.

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If I send, now it say the description should not be empty.

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The reason because I used is not empty right here.

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It means we will pass the description and the title.

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So how I can only update the title or only update the description?

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I want to do that.

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How I can do that right.

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And actually this is not the job of the @Put method.

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With the PUT method we will update all fields

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And in the next video I will show you how we can use the PATCH method.

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The PATCH methods will be update one fields.

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Okay.

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The job of the PATCH and I will show you in the next one.